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Crook County Historical Floods
| DAMAGING FLOODS |
| Location | Start Date | Information |
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| South of Sundance, Miller Creek | 24-Jun-1959 | Storm moved down Miller Creek with hail stones to 4 inches in diameter. Some flash flooding from heavy rain. |
| Beuhla 21, Sand Creek | 21-Aug-1973 | A torrential rain caused flash flooding on Sand Creek, washing out some roads and damaging houses. Apparently a pickup truck and a trailer were also washed into a bridge abutment. |
| Oshoto, Sundance, Moskee | 13-Jun-1982 | A thunderstorm dumped up to 7 inches of rain throughout the southeastern part of Crook County along with hail drifts from two to five feet in some places. The hail ranged from pea size up to one inch in diameter and caused considerable damage. Losses included fences, corrals, water tanks, soil and stock. The major damage in the Moskee and Oshoto areas was due to flooding. |
| Moorcroft | 24-Jul-1982 | A thunderstorm dumped 2.3 inches of rain in a short period of time causing local flooding. It was also spawned a tornado and marble-size hail which left a path of destruction in the Buck Miller subdivision north of town and damaged crops in the area. |
| 1W Alva | 11-Aug-1987 | A severe thunderstorm swept through north central Crook County after 1715 MST. This storm produced heavy rain and hail from 0.25 inch to 2 inches in diameter near Hulett. Wyoming Highway 24 south of Hulett was closed for a short time due to one- to 2-foot drifts of hail and minor flooding as more than two inches of rain fell in about 30 minutes. Ranchers south of Hulett reported numerous windows shattered and roof and siding damage due to hail. Ranchers north of Aladdin reported washed out fences and the loss of livestock. Grain crops were battered flat by the hailstorm from Alva to Aladdin. The hail one mile west of Alva drifted to a depth from 4 inches to over 12 inches. |
| Sundance | 13-Jun-1991 | A thunderstorm over Sundance produced nearly 2.72 inches of rain in 45 minutes with street and basement flooding. |
| | 8-May-1995 | Moderate to heavy rain caused flash flooding in the Wyoming Black Hills in Crook county. Three to 7 inches of rain fell on the 8th of May. Aladdin (19 miles northeast of Sundance) had 7 inches of rain over the two day period. Seventeen roads in the Wyoming Black Hills were reported washed out. A part of Wyoming highway 24 under construction was washed out by flood waters. The Belle Fourche river rose above flood stage early on the 9th and caused a lot of rural flooding. |
| 35 N Sundance, Little Missouri River | 30-Jun-2001 | Locally heavy rain from thunderstorms overnight produced a flash flood on the Little Missouri River at Government Canyon. A road was washed out and 8 feet of water was covering the roadway. |
| Central and North portions of Wyoming | 15-May-1978 | Heavy wet snow and record rains did very extensive damage to property, crops, and livestock in 12 counties. Hundreds of homes were damaged, and many totally destroyed. Numerous bridges and sections of roads were washed out, power lines downed, with much damage to cars and personal property. Total estimated damages came to $15.5 million. The following are discharge amounts from WEMA Storm Data: Fifteenmile Creek near Worland (May 18) - 4,270 CFS, Big Horn River at Worland (May 19) - 17,500 CFS, Nowood River near Ten Sleep (May 19) - 3,380 CFS, Shoshone River near Lovell (May 18) - 7,680 CFS), Elk Creek near Basin (May 19) - 2,450 CFS, Shell Creek near Greybull (May 19) - 2,150 CFS, Big Horn River near Kane (May 20) - 20,700 CFS, Little Powder River below Corral Creek near Weston (May 18) - 2,410 CFS, Little Powder River above Dry Creek near Weston (May 19) - 4,460 CFS, Little Powder River above Dry Creek near Weston (May 19) - 5,300 CFS, Salt Creek near Sussex (May 18) - 10,200 CFS, Dead Horse Creek near Buffalo (May 18) - 1,420 CFS, Clear Creek below Rock Creek 162? CFS, Powder River near Kaycee (May 18) - 4,200 CFS, Powder River at Sussex (May 19) - 24,000 CFS, South Fork River near Kaycee (May 20) - 8,200 CFS, Bitter Creek near Garland (May 17) - 552 CFS, Whistle Creek near Garland (May 18) - 2,340 CFS, Shoshone River below Buffalo Bill Reservoir (May 19) - 1,230 CFS, Shoshone River near Garland (May 19) - 4,550 CFS, Goose Creek below Sheridan (May 18) - 5,430 CFS, Prairie Dog Creek near Acme (May 19) - 3,940 CFS, Clear Creek at Ucross 1740 (May 19) - 32,500 CFS, Crazy Woman Creek at Upper Station (May 20) - 2,200 CFS, Little Thunder Creek near Hampshire (May 18) - 3,030 CFS, Black Thunder Creek near Hampshire (May 18) - 5,050 CFS, Turner Creek near Osage (May 18) - 2,480 CFS, Beaver Creek near Newcastle (May 19) - 3,870 CFS. The event was estimated to be a 20- to greater than 100-year flood |
| Gillette 8s | 30-Jul-1987 | A very strong thunderstorm developed near Savageton, about 40 miles southwest of Gillette, at 2045 MST. This storm drenched the town with 1.5 inches of rain in 35 minutes along with 1.5 inch diameter hail. The storm later moved northeast during the next few hours and damaged structures in the south and east sections of Gillette. As the thunderstorm moved into Gillette, 50 to 60 mile an hour winds raked the area along with 1.5 inches of rain in 1 hour. This storm destroyed one unoccupied home. Other damages included numerous horse stalls destroyed, sections of roofs partially destroyed and many city and state road signs severely damaged. Also, lightning struck a home in Gillette and knocked a hole in the ceiling. Many streets and a few apartments were flooded due to the torrential rains between 2100 and 2200 MST. Later that night the very strong thunderstorm moved into Crook County with heavy rain and 0.5 inch diameter hail west of Moorcroft. |
| NON-DAMAGING FLOODS |
| 10 SW Aladdin | 2001-06-04 | Locally heavy rain produced minor flooding over rural areas of Crook and Weston Counties during the evening hours. Small streams rose out of their banks and 6 inches of standing water was reported on highways. By 8 p.m. MST the rain had tapered off, and by midnight, the streams had receeded back within thier banks. |
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