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> Halloween 2004 Winter Storm
Halloween Ushers in First
Widespread Snow of the Season
Snow began falling across western
Wyoming on Saturday, October 30. The moist autumn system provided
snowfall to the far west valleys and mountains as it pushed east.
Early Halloween morning this storm system pushed across the Continental
Divide accompanied by a
cold front. Upslope flow developed in the Fremont
and Natrona counties and portions of the Big Horn Basin as the cold front pushed south. This allowed
for persistent snowfall from Halloween morning into the evening hours.
Below are snowfall totals received by
WFO Riverton as of 7:50 p.m. Halloween.
|
Location |
Snowfall (inches) |
|
Yellowstone National Park |
|
Lewis Lake |
12 |
|
South Entrance |
7 |
| |
|
|
Teton County |
|
Rendezvous Peak - Raymer |
9 |
|
Jackson Hole - mid mountain |
6
to 7 |
|
Togwotee Pass |
3
to 4 |
|
Jackson Hole - base |
2 |
|
Jackson |
1 |
| |
|
|
Fremont County |
|
Lander |
4 |
|
Hudson |
3.5 |
|
Riverton |
2
to 3 |
|
Sweetwater Station |
2 |
|
Jeffrey City |
1
to 2 |
| |
|
|
Natrona County |
|
Casper Mountain |
9
to 10 |
|
Casper |
4
to 7 |
|
Arminto |
5 |
|
Hiland |
4 |
|
Hell's Half Acre |
3 |
|
Powder River |
2 |
|
Alcova |
Trace |
| |
|
|
Washakie County |
| 6
miles east of Ten Sleep |
6.5 |
|
Big Trails |
3
to 4 |
| |
|
|
Lincoln County |
|
Star Valley Ranch |
5 |
|
Smoot |
4.5 |
| 2
miles north of Kemmerer |
2 |
| |
|
|
Salt River Range |
|
Willow Creek SNOTEL |
11
to 12 |
|
Cottonwood Creek SNOTEL |
8
to 9 |
|
Blind Bull Summit |
7 |
| |
|
|
Wind River Mountains |
|
Deer Park SNOTEL |
7 |
|
South Pass SNOTEL |
5 |
|
Hobbs Park SNOTEL |
4 |
|
Townsend Creek SNOTEL |
4 |
| |
|
|
Bighorn Mountains |
|
Shell Creek SNOTEL |
6
to 7 |
|
Powder River Pass SNOTEL |
5 |
|
Bone Springs Divide SNOTEL |
4 |
| |
|
|
Green River Basin |
|
Boulder |
1 |
|
Pinedale |
1
or less |
|
SNOTEL
site - snowfall determined by weighted water equivalent and average
temperature |
In Riverton, Halloween has been the scene for some
extreme weather over the years. Below are some statistics
regarding historical data from the Riverton Cooperative site dating as far
back as 1907. Except for the average high and low, all data has been
updated to account for 2004. You will note that of the 98 Halloweens
documented, just slightly more than 1 in 5 see any precipitation.
Average High/Low 51/22
Record High 77 (1950)
Record Low -6 (1971)
Coldest High 17 (1971)
Warmest Low 47 (1933)
Most Snow Ever 7" (1928)
Greatest Snow Depth 18" (1971)
Most Precipitation 0.59"( 1928)
Days with Measurable Precipitation 16
Days with Any Precipitation 20
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