Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 183, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 8, 2009, 4:09 PM MDT for Morrill County, Nebraska. It was in force for 66 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, 4:09 PM MDT (22:09 UTC)
- Expired
- Sep 8, 2009, 5:15 PM MDT
- In force
- 66 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
County Morrill County, NE
The radar
The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 21:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
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, 10.2 hours before the alert went out and 211 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, 21 minutes earlier.
Area forecast discussion, Sep 8, 3:48 PM MDT, 21 minutes before
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</html>Hazardous weather outlook, Sep 8, 2:30 PM MDT, 1 hour 39 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
Special weather statement, Sep 8, 2:10 PM MDT, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 210 PM MDT TUE SEP 8 2009 NEZ054-055-082115- CHEYENNE-KIMBALL- 210 PM MDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN KIMBALL AND WESTERN CHEYENNE COUNTIES UNTIL 315 PM MDT... AT 209 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR KIMBALL AIRPORT...OR NEAR KIMBALL...MOVING EAST AT 17 MPH. PENNY SIZE HAIL...AND WINDS AROUND 55 MPH ARE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... DIX BY 245 PM MDT. I-80 EXIT 29 IS ALSO IN THE PATH OF THIS STORM. THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 19 AND 37. RUBIN
Special weather statement, Sep 8, 2:58 PM MDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 258 PM MDT TUE SEP 8 2009 NEZ055-082200- CHEYENNE- 258 PM MDT TUE SEP 8 2009 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHEYENNE COUNTY UNTIL 400 PM MDT... AT 245 PM MDT...TWO TRAINED SPOTTERS REPORTED A BRIEF TORNADO TOUCHDOWN NEAR BROWNSON...TO THE NORTHWEST OF SIDNEY. THE TORNADO HAS SINCE LIFTED UP AND DISSIPATED. NO CONFIRMED REPORTS OF DAMAGE WERE REPORTED. SINCE THE REFLECTIVITY ECHOES WERE QUITE WEAK AT THAT TIME AROUND BROWNSON...THE TORNADO WAS LIKELY A LANDSPOUT ASSOCIATED WITH THE GUST FRONT MOVING THROUGH THE AREA. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 1000 PM MDT FOR CHEYENNE AND MORRILL COUNTIES OF WESTERN NEBRASKA. RUBIN
Local storm report, Sep 8, 3:27 PM MDT, 42 minutes before
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</html>Special weather statement, Sep 8, 3:31 PM MDT, 38 minutes before
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</html>Special weather statement, Sep 8, 3:45 PM MDT, 24 minutes before
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</html>Special weather statement, Sep 8, 4:05 PM MDT, 4 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, 4:17 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 58 min |
| Sep 8, 4:36 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 41 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; radar from the NEXRAD Level II archive.