Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >
Summary | Snowfall Totals |Strongest Winds | Bitter Cold Info |Reporting Snowfall | Safety
After a warm start to fall, winter arrived overnight Sunday night into Monday, and brought widespread snow and cold across the Cowboy State. After a warm and at times, breezy weekend, a sharp arctic cold front brought cold and wintry conditions early Monday morning, with moderate to heavy snow experienced across many areas. Most areas had their daily high temperatures occur after midnight on Monday, with temperatures dipping into the single digits to teens by Monday night. A brief lull in snowfall was seen Monday night, before another front brought more snow and cold overnight Monday night into Veteran's Day. Although snow ended Tuesday afternoon and evening, bitterly cold temperatures remained across the region Wednesday. The low of 27 below zero at Casper Airport Wednesday evening not only set a daily record low, but is the coldest temperature ever recorded for Casper in the month of November. The previous record was 21 below zero on November 23, 1985. This bitter cold low also set a record low so early in the season. The soonest Casper reached 27 below zero previously was on December 5, 1972. Climate data for Casper goes back to 1939. These temperatures are about 50 degrees below normal!
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| A composite radar loop starting at 145 AM and ending at 8 AM, Monday morning November 10th. Notice the moderate to heavy snow that develops from the Wind River Basin to Casper as the cold front pushes southward. - Click to Enlarge |
A loop of hourly temperatures starting at 5 PM Sunday, November 9th, and ending at 8 AM. Notice how in 15 hours or less some areas have a 40 to 50 degree temperature change! - Click to Enlarge |
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| Traffic backed up in the westbound lane of Interstate 80 just east of Rock Springs due to accidents caused by the very slick road conditions. Photo Courtesy of WYDOT |
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| County | Location | Wind Gust (mph) | Date/Time |
|---|---|---|---|
| Park | 5 WNW Clark | 84 | 224 PM 11/09 |
| Park | Chief Joseph HWY (Dead Indian Pass) | 70 | 1050 AM 11/09 |
| Big Horn | Greybull Airport | 66 | 124 AM 11/10 |
| Natrona | 16 S Hiland | 64 | 310 PM 11/09 |
| Fremont | Red Canyon - HWY 28 | 63 | 735 PM 11/09 |
| Park | 8 S Clark - HWY 120 | 63 | 230 PM 11/09 |
| Johnson | Buffalo Airport | 60 | 257 AM 11/10 |
| Natrona | Casper - Outer Drive | 59 | 1026 AM 11/09 |
| Park | 8 N Meeteetse | 57 | 1246 AM 11/10 |
| Sweetwater | Interstate 80 - MM 142 | 57 | 400 AM 11/10 |
| Sweetwater | Farson | 55 | 255 AM 11/10 |
| Park | Powell Airport | 54 | 115 AM 11/10 |
| Lincoln | Kemmerer Airport | 52 | 240 AM 11/10 |
| Fremont | Lander Airport | 49 | 243 AM 11/10 |
| Fremont | Riverton Airport | 49 | 433 AM 11/10 |
| Sublette | Big Piney Airport | 49 | 827 PM 11/09 |
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Many areas saw a temperature change of 46 to 56 degrees in less than 24 hours as an arctic front blasted through the state. See the table above for details at select locations. |
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