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This CSAS Storm and Precip Data xlsx file contains the current and past 8 seasons of CSAS winter storm data, including:
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See our Current Conditions for the latest hourly data. All times shown are in Mountain Standard Time (MST)
Winter 2012-2013 Storm #22: May 6-7, 2013:
Storm precip began between 0400-0500 hrs MST Monday May 6 (DOY 126)
Storm precipitation ended: 0400 hrs the next morning
Storm duration = 24 hrs
Storm total water content at SASP = 12 mm (0.47 inches)
Mean Precip intensity: 0.5 mm/hr
Max Precip intensity: 3mm/hr from 1100-1200 hrs
Max gain in snow depth at SASP during storm = 10 cm (4 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 153 cm (6 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #21: April 17-18, 2013: (preceded by and including Dust-on-Snow Event #8)
Storm precip began between 0400-0500 hrs MST Wednesday April 17 (DOY 107)
Storm precipitation ended: 0200 hrs the next day
Storm duration = 22 hrs
Storm total water content at SASP = 16 mm (0.63 inches)
Mean Precip intensity: 0.73 mm/hr
Max Precip intensity: 3mm/hr from 1600-1700 hrs
Max gain in snow depth at SASP during storm = 21 cm (8.3 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 13 cm (5.1 inches) of snow
Wind behavior at PTSP: Winds switched from southwesterly to northerly at noon.
Winter 2012-2013 Storm #20: April 14, 2013: (included Dust-on-Snow Event #7)
Storm precip began between 2400-0100 hrs MST April 14 (DOY 104)
Storm precipitation ended: 0900 hrs on the same day
Storm duration = 9 hrs
Storm total water content at SASP = 27mm (1.1 inches)
Mean Precip intensity: 3.0 mm/hr
Max Precip intensity: 4mm/hr from 0300-0400 hrs and again from 0600-0800 hrs
Max gain in snow depth at SASP during storm = 29 cm (11.4 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 10 cm (3.9 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #19: April 8-9, 2013: (included Dust-on-Snow Event #6)
Storm precip began between 1100-1200 hrs MST April 8 (DOY 98)
Storm precipitation ended: 1700 hrs April 9 (DOY 99)
Storm duration = 30 hrs
Storm total water content at SASP = 30mm (1.18 inches)
Mean Precip intensity: 1.0 mm/hr
Max Precip intensity: 3mm/hr from 2100-2200 hrs on April 8 (DOY 89)
Max gain in snow depth at SASP during storm = 30 cm (11.8 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 25 cm (9.84 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #18: March 20-21: (included Dust-on-Snow Event #5)
Storm precip began between 1700-1800 hrs MST March 20th (DOY 79)
Storm precipitation ended: 1300 hrs March 21st (DOY 80)
Storm duration = 20 hrs
Storm total water content at SASP = 12mm (0.5 inches)
Mean Precip intensity: 0.6 mm/hr
Max Precip intensity: 2mm/hr from 0500-0700 hrs on March 21st (DOY 80)
Max gain in snow depth at SASP during storm = 20 cm (7.9 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 21 cm (8.3 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #17: March 8-10, 2013:
Storm precip began between 1000-1100 hrs MST Friday, March 8 (DOY 67)
Storm precipitation ended: 0400 hrs Sunday, March 10th (DOY 69)
Storm duration = 42 hrs
Storm total water content at SASP = 19mm (0.75 inches)
Mean Precip Intensity: 0.45 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour on March 8 (DOY 67) between 1300-1400 hrs
and again between 1800-1900 hrs
Max gain in snow depth at SASP during storm = 19 cm (7.5 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 19 cm (7.5 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #16: March 3-4, 2013:
Storm precip began between 1700-1800 hrs MST Sunday, March 3rd (DOY 62)
Storm precipitation ended: 1900 hrs Monday, March 4th (DOY 63)
Storm duration = 26 hrs
Storm total water content at SASP = 23mm (0.9 inches)
Mean Precip Intensity: 0.88 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour during 4 separate hours throughout the storm
Max gain in snow depth at SASP during storm = 24 cm (9.4 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 18 cm (7.1 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #15: February 26, 2013:
Storm precip began between 0700-0800 hrs MST Tuesday, Feb 26 (DOY 57)
Storm precipitation ended: 2000 hrs same day
Storm duration = 13 hrs
Storm total water content at SASP = 17mm (0.67inches)
Mean Precip Intensity: 1.31 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour between 0900 and 1000 hours near start of storm
Max gain in snow depth at SASP during storm = 15 cm (5.9 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 7 cm (2.75 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #14: February 20-22, 2013:
Storm precip began between 0900-1000 hrs MST Wednesday, Feb 20
Storm precipitation ended: 1600 hrs MST, Friday Feb 22
Storm duration = 54 hrs
Storm total water content at SASP = 21mm (0.83inches)
Mean Precip Intensity: .38 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour between 1800 and 1900 hours on Thursday Feb 21st (DOY 52)
Max gain in snow depth at SASP during storm = 17 cm (6.7 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 35 cm (13.8 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #13: February 8-10, 2013:
Storm precip began between 0400-0500 hrs MST Friday, Feb 8
Storm precipitation ended: 0400 hrs MST, Sunday Feb 10
Storm duration = 48 hrs
Storm total water content at SASP = 27mm (1.1 inches)
Mean Precip Intensity: .56 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour between 0700-0800 hrs on Saturday Feb 9
Max gain in snow depth at SASP during storm = 23 cm (9.1 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 17 cm (6.7 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #12: January 30-31, 2013:
Storm precip began between 1300-1400 hrs MST Wednesday, Jan 30
Storm precipitation ended: 0500 hrs MST, Thursday Jan 31
Storm duration = 16 hrs
Storm total water content at SASP = 14mm (0.55 inches)
Mean Precip Intensity: 0.9 mm/hr
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in snow depth at SASP during storm = 19 cm (7.5 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 17 cm (6.7 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #11: January 27-29, 2013:
Storm precip began between 1900-2000 hrs MST Sunday, Jan 27
Storm precipitation ended: 0700 hrs MST, Tuesday Jan 29
Storm duration = 36 hrs
Storm total water content at SASP = 25mm (1 inch)
Mean Precip Intensity: 0.7 mm/hr (.03 inches/hour)
Max 1 Hour Precip Intensity = 3 mm/hour between 2200 hrs and 2300 hrs on Jan 27
Max gain in snow depth at SASP during storm = 26 cm (10.2 inches) of snow
Max gain in snow depth at SBSP during storm (wind affected) = 18 cm (7 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #10: January 26-27, 2013:
Storm precip began between 0900-1000 hrs MST Saturday, Jan 26
Storm precipitation ended: 1200 hrs MST, Sunday Jan 27
Storm duration = 27 hrs
Storm total water content at SASP = 31mm (1.2 inches)
Mean Precip Intensity: 1.15 mm/hr (.05 inches/hour)
Max 1 Hour Precip Intensity = 3 mm/hour 1600 hrs on Jan 26 and 1100 hrs on Jan 27
Max gain in snow depth at SASP during storm = 32 cm (12.6 inches) of snow
Max gain in snow depth at SBSP during storm = 27 cm (10.6 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #9: January 10-11, 2013
Storm precip began between 1600-1700 hrs MST Thursday, Jan 10
Storm precipitation ended: 1400 hrs MST, Friday Jan 11
Storm duration = 22 hrs
Storm total water content at SASP = 25mm (0.98 inches)
Mean Precip Intensity: 1.14 mm/hr (.04 inches/hour)
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in snow depth at SASP during storm = 37 cm (14.6 inches) of snow
Max gain in snow depth at SBSP during storm = 29 cm (11.4 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #8: December 26-28, 2012
Storm precip began between 0600-0700 hrs MST Wednesday, Dec 26 (DOY 361)
Storm precipitation ended: 1200 hrs MST, Friday Dec 28 (DOY 363)
Storm duration = 54 hrs
Storm total water content at SASP = 13mm (0.5 inches) all as snow
Mean Precip Intensity: 0.2 mm/hr (<.01 inches/hour)
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in snow depth at SASP during storm = 5 cm (2 inches) of snow
Max gain in snow depth at SBSP during storm = 4 cm (1.6 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #7: December 24, 2012
Storm precip began between 2400-0100 hrs MST Monday, Dec 24 (DOY 359)
Storm precipitation ended: 0700 hrs MST, Tuesday Dec 25 (DOY 360)
Storm duration = 31 hrs
Storm total water content at SASP = 12mm (0.5 inches) all as snow
Mean Precip Intensity: 0.4 mm/hr (.01 inches/hour)
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in snow depth at SASP during storm = 19 cm (7.5 inches) of snow
Max gain in snow depth at SBSP during storm = 11 cm (4.3 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #6: December 18-19, 2012
Storm precip began between 2200-2300 hrs MST Tuesday, Dec 18 (DOY 353)
Storm precipitation ended: 1900 hrs MST, Wednesday Dec 19 (DOY 354)
Storm duration = 21 hrs
Storm total water content at SASP = 15mm (0.6 inches) all as snow
Mean Precip Intensity: 0.7 mm/hr (.03 inches/hour)
Max 1 Hour Precip Intensity = 3 mm/hour between 0200-0300 on Dec 19
Max gain in snow depth at SASP during storm = 15 cm (5.9 inches) of snow
Max gain in snow depth at SBSP during storm = 5 cm (2 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #5: December 15-17, 2012
Storm precip began between 0500-0600 hrs MST Saturday, Dec 15 (DOY 350)
Storm precipitation ended: 0900 hrs MST, Monday Dec 17 (DOY 352)
Storm duration = 52 hrs
Storm total water content at SASP = 13mm (0.5 inches) all as snow
Mean Precip Intensity: 0.25 mm/hr (.01 inches/hour)
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in snow depth at SASP during storm = 4cm (1.6 inches) of snow
Max gain in snow depth at SBSP during storm = 7cm (2.8 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #4: December 14, 2012
Storm precip began between 0600-0700 hrs MST Friday, Dec 14 (DOY 349)
Storm precipitation ended: 2300 hrs MST, Dec 14 (DOY 349)
Storm duration = 17 hrs
Storm total water content at SASP = 14mm (0.55 inches) all as snow
Mean Precip Intensity: 0.82 mm/hr (.02 inch/hour)
Max 1 Hour Precip Intensity = 2 mm/hour during hours ending at 0800 and 1000
Max gain in snow depth at SASP during storm = 20cm (7.9 inches) of snow
Max gain in snow depth at SBSP during storm = 17cm (6.7 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #3: December 10-11, 2012
Storm precip began: 1000 hrs MST Monday, Dec 10 (DOY 345)
Storm precipitation ended: 0700 hrs MST, Dec 11 (DOY 346)
Storm duration = 21 hrs
Storm total water content at SASP = 14mm (0.55 inches) all as snow
Mean Precip Intensity: 0.67 mm/hr (.02 inch/hour)
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in snow depth at SASP during storm = 14cm (5.5 inches) of snow
Max gain in snow depth at SBSP during storm = 4cm (1.6 inches) of snow
Wind behavior at PTSP:
Winter 2012-2013 Storm #2: December 9, 2012
Storm precip began: 0300 hrs MST Sunday, Dec 9 (DOY 344)
Storm precipitation ended: 1600 hrs MST
Storm duration = 13 hrs
Storm total water content at SASP = 12mm (0.47 inches) all as snow
Mean Precip Intensity: 0.86 mm/hr
(.03 inch/hour)
Max 1 Hour Precip Intensity = 3 mm/hour between 0700 - 0800 hrs
Max gain in snow depth at SASP during storm = 12cm (4.7 inches) of snow
Max gain in snow depth at SBSP during storm = 5cm (2 inches) of snow
Wind behavior at PTSP: NNW Winds gusted to 45mph, much lower wind speeds than experienced during our 1st winter storm last month.
Winter 2012-2013 Storm #1: November 9-10, 2012
Storm precip began: 0200 hrs MST Friday, Nov 9 (DOY 314)
Storm precipitation ended: 1300 hrs MST, Saturday, Nov 10 (DOY 315)
Storm duration = 35 hrs
Storm total water content at SASP = 45mm (1.77 inches) all as snow
Mean Precip Intensity: 1.29 mm/hr
(.05 inch/hour)
Max 1 Hour Precip Intensity = 3 mm/hour between 0200 - 0400 hrs on DOY 315 (Nov 10, 2012)
Max gain in snow depth at SASP during storm = 40cm (16 inches) of snow
Max gain in snow depth at SBSP during storm = 31cm (12 inches) of snow
Wind behavior at PTSP: SW'ly winds were fairly ferocious throughout this storm, averaging 30 mph and gusting to 82 mph, leaving a lot of terrain wind stripped back down to bare ground.
Winter 2011-2012 Storm #23: April 26-27, 2012
Storm precip began: 1500 hrs MST April 26 (DOY 117)
Storm precip ended: 1000 hrs MST April 27 (DOY 118)
Storm Duration = 19 hrs
Storm total HNW at SASP = 13 mm (0.51 in)
Mean Precip Intensity =0.68 mm/hr
Max 1 Hour Precip Intensity = 4 mm/hour between 1700 - 1800 hrs
Max gain in HS at SASP during storm = 9 cm (3.5 in)
Max gain in HS at SBSP during storm = 21 cm (8.3 in)
Peak gust at PTSP during storm: 23.7 ms (53 mph) @ 0511 hrs; wind rose for storm
Winter Storm #22: April 19-20, 2012
Storm precip began: 0500 hrs MST April 19 (DOY 110)
Storm precip ended: 0200 hrs MST April 20 (DOY 111)
Storm Duration = 21 hrs
Storm total HNW at SASP = 19 mm (0.75 in)
Mean Precip Intensity =0.9 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour between 0600 - 0700
Max gain in HS at SASP during storm = 13 cm (5.1 in)
Max gain in HS at SBSP during storm = 12 cm (4.7 in)
Peak gust at PTSP during storm: 16.1 ms (36.1 mph) @ 1719 hrs on April 19; wind rose for storm
Winter Storm #21: April 13-16, 2012
Storm precip began: 1600 hrs MST April 13 (DOY 104)
Storm precip ended: 0700 hrs MST April 16 (DOY 107)
Storm Duration = 63 hrs
Storm total HNW at SASP = 31 mm (1.2 in)
Mean Precip Intensity =0.5 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 31 cm (12.2 in)
Max gain in HS at SBSP during storm = 39 cm (15.35 in)
Peak gust at PTSP during storm: 22.8 ms (50.9 mph) @ 0818 hrs on April 14; wind rose for storm
Winter Storm #20: March 17-20, 2012
Storm precip began: 2000 hrs MST March 17 (DOY 77)
Storm precip ended: 0500 hrs MST March 20 (DOY 80)
Storm Duration = 57 hrs
Storm total HNW at SASP = 39 mm (1.5 in)
Mean Precip Intensity =0.68 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour at 1300, 1600 and 1700 on March 18th.
Max gain in HS at SASP during storm = 35 cm (13.8 in)
Max gain in HS at SBSP during storm = 36 cm (14 in)
Peak gust at PTSP during storm: 41 ms (91.7 mph) @1240 hrs; wind rose for storm
Winter Storm #19: March 1-2, 2012
Storm precip began: 1000 hrs MST March 1 (DOY 61)
Storm precip ended: 1900 hrs MST March 2 (DOY 62)
Storm Duration = 33 hrs
Storm total HNW at SASP = 19 mm (0.75 in)
Mean Precip Intensity = 0.58 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 11 cm (4.3 in)
Max gain in HS at SBSP during storm = 3 cm (1.2 in)
Peak gust at PTSP during storm: 26.5 ms (59.3 mph) @1410 hrs; wind rose for storm
Winter Storm #18: February 27-28, 2012
Storm precip began: 1800 hrs MST Feb 19 (DOY 58)
Storm precip ended: 1300 hrs MST Feb 20 (DOY 59)
Storm Duration = 19 hrs
Storm total HNW at SASP = 32 mm (1.26 in)
Mean Precip Intensity = 1.68 mm/hr
Max 1 Hour Precip Intensity = 4 mm/hour
Max gain in HS at SASP during storm = 38 cm (15 in)
Max gain in HS at SBSP during storm = 26 cm (10.2 in)
Peak gust at PTSP during storm: 35.6 ms (79.6 mph) @ 0120 hrs; wind rose for storm
Winter Storm #17: February 19-20, 2012
Storm precip began: 1300 hrs MST Feb 19 (DOY 50)
Storm precip ended: 1500 hrs MST Feb 20 (DOY 51)
Storm Duration = 26 hrs
Storm total HNW at SASP = 17 mm (0.67 in)
Mean Precip Intensity = 0.65 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour @ 2100 hrs on Feb 19
Max gain in HS at SASP during storm = 12 cm (4.7 in)
Max gain in HS at SBSP during storm = 8 cm (3.15 in)
Peak gust at PTSP during storm: 21.5 ms (48.1 mph) @ 1842 hrs; wind rose for storm
Winter Storm #16: February 12, 2012
Storm precip began: 0300 hrs MST Feb 12 (DOY 43)
Storm precip ended: 1100 hrs MST Feb 13 (DOY 44)
Storm Duration = 32hrs
Storm total HNW at SASP = 30mm (1.2 in)
Mean Precip Intensity = 0.94 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour between 0600 and 0700 on Feb 12
Max gain in HS at SASP during storm = 37 cm (14.6 in)
Max gain in HS at SBSP during storm = 34 cm (13.4 in)
Peak gust at PTSP during storm: 18.6 ms (41.6 mph) @ 2341hrs; wind rose for storm
Winter Storm #15: February 8-9, 2012
Storm precip began: 1400 hrs MST Feb 5
Storm precip ended: 1900 hrs MST Feb 6
Storm Duration = 29hrs
Storm total HNW at SASP = 18mm (0.7 in)
Mean Precip Intensity = 0.62 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 29 cm (11.4 in)
Max gain in HS at SBSP during storm = 22 cm (8.7 in)
Peak gust at PTSP during storm: 22.3 ms (49.9 mph) @ 1819hrs during the last hour of precip;
wind rose for storm
Winter Storm #14: February 5-6, 2012
Storm precip began: 1900 hrs MST Feb 5
Storm precip ended: 1900 hrs MST Feb 6
Storm Duration = 24hrs
Storm total HNW at SASP = 14mm (0.55 in)
Mean Precip Intensity = 0.58 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour @ 1500 on Feb 6
Max gain in HS at SASP during storm = 17 cm (6.7 in)
Max gain in HS at SBSP during storm = 17 cm (6.7 in)
Peak gust at PTSP during storm: 11.8 ms (26.4 mph) @ 2049hrs; wind rose for storm
Winter Storm #13: January 26 - 27, 2012
Storm precip began: 2000 hrs MST Jan 26
Storm precip ended: 1000 hrs MST Jan 27
Storm Duration = 14hrs
Storm total HNW at SASP = 18mm (0.7 in)
Mean Precip Intensity = 1.29 mm/hr
Max 1 Hour Precip Intensity = 4 mm/hour @ 0300 and 0400 on Jan 27
Max gain in HS at SASP during storm = 20 cm (7.9 in)
Max gain in HS at SBSP during storm = 19 cm (7.5 in)
Peak gust at PTSP during storm: 24.7 ms (55 mph) @ 0200 hrs; wind rose for storm
Winter Storm #12: January 21-22, 2012
Storm precip began: 1100 hrs MST Jan 21
Storm precip ended: 1400 hrs MST Jan 22
Storm Duration = 27hrs
Storm total HNW at SASP = 44mm (1.7 in)
Mean Precip Intensity = 1.63 mm/hr
Max 1 Hour Precip Intensity = 4 mm/hour
Max gain in HS at SASP during storm = 54 cm (21 in)
Max gain in HS at SBSP during storm = 25 cm (10 in)
Peak gust at PTSP during storm: 28.1 ms (63 mph); wind rose for storm
Winter Storm #11: January 15-16,2012
Storm precip began: 2100 hrs MST Jan 15
Storm precip ended: 2300 hrs MST Jan 16
Storm Duration = 26 hrs
Storm total HNW at SASP = 18mm (0.7 in)
Mean Precip Intensity = 0.69 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 30 cm (12 in)
Max gain in HS at SBSP during storm = 11 cm (4 in)
Peak gust at PTSP during storm: 29.1 ms (65 mph); wind rose for storm
Winter Storm #10: December 12-14, 2011
Storm precip began: 1700 hrs MST Monday, Dec 12 (DOY 346)
Storm precip ended: 1700 hrs MST Wednesday, Dec 14 (DOY 348)
Storm Duration = 48 hrs
Storm total HNW at SASP = 36mm (1.4 in)
Mean Precip Intensity = 0.75 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 46 cm (18.1 in)
Max gain in HS at SBSP during storm = 48 cm (18.9 in)
Peak gust at PTSP during storm: 67.3 ms (150.5 mph) on Dec 12 (DOY 346) at 2313 hrs; wind rose for storm
Winter Storm #9: December 2-5, 2011
Storm precip began: 1500 hrs MST Friday, Dec 2 (DOY 336)
Storm precip ended: 0300 hrs MST Monday, Dec 5 (DOY 339)
Storm Duration = 60 hrs
Storm total HNW at SASP = 19mm (.75 in)
Mean Precip Intensity = 0.32 mm/hr
Max 1 Hour Precip Intensity = 3 mm/hour 1600-1700 on Dec 3 (DOY 337)
Max gain in HS at SASP during storm = 18 cm (7.1 in)
Max gain in HS at SBSP during storm = 17 cm (6.7 in)
Peak gust at PTSP during storm: 12.8 ms (28.5 mph) on Dec 4 (DOY 338) at 2356 hrs; wind rose for storm
Winter Storm #8: Nov 24-25, 2011
Our primary Swamp Angel datalogger malfunctioned early Thanksgiving morning. As a result, the following storm data is estimated from the Red Mountain Snotel, our SASP height of snow measurements, RH measurements at SASP, and a storm board at SASP.
Storm precip began: ~1800 hrs MST Thanksgiving Thursday, Nov 24 (DOY 328)
Storm precip ended approximately: 1600 hrs MST Friday, Nov 25 (DOY 329)
Storm Duration = ~29 hrs
Storm total HNW at SASP = ~13mm (.5 in)
Mean Precip Intensity = ~0.45 mm/hr
Max 1 Hour Precip Intensity = ~1 mm/hour
Max gain in HS at SASP during storm = 8.7 cm (3.4 in)
Max gain in HS at SBSP during storm = 3 cm (1.2 in)
Wind rose for storm
Winter Storm #7: Nov 20-22, 2011
An errant pine needle made it through filters on our precip gauge and caused slushing and delayed precip measurements during this storm. The good news is that the gauge reported the correct total for the storm, though the hours might be skewed later. We are calling the end of this storm 0600 this morning (Tues Nov 22, DOY 326), based on height of snow data.
Storm precip began: 1900 hrs MST Sunday, Nov 20 (DOY 324)
Storm precip ended approximately: 0600 hrs MST Tuesday, Nov 22 (DOY 326)
Storm Duration = 35 hrs (approx)
Storm total HNW at SASP = 16mm (0.6 in)
Mean Precip Intensity = 0.46 mm/hr
Max 1 Hour Precip Intensity = 1 mm/hour
Max gain in HS at SASP during storm = 19 cm (7.5 in)
Max gain in HS at SBSP during storm = 11 cm (4.3 in)
Wind Behavior at PTSP: Average winds measured 5.5m/s (12 mph), and only barely exceeded an hourly average of 8m/s during 3 separate hours early in the storm. The peak gust measuring 31.6m/s (71mph) came at 0138 on Monday Nov 21 (DOY325). Winds came from the south early in the storm until 0900 on Monday when they swung to the SW. At 1400 Monday, winds turned to the NW. Wind rose for storm
Winter Storm #6: Nov 13, 2011
We got a 12 hour storm producing exactly 12mm of water with a 12cm increase in height of snow (but it occurred on the 13th, not the 12th).
Storm precip began: 1000 hrs MST Sunday, Nov 13 (DOY 317)
Storm precip ended: 2200 hrs MST Sunday, Nov 13 (DOY 317)
Storm Duration = 12 hrs
Storm total HNW at SASP = 212mm (.47 in)
Mean Precip Intensity = 1 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour at 1400
Max gain in HS at SASP during storm = 12 cm (4.7 in)
Max gain in HS at SBSP during storm = 4 cm (1.57 in)
Wind Behavior at PTSP: Winds came from the WSW for the first 7 hours, turning slightly to the WNW at 1700. Wind speeds averaged 12.6m/s (28 mph) for the duration of the storm, with a peak gust of 26.5m/s (59 mph) at 1012 Sunday Nov 13th. Wind rose for storm
Winter Storm #5: Nov 4-6, 2011
This storm got off to a slow start, with several hours (1700-2300) in between the first few small batches of precip. However, we experienced very high precip intensities early Saturday morning, November 5th (DOY 309).
Storm precip began: 1300 hrs MST Friday, Nov 4 (DOY 308)
Storm precip ended: 0900 hrs MST Saturday, Nov 6 (DOY 309)
Storm Duration = 20 hrs
Storm total HNW at SASP = 26mm (1 in)
Mean Precip Intensity = 1.3 mm/hr
Max 1 Hour Precip Intensity = 6 mm/hour at 0600 Sat Nov 5 (DOY 309)
Max gain in HS at SASP during storm = 44 cm (17.3 in)
Max gain in HS at SBSP during storm = 33 cm (13 in)
Wind Behavior at PTSP: Winds came steadily from the South (mean 176°, std dev'n 13°), and exceeded 8m/s throughout the storm, gusting as high as 34.1 m/s (76 mph) at 1:34 MST Saturday. Wind rose for storm
Winter Storm #4: Nov 1-2, 2011
We currently have about 23cm (9") of snow on the ground at both our subalpine (SASP) and alpine (SBSP) sites. The skies mostly cleared over Silverton around 10am Wednesday (Nov 2, DOY 306), though a bit more precip occured at our study plots afterwards.
Storm precip began: 2000 hrs MST Tuesday, Nov 1 (DOY 305)
Storm precip ended: 1600 hrs MST Wednesday, Nov 2 (DOY 306)
Storm Duration = 20 hrs
Storm total HNW at SASP = 14 mm (.55 in)
Mean Precip Intensity = 0.7 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 16 cm (6.3 in)
Max gain in HS at SBSP during storm = 18 cm (7 in)
Wind behavior at PTSP: Mean speeds exceeded 8m/s only between 0400 and 0900 MST Wednesday morning Nov 2nd [DOY 306], averaging 10.6 m/s (23.7 mph) during that time. The storm's peak gust of 16.1m/s (36mph) occurred at 0610. During the first few hours of the storm, winds came from the WWS, but turned to the N around 0200 MST Wednesday. Wind speeds decreased and swung back to the SW during the last few hours of the storm.
Wind rose for storm
Winter Storm #3: Oct 25-26, 2011
The sun has come out in Silverton after our 3rd winter storm this season. As it happened, snow cover from storms #1 and #2 persisted through nearly 2 weeks of sunny fall days.
Storm precip began: 0600 hrs MST Tuesday, Oct 25 (DOY 298)
Storm precip ended: 1500 hrs MST Wednesday, October 26 (DOY 299)
Storm Duration = 33 hrs
Storm total HNW at SASP = 27 mm
Mean Precip Intensity = 0.8 mm/hr
Max 1 Hour Precip Intensity = 2 mm/hour
Max gain in HS at SASP during storm = 22 cm (8.66 in)
Max gain in HS at SBSP during storm = 18 cm
Wind behavior at PTSP: Winds during this storm came from the SW and swung to the North only as precip ended. Mean speeds exceeded 8m/s during only 3 scattered hours. The storm's peak gust of 19.2m/s (43mph) occurred at 0344 MST early Wednesday, Oct 26th. Wind rose for storm
Winter Storm #2: Oct 5-6, 2011
Storm precip began: 1600 hrs MST Wednesday, Oct 5 (DOY 278)
Storm precip ended: 1400 hrs MST Thursday, October 6
Storm Duration = 22 hrs
Storm total HNW at SASP = 50 mm
Mean Precip Intensity = 2.3 mm/hr
Max 1 Hour Precip Intensity = 6 mm/hour at 1000 MST Thursday
Max gain in HS at SASP during storm = 39 cm (15.3 in)
Max gain in HS at SBSP during storm = 31.4 cm (12.4 in)
Wind behavior at PTSP: This was a windy storm with average winds of 15m/s (33mph) out of the South (avg 194deg) during the storm. The max wind gust of a whopping 38.1m/s (85.2mph) occurred at 0755 on Thurs Oct 6th. Silverton (and Ouray/Telluride?) experienced a ~4hr power outage shortly afterwards. Wind rose for storm
Winter Storm #1: Oct 4-5, 2011
** This storm was a mix of rain and snow below treeline
Storm precip began: 0700 hrs MST Tuesday, Oct 4 (DOY 277)
Storm precip ended: 0100 hrs MST Wednesday, October 5
Storm Duration = 18 hrs
Storm total HNW at SASP = 17 mm
Mean Precip Intensity = 0.94 mm/hr
Max 1 Hour Precip Intensity = 5 mm/hour at 1200 MST Tuesday
Max gain in HS at SASP during storm = 1.6 cm (.63 in)
Max gain in HS at SBSP during storm = 10.3 cm (4 in)
Wind behavior at PTSP: The average winds were only 4.15m/s (9.3mph), and generally came out of the SE (avg 170deg). The max wind gust occurred early Wednesday a.m. during the last hour of the storm 9.7m/s (21.7mph).
Wind rose for storm
Winter 11/12 Pre-Season Storm. We received snow Sept 15-17, but it was gone by Sept 20th. The storm brought 38mm of water, resulting in a max height of snow of 15cm (6in) at SBSP and 8cm (3in) at SASP.
Storms from this and previous seasons (xlsx file)
