Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 185, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 8, 2009, 4:36 PM MDT for Cheyenne County, Nebraska. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 8, 2009, 4:36 PM MDT (22:36 UTC)
- Expired
- Sep 8, 2009, 5:17 PM MDT
- In force
- 41 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
County Cheyenne County, NE
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 8, 1:53 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.6 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 421 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 1036 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 8, 3:48 PM MDT, 48 minutes earlier.
Area forecast discussion, Sep 8, 3:48 PM MDT, 48 minutes before
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</html>Hazardous weather outlook, Sep 8, 2:30 PM MDT, 2 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 230 PM MDT TUE SEP 8 2009 NEZ001>003-019-020-054-WYZ059>070-092030- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-KIMBALL-CONVERSE- NIOBRARA-SOUTHWEST CARBON-NORTH CARBON-SNOWY RANGE- NORTH LARAMIE RANGE-LARAMIE VALLEY-LARAMIE RANGE-PLATTE-GOSHEN- CHEYENNE FOOTHILLS-PINE BLUFFS- 230 PM MDT TUE SEP 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR THROUGH EARLY THIS EVENING. SOME OF THE STORMS COULD PRODUCE GUSTY WINDS AND MODERATE RAINFALL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ021-055-092030- MORRILL-CHEYENNE- 230 PM MDT TUE SEP 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT SEVERE THUNDERSTORM WATCH NUMBER 737 IS IN EFFECT UNTIL 10 PM MDT TONIGHT. SCATTERED THUNDERSTORMS WILL OCCUR THROUGH THIS EVENING AS A COLD FRONT MOVES SOUTHEAST ACROSS THE AREA. SOME OF THE STORMS COULD BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS POSSIBLE. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD REPORT ANY SEVERE WEATHER AND FLOODING TO THEIR LOCAL LAW ENFORCEMENT OR THE NATIONAL WEATHER SERVICE IN CHEYENNE. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
In the hours before
Local storm report, Sep 8, 3:27 PM MDT, 1 hour 9 minutes before
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</html>Special weather statement, Sep 8, 3:31 PM MDT, 1 hour 5 minutes before
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</html>Special weather statement, Sep 8, 3:45 PM MDT, 51 minutes before
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</html>Special weather statement, Sep 8, 4:05 PM MDT, 31 minutes before
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</html>Special weather statement, Sep 8, 4:12 PM MDT, 24 minutes before
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</html>Special weather statement, Sep 8, 4:33 PM MDT, 3 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 4:09 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 66 min |
| Sep 8, 4:17 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 58 min |
| Sep 8, 5:10 PM MDT | Areal Flood Advisory | CYS | Banner | 94 min |
| Sep 8, 5:14 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 36 min |
| Sep 8, 5:31 PM MDT | Areal Flood Advisory | CYS | Cheyenne | 72 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.