Storm Events Database

Event Details

Event Hail
Magnitude 0.88 in.
State WYOMING
County/Area JOHNSON
WFO RIW
Report Source Public
NCDC Data Source CSV
Begin Date 2009-08-07 21:25:00.0 MST-7
Begin Location 2ESE MAYOWORTH
Begin Lat/Lon 43.82/-106.77
End Date 2009-08-07 21:25:00.0 MST-7
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative A large upper level low spinning slowly east from southern Idaho helped to trigger severe thunderstorms across the north half of Wyoming. Surface dew points in the 50s (degrees F), a favorable jet stream location, and a front sliding south from Montana all combined to set the stage for thunderstorms. The storms formed late in the afternoon and persisted through the evening and into the early morning hours.
Event Narrative Nickel sized hail fell near Mayoworth.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 1 78.00K 25.00K
BURLINGTON BIG HORN CO. WY 08/07/2009 15:44 MST-7 Hail 1.25 in. 0 0 0.00K 25.00K
OTTO BIG HORN CO. WY 08/07/2009 15:51 MST-7 Hail 1.25 in. 0 0 0.00K 0.00K
GREYBULL BIG HORN CO. WY 08/07/2009 16:10 MST-7 Hail 2.00 in. 0 1 75.00K 0.00K
GREYBULL BIG HORN CO. WY 08/07/2009 16:15 MST-7 Hail 2.50 in. 0 0 0.00K 0.00K
GREYBULL BIG HORN CO. WY 08/07/2009 16:17 MST-7 Hail 2.00 in. 0 0 2.00K 0.00K
GREYBULL ARPT BIG HORN CO. WY 08/07/2009 16:24 MST-7 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
KAYCEE GOSNEY ARPT JOHNSON CO. WY 08/07/2009 21:20 MST-7 Hail 2.00 in. 0 0 1.00K 0.00K
MAYOWORTH JOHNSON CO. WY 08/07/2009 21:25 MST-7 Hail 0.88 in. 0 0 0.00K 0.00K
BUFFALO JOHNSON CO. WY 08/07/2009 22:20 MST-7 Hail 1.75 in. 0 0 0.00K 0.00K
CASPER HARFORD ARPT NATRONA CO. WY 08/08/2009 01:10 MST-7 Hail 0.88 in. 0 0 0.00K 0.00K
Totals: 0 1 78.00K 25.00K