Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 33, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 15, 1991, 6:01 PM MDT for Banner County, Cheyenne County, Kimball County, Nebraska. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- May 15, 1991, 6:01 PM MDT (00:01 UTC)
- Expired
- May 15, 1991, 6:36 PM MDT
- In force
- 35 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE
The nearest sounding before it
Rapid City, SD (KRAP), launched 00:00Z, 0.0 hours before the alert went out and 309 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, May 15, 2:07 PM MDT, 3 hours 54 minutes before
NEZ-001-005-011-152110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE VALENTINE NE ISSUED BY SCOTTSBLUFF NE 205 PM MDT WED MAY 15 1991 ...THUNDERSTORMS MOVING ACROSS WESTERN AND CENTRAL CHERRY COUNTY... AT 203 PM MDT...RADAR INDICATED AN AREA OF THUNDERSTORMS MOVING ACROSS WESTERN AND CENTRAL CHERRY COUNTY IN NORTHCENTRAL NEBRASKA. THE STRONGEST STORM WAS 70 MILES WEST OF VALENTINE OR 20 MILES SOUTH OF MERRIMAN NEBRASKA MOVING TO THE NORTH AT 20 MPH. BRIEF HEAVY RAIN... SMALL HAIL AND VERY STRONG GUSTY WINDS WILL BE POSSIBLE WITH THESE STORMS UNTIL 300 PM MDT AS THEY MOVE NORTH ACROSS CHERRY COUNTY IN NORTHCENTRAL NEBRASKA. SALMONS
Special weather statement, May 15, 2:29 PM MDT, 3 hours 32 minutes before
NEZ-001-005-011-152130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 229 PM MDT TUE MAY 14 1991 ...A STRONG THUNDERSTORM IN THE NORTHERN NEBRASKA PANHANDLE... ...TORNADO WATCH NUMBER 338 IN EFFECT UNTIL 7 PM MDT FOR THE NEBRASKA PANHANDLE... AT 226 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM IN EXTREME SOUTHEAST DAWES COUNTY ABOUT 20 MILES SOUTHEAST OF CHADRON...OR 30 MILES NORTH OF ALLIANCE. THE STORM WAS MOVING NORTH AT 20 MPH AND SHOULD REMAIN EAST OF CHADRON AS IT MOVES THROUGH FAR WESTERN DAWES COUNTY. BRIEF HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WIND ARE POSSIBLE WITH THIS STORM AS IT MOVES THROUGH THE NORTHERN PANHANDLE UNTIL 330 PM MDT. PEEK
Special weather statement, May 15, 2:32 PM MDT, 3 hours 29 minutes before
NEZ-001-005-011-152130- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 229 PM MDT TUE MAY 14 1991 ...A STRONG THUNDERSTORM IN THE NORTHERN NEBRASKA PANHANDLE... ...TORNADO WATCH NUMBER 338 IN EFFECT UNTIL 7 PM MDT FOR THE NEBRASKA PANHANDLE... AT 226 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM IN EXTREME SOUTHEAST DAWES COUNTY ABOUT 20 MILES SOUTHEAST OF CHADRON...OR 30 MILES NORTH OF ALLIANCE. THE STORM WAS MOVING NORTH AT 20 MPH AND SHOULD REMAIN EAST OF CHADRON AS IT MOVES THROUGH FAR EASTERN DAWES COUNTY. BRIEF HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WIND ARE POSSIBLE WITH THIS STORM AS IT MOVES THROUGH THE NORTHERN PANHANDLE UNTIL 330 PM MDT. PEEK
Special weather statement, May 15, 2:45 PM MDT, 3 hours 16 minutes before
WYZ017-152200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 245 PM MDT WED MAY 15 1991 ...A TORNADO WATCH IS IN EFFECT FOR EXTREME SOUTHEAST WYOMING UNTIL 7PM THIS EVENING... THUNDERSTORMS HAVE DEVELOPED IN NORTHEAST COLORADO THIS AFTERNOON. AT 240PM STRONG STORMS WERE LOCATED ABOUT 20 MILES SOUTHWEST OF CHEYENNE MOVING NORTHWEST AT 25 MILE AN HOUR. AT THIS SPEED...THEY SHOULD MOVE INTO THE CHEYENNE AREA WITHIN THE HOUR. THESE STORMS COULD PRODUCE HAIL...STRONG WINDS AND BRIEF HEAVY RAIN. PEOPLE IN AND AROUND CHEYENNE ARE URGED TO KEEP AN EYE ON THE WEATHER AND TO BE PREPARED TO MOVE TO A SAFE PLACE IN CASE THREATENING WEATHER APPROACHES. A TORNADO WATCH IES IN EFFECT FOR EXTREME SOUTHEAST WYOMING UNTIL 7PM THIS EVENING. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR SOUTHEAST WYOMING UNTIL 10PM THIS EVENING. CGB
Special weather statement, May 15, 2:48 PM MDT, 3 hours 13 minutes before
WYZ017-152200- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHEYENNE WY 247 PM MDT WED MAY 15 1991 ...A TORNADO WATCH IS IN EFFECT FOR EXTREME SOUTHEAST WYOMING UNTIL 7PM THIS EVENING... THUNDERSTORMS HAVE DEVELOPED IN NORTHEAST COLORADO THIS AFTERNOON. AT 240PM STRONG STORMS WERE LOCATED ABOUT 20 MILES SOUTHEAST OF CHEYENNE MOVING NORTHWEST AT 25 MILE AN HOUR. AT THIS SPEED...THEY SHOULD MOVE INTO THE CHEYENNE AREA WITHIN THE HOUR. THESE STORMS COULD PRODUCE HAIL...STRONG WINDS AND BRIEF HEAVY RAIN. PEOPLE IN AND AROUND CHEYENNE ARE URGED TO KEEP AN EYE ON THE WEATHER AND TO BE PREPARED TO MOVE TO A SAFE PLACE IN CASE THREATENING WEATHER APPROACHES. A TORNGADO WATCH IS IN EFFECT FOR EXTREME SOUTHEAST WYOMING UNTIL 7PM THIS EVENING. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR SOUTHEAST WYOMING UNTIL 10PM THIS EVENING. CGB
Special weather statement, May 15, 4:16 PM MDT, 1 hour 45 minutes before
NEZ-001-005-011-152315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 415 PM MDT TUE MAY 14 1991 ...TORNADO WATCH NUMBER 338 IN EFFECT UNTIL 7 PM MDT AND A FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT... ...THUNDERSTORMS IN KIMBALL COUNTY... AT 413 PM MDT...RADAR INDICATED STRONG THUNDERSTORMS IN WESTERN KIMBALL COUNTY. THE STRONGEST THUNDERSTORM WAS 45 MILES WEST OF SIDNEY OR 15 MILES SOUTHWEST OF KIMBALL IN KIMBALL COUNTY OF THE NEBRASKA PANHANDLE. THE STORMS WERE MOVING NORTHWEST AT 15 MPH. HEAVY RAIN...HAIL AND STRONG GUSTY WIND ARE POSSIBLE WITH THESE STORMS AS THEY MOVE NORTHWEST THROUGH KIMBALL COUNTY UNTIL 515 PM MDT. SALMONS
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 6:01 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff | 35 min |
| May 15, 6:36 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Morrill, Scotts Bluff | 39 min |
| May 15, 7:47 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 43 min |
| May 15, 7:47 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 43 min |
| May 15, 8:37 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 50 min |
| May 15, 8:37 PM MDT | Severe Thunderstorm Warning | CYS | Garden | 50 min |
| May 15, 8:38 PM MDT | Flash Flood Warning | CYS | Dawes, Sioux | 5 hr |
| May 16, 12:57 AM MDT | Flash Flood Warning | CYS | Dawes, Sioux | 2 hr |
| May 16, 2:43 PM MDT | Flash Flood Warning | CYS | Dawes, Sioux | 3 hr |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1991Every severe thunderstorm warning 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.