Severe Thunderstorm and Heavy Rainfall Potential Continues

A low pressure center tracking across the Great Lakes and its associated cold front extending across the Southern Plains will focus occasional showers and thunderstorms through tonight. A few of these thunderstorms may become severe alongside heavy rainfall that may cause flash flooding; Portions of the Southern Plains would be the greatest threat for these hazards through tonight. Read More >

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Event Summary | Rainfall Totals | Monitoring & Reporting |


Shelf cloud over Green River courtesy of Eric Nielsen	Star Valley - Photo Courtesy of Dave Hunt

A large storm system moved across the western United States this weekend, depositing a significant amount of rain as it slowly moved northeast. Rain began affecting our western border with Idaho as early as Friday, with rain eventually moving east of the Divide on Saturday with waves of rain and embedded thunderstorms moving across the region through Monday.

Click Loop To Enlarge

The GOES-W Water Vapor Satellite Loop (Above) showed a large upper level low pressure system spinning atop much of the western United States throughout the weekend before it finally lifted out on Monday.

Click here to see the full set of observed rainfall totals (Friday Afternoon - Monday Night)

All stations listed below accumulated more than one inch of rain over the 72 hour period ending Monday night (Sept 29th).

**72 Hour Rainfall Totals 1 Inch or Greater**
Location	County, ST	Elev	72 Hr Pcpn (in.)
N. FORK LITTLE WIND RIVER	Fremont, WY	6120	4.09
PINE CREEK ABOVE FREMONT LAKE	Sublette, WY	7480	3.96
PORTABLE RAWS	Sublette, WY	8503	3.02
4.9 SSE SMOOT	Lincoln, WY	NA	3.00
15.6 WNW DANIEL	Sublette, WY	NA	3.00
21 W BIG PINEY	Sublette, WY	7480	2.98
3.3 SW AFTON	Lincoln, WY	NA	2.91
PINEDALE	Sublette, WY	7310	2.87
KEMMERER	Lincoln, WY	6980	2.80
DARWIN RANCH	Teton, WY	NA	2.78
FOSSIL BUTTE	Lincoln, WY	6780	2.78
20.5 NNW KEMMERER	Lincoln, WY	NA	2.77
15 NE COKEVILLE	Lincoln, WY	8470	2.70
DANIEL FISH HATCHERY COOP	Sublette, WY	NA	2.61
9 E BIG PINEY	Sublette, WY	6803	2.55
AFTON - COOP	Lincoln, WY	NA	2.55
13 E COKEVILLE	Lincoln, WY	7460	2.55
BONDURANT	Sublette, WY	6687	2.47
10 NNW DANIEL	Sublette, WY	7470	2.46
13.8 NW PINEDALE	Sublette, WY	NA	2.46
4.7 NNE THAYNE	Lincoln, WY	NA	2.45
BEDFORD - COOP	Lincoln, WY	NA	2.42
SMITHS FORK NEAR BORDER	Lincoln, WY	6650	2.40
7 NE PINEDALE	Sublette, WY	8530	2.39
STAR VALLEY RANCH 0.3 WNW	Lincoln, WY	NA	2.38
BONDURANT	Sublette, WY	6650	2.38
2 NW BONDURANT	Sublette, WY	6726	2.34
1.5 SE THAYNE	Lincoln, WY	NA	2.31
7.6 NNW ROCK SPRINGS	Sweetwater, WY	NA	2.23
2.6 SSW WILSON	Teton, WY	NA	2.19
AFTON	Lincoln, WY	6267	2.11
PORTABLE RAWS	Sublette, WY	8378	2.07
13 SE PINEDALE	Sublette, WY	NA	2.04
MIDDLE FORK POPO AGIE RIVER	Fremont, WY	6555	2.00
COKEVILLE	Lincoln, WY	6191	1.93
BOULDER REARING STATION COOP	Sublette, WY	NA	1.99
10 W FORT WASHAKIE	Fremont, WY	9235	1.90
4 W MILFORD	Fremont, WY	6042	1.89
BOULDER LAKE	Sublette, WY	7350	1.84
NORTH FORK POPO AGIE RIVER	Fremont, WY	5760	1.81
1.6 NE TETON VILLAGE	Teton, WY	NA	1.80
CROWHEART	Fremont, WY	6099	1.71
5.3 JACKSON	Teton, WY	NA	1.70
11 N DUBOIS	Fremont, WY	8750	1.70
13 W CROWHEART	Fremont, WY	9630	1.70
N WIND RIVER MTS	Fremont, WY	8833	1.69
JACKSON	Teton, WY	6240	1.64
THAYNE	Fremont, WY	5928	1.64
1.2 WNW LANDER	Fremont, WY	NA	1.63
0.9 W LANDER	Fremont, WY	NA	1.62
LANDER AIRPORT	Fremont, WY	5586	1.61
10 SE CROWHEART	Fremont, WY	5654	1.60
9 SW LANDER	Fremont, WY	7085	1.60
11 W CROWHEART	Fremont, WY	6520	1.56
14 WSW MAMMOTH	Park, WY	7900	1.55
Lander	Fremont, WY	NA	1.55
3 NW ETNA	Lincoln, WY	6520	1.52
8 NNE MORAN JUNCTION	Teton, WY	7030	1.50
FARSON	Sweetwater, WY	NA	1.50
KIRWIN SNOTEL	Park, WY	9550	1.50
BURRIS	Fremont, WY	NA	1.46
7 NW LANDER	Fremont, WY	5797	1.45
BIG PINEY COOP	Sublette, WY	NA	1.45
1.1 SSE GREEN RIVER	Sweetwater, WY	NA	1.44
MOOSE - COOP	Teton, WY	NA	1.43
2 NNE LANDER	Fremont, WY	NA	1.42
6 S ALPINE	Lincoln, WY	5676	1.41
4 SW LANDER	Fremont, WY	5807	1.40
15 SE ROCK SPRINGS	Sweetwater, WY	7550	1.37
8.7 SSE LANDER	Fremont, WY	NA	1.36
ROCK SPRINGS	Sweetwater, WY	6270	1.36
4 NE THAYNE	Lincoln, WY	6217	1.35
ALTA	Teton, WY	6430	1.34
4 NE THAYNE	Lincoln, WY	NA	1.34
ETNA	Lincoln, WY	5823	1.34
9 SSE LANDER	Fremont, WY	NA	1.33
FLAMING GORGE BUCKBOARD MARINA	Sweetwater, WY	NA	1.30
GREEN RIVER	Sweetwater, WY	NA	1.30
0.6 W ROCK SPRINGS	Sweetwater, WY	NA	129
6.7 SSE LANDER	Fremont, WY	NA	1.29
MARBLETON	Sublette, WY	6896	1.29
HOBACK JUNCTION	Teton, WY	5928	1.27
6 SE LANDER	Fremont, WY	NA	1.26
0.9 S ROCK SPRINGS	Sweetwater, WY	NA	1.22
0.4 S MOOSE	Teton, WY	NA	1.21
4 N MOOSE	Teton, WY	6730	1.21
3 E FORT WASHAKIE	Fremont, WY	5528	1.21
GARDNER RIVER NR MAMMOTH, YELLOWSTONE NATIONAL PARK	Park, MT	5624	1.20
EXTREME SW YELLOWSTONE	Teton, WY	6400	1.19
9.7 WNW DUBOIS	Fremont, WY	NA	1.15
ROCK SPRINGS AIRPORT	Sweetwater, WY	6760	1.13
MAMMOTH	Park, WY	6300	1.13
0.4 S ROCK SPRINGS	Sweetwater, WY	NA	1.10
BECHLER RANGER STATION	Teton, WY	NA	1.10
DUBOIS	Fremont, WY	NA	1.10
12 NE JACKSON	Teton, WY	NA	1.09
HUDSON	Fremont, WY	NA	1.09
5 S OF SOUTH ENTRANCE YNP	Teton, WY	7020	1.07
SWEETWATER STATION	Fremont, WY	NA	1.06
SNAKE RIVER RANGER STATION	Teton, WY	NA	1.05
FREEDOM	Lincoln, WY	NA	1.02
OLD FAITHFUL	Teton, WY	7320	1.02
10 W DUBOIS	Fremont, WY	8432	1.01
4 W SOUTH ENTRANCE YNP	Teton, WY	NA	1.00
15 NNE GRAND TARGHEE	Teton, WY	6830	1.00

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Severe Thunderstorm and Heavy Rainfall Potential Continues

Significant Rain Across the State Sept 26-29