Alert archive / Nebraska / Tornado Warnings in 1991
Tornado Warning 39, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Aug 7, 1991, 5:30 PM MDT for Sheridan County, Nebraska. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Aug 7, 1991, 5:30 PM MDT (23:30 UTC)
- Expired
- Aug 7, 1991, 6:00 PM MDT
- In force
- 30 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Sheridan County, NE
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 11.5 hours before the alert went out and 178 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
- 5 J/kg
- Mixed-layer CIN
- -292 J/kg
- Mixed-layer LCL
- 865 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBFF 072330
TORBFF
NEC161-080000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
530 PM MDT WED AUG 7 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 600 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY
IN THE PANHANDLE OF NEBRASKA
CENTRAL SHERIDAN
AT 527 PM MDT...RADAR INDICATED A TORNADO 5 MILES SOUTHWEST OF
RUSHVILLE...MOVING SOUTHEAST AT 10 MPH.
TAKE SHELTER IN A BASEMENT IF AVAILABLE. OTHERWISE GO TO A SMALL
INTERIOR ROOM ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS. ABANDON
CARS AND MOBILE HOMES.
GIVE REPORTS OF SEVERE WEATHER OR DAMAGE TO A LAW ENFORCEMENT AGENCY
FOR RELAY TO TH,E NATIONAL WEATHER SERVICE.
SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 6 PM FOR NORTH BOX BUTTE
AND SOUTHERN DAWES COUNTIES.
PEEKWhat forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 7, 3:21 PM MDT, 2 hours 9 minutes before
NEZ002-0702230 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE VALENTINE NE ISSUED BY SCOTTSBLUFF NE 320 PM MDT WED AUG 7 1991 ...STRONG THUNDERSTORM OVER SOUTHEAST CHERRY COUNTY... AT 318 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM OVER SOUTHEAST CHERRY COUNTY 40 MILES OUTHEAST OF VALENTINE NEBRASKA. THE STORM WAS MOVING TO THE NORTHEAST AT 20 MPH. HEAVY RAIN...STRONG GUSTY WIND...SMALL HAIL AND DEADLY LIGHTNING ARE POSSIBLE WITH THIS STORM OVER SOUTHEAST CHERRY COUNTY UNTIL 430 PM MDT. EMANUEL
Special weather statement, Aug 7, 3:22 PM MDT, 2 hours 8 minutes before
NEZ002-0702230 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE VALENTINE NE ISSUED BY SCOTTSBLUFF NE 320 PM MDT WED AUG 7 1991 ...STRONG THUNDERSTORM OVER SOUTHEAST CHERRY COUNTY... AT 318 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM OVER SOUTHEAST CHERRY COUNTY 40 MILES OUTHEAST OF VALENTINE NEBRASKA. THE STORM WAS MOVING TO THE NORTHEAST AT 20 MPH. HEAVY RAIN...STRONG GUSTY WIND...SMALL HAIL AND DEADLY LIGHTNING ARE POSSIBLE WITH THIHS STORM OVER SOUTHEAST CHERRY COUNTY UNTIL 430 PM MDT. EMANUEL
Special weather statement, Aug 7, 3:33 PM MDT, 1 hour 57 minutes before
NEZ001-005-011-072230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 333 PM MDT WED AUG 7 1991 ...STRONG THUNDERSTORMS OVER THE NORTH NEBRASKA PANHANDLE... AT 331 PM MDT...STRONG THUNDERSTORMS WERE SHOWN BY RADAR 50 MILES WEST ...20 MILES EAST AND 35 MILES SOUTHWEST OF CHADRON. THE STORMS WERE MOVING EAST AT 10 MPH. BRIEF HEAVY RAIN...STRONG GUSTY WIND...SMALL HAIL AND DEADLY LIGHTNING ARE POSSIBLE IN NORTHERN SIOUX...WESYTERN DAWES AND NORTHERN SHERIDAN COUNTIES UNTIL 430 PM MDT. PEEK
Special weather statement, Aug 7, 4:21 PM MDT, 1 hour 9 minutes before
NEZ001-005-011-072320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 421 PM MDT WED AUG 7 1991 ...STRONG THUNDERSTORMS OVER THE NORTH NEBRASKA PANHANDLE... AT 419 PM MDT...STRONG THUNDERSTORMS WERE SHOWN BY RADAR 30 MILES SOUTHWEST OF CHADRON...OR 7 MILES SOUTHWEST OF CRAWFORD. ANOTHER VERY STRONG STORM WAS LOCATED FROM 20 MILES NORTHEAST TO 15 MILES SOUTHEAST OF CHADRON. MOVEMENT OF ALL ACTIVITY WAS TO THE EAST AT 10 MPH. BRIEF HEAVY RAIN...STRONG GUSTY WIND...SMALL HAIL AND DEADLY LIGHTNING ARE POSSIBLE IN NORTHERN AND CENTRAL SIOUX...WESTERN DAWES AND NORTHERN SHERIDAN COUNTIES AT LEAST UNTIL 520 PM MDT. PEEK
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 6:38 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 67 min |
| Aug 6, 7:22 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 38 min |
| Aug 6, 8:05 PM MDT | Severe Thunderstorm Warning | CYS | Sheridan | 25 min |
| Aug 6, 9:30 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 30 min |
| Aug 6, 10:03 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 27 min |
| Aug 7, 4:55 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 51 min |
| Aug 7, 5:19 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 27 min |
Nearby
Tornado Warnings in Nebraska, 1991Every tornado warning in 1991Tornadoes in 1991
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.