Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 184, NWS Cheyenne, WY

September 8, 2009Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 8, 2009, 4:17 PM MDT for Banner County, Kimball County, Nebraska. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 8, 2009, 4:17 PM MDT (22:17 UTC)
Expired
Sep 8, 2009, 5:15 PM MDT
In force
58 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon

Counties Banner County, NE, Kimball County, NE

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.3 hours before the alert went out and 184 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2009-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2009-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2244 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KCYS 082217
SVRCYS
NEC007-105-082315-
/O.NEW.KCYS.SV.W.0184.090908T2217Z-090908T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
417 PM MDT TUE SEP 8 2009

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
  NORTH CENTRAL KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 515 PM MDT

* AT 416 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HARRISBURG...OR 21 MILES NORTH OF KIMBALL...AND MOVING SOUTHEAST AT
  9 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BIGHORN MOUNTAIN AROUND 515 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN CHEYENNE.

&&

LAT...LON 4133 10401 4170 10365 4169 10352 4158 10337
      4126 10369
TIME...MOT...LOC 2217Z 298DEG 8KT 4152 10375

$$

RUBIN
3 follow-up statements
000 
WWUS55 KCYS 082230
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
430 PM MDT TUE SEP 8 2009

NEC007-105-082315-
/O.CON.KCYS.SV.W.0184.000000T0000Z-090908T2315Z/
BANNER NE-KIMBALL NE-
430 PM MDT TUE SEP 8 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR NORTHERN KIMBALL AND EASTERN BANNER COUNTIES...

AT 430 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED NEAR HARRISBURG...OR 18 MILES NORTH OF
KIMBALL...MOVING SOUTHEAST AT 8 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EASTERN
  BANNER AND NORTH CENTRAL KIMBALL COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

TO REPORT SEVERE WEATHER...CALL THE NEAREST LAW ENFORCEMENT AGENCY
AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN CHEYENNE.

&&

LAT...LON 4133 10401 4170 10365 4169 10352 4158 10337
      4126 10369
TIME...MOT...LOC 2231Z 308DEG 7KT 4148 10376

$$

RUBIN
000 
WWUS55 KCYS 082253
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
453 PM MDT TUE SEP 8 2009

NEC007-105-082315-
/O.CON.KCYS.SV.W.0184.000000T0000Z-090908T2315Z/
BANNER NE-KIMBALL NE-
453 PM MDT TUE SEP 8 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR NORTHERN KIMBALL AND EASTERN BANNER COUNTIES...

AT 451 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
7 MILES SOUTH OF HARRISBURG...OR 16 MILES NORTH OF KIMBALL...MOVING
SOUTHEAST AT 8 MPH.

DOPPLER RADAR INDICATED THAT 2 TO 3 INCHES OF RAIN HAD FALLEN JUST 
WEST AND SOUTHWEST OF HARRISBURG FROM THE SLOW MOVING THUNDERSTORMS. 
WATCH FOR WATER COVERING ROADS.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF EASTERN
  BANNER AND NORTH CENTRAL KIMBALL COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CALL THE NEAREST LAW ENFORCEMENT AGENCY
AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN CHEYENNE.

&&

LAT...LON 4138 10396 4165 10370 4161 10355 4158 10337
      4132 10363
TIME...MOT...LOC 2252Z 308DEG 7KT 4146 10372

$$

RUBIN
000 
WWUS55 KCYS 082312
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
512 PM MDT TUE SEP 8 2009

NEC007-105-082322-
/O.EXP.KCYS.SV.W.0184.000000T0000Z-090908T2315Z/
BANNER NE-KIMBALL NE-
512 PM MDT TUE SEP 8 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN KIMBALL AND EASTERN
BANNER COUNTIES EXPIRES AT 515 PM MDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER
APPEARED TO BE SEVERE...HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH
THIS THUNDERSTORM.

LAT...LON 4138 10396 4165 10370 4161 10355 4158 10337
      4132 10363
TIME...MOT...LOC 2312Z 308DEG 7KT 4144 10368

$$

RUBIN

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, 29 minutes earlier.

Area forecast discussion, Sep 8, 3:48 PM MDT, 29 minutes before
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Hazardous weather outlook, Sep 8, 2:30 PM MDT, 1 hour 47 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, 2:58 PM MDT, 1 hour 19 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, 50 minutes before
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Special weather statement, Sep 8, 3:31 PM MDT, 46 minutes before
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Special weather statement, Sep 8, 3:45 PM MDT, 32 minutes before
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Special weather statement, Sep 8, 4:05 PM MDT, 12 minutes before
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Special weather statement, Sep 8, 4:12 PM MDT, 5 minutes before
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 8, 4:09 PM MDTSevere Thunderstorm WarningCYSMorrill66 min
Sep 8, 4:36 PM MDTSevere Thunderstorm WarningCYSCheyenne41 min
Sep 8, 5:10 PM MDTAreal Flood AdvisoryCYSBanner94 min
Sep 8, 5:14 PM MDTSevere Thunderstorm WarningCYSCheyenne, Morrill36 min
Sep 8, 5:31 PM MDTAreal Flood AdvisoryCYSCheyenne72 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.