Alert archive / Nebraska / Flash Flood Warnings in 1991
Flash Flood Warning 4, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at May 15, 1991, 8:38 PM MDT for Dawes County, Sioux County, Nebraska. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- May 15, 1991, 8:38 PM MDT (02:38 UTC)
- Expired
- May 16, 1991, 1:15 AM MDT
- In force
- 5 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Dawes County, NE, Sioux County, NE
The nearest sounding before it
Rapid City, SD (KRAP), launched 00:00Z, 2.6 hours before the alert went out and 169 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
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBFF 160238
FFWBFF
NEC165-045-160715-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SCOTTSBLUFF NE
838 PM MDT WED MAY 15 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 115 AM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE PANHANDLE OF NEBRASKA
NORTHERN SIOUX...WESTERN DAWES
AT 830 PM MDT...FLASH FLOODING WAS IMMINENT FOR THE WHITE RIVER AND
ITS TRIBUTARIES...NORTH OF THE PINE RIDGE IN NORTHERN SIOUX AND
WESTERN DAWES COUNTIES OF THE NEBRASKA PANHANDLE.
STRONG THUNDERSTORMS WITH HEAVY RAIN AND HAIL WERE MOVING FROM THE
SOUTH INTO THE PINE RIDGE AREA. THIS WARNING INCLUDES THE TOWN OF
CRAWFORD AND THE FORT ROBINSON STATE RECREATION AREA.
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS OCCURRING OR
IMMINENT. DO NOT WASTE TIME TRYING TO SAVE PERSONAL PROPERTY...MOVE
TO HIGHER GROUND IMMEDIATELY. DO NOT ATTEMPT TO CROSS FAST MOVING
WATER BY FOOT OR AUTO.
PEOPLE IN THE WARNED AREA...ESPECIALLY CAMPERS...SHOULD SEEK HIGHER
GROUND WITHOUT DELAY. MOTORISTS USE CAUTION IN APPROACHING LOW
AREAS OF ROADS.
CAMPERS IN FORT ROBINSON STATE PARK...BE ALERT TO THIS FLOOD THREAKT
AND MOVE TO HIGHER GROUND IMMEDIATELY.
THIS WARNING HAS BEEN ISSUED DUE TO EXISTING AND ON-GOING PROBLEMS
THAT ARE OCCURRING IN SIOUX AND DAWES COUNTIES SINCE LAST WEEKEND.
PFEIFFERWhat forecasters said that day
The local office's own words before this flash flood 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, 2:45 PM MDT, 5 hours 53 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, 5 hours 50 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, 4 hours 22 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
Special weather statement, May 15, 7:05 PM MDT, 1 hour 33 minutes before
WYZ017-160200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 705 PM MDT WED MAY 15 1991 ...THE TORNADO WATCH FOR EXTREME SOUTHEAST WYOMING HAS BEEN ALLOWED TO EXPIRE... THE TORNADO WATCH POSTED EARLIER FOR EXTREME SOUTHEAST WYOMING HAS BEEN ALLOWED TO EXPIRE. HOWEVER...AT 700 PM MDT...A FEW THUNDERSTORMS CONTINUED TO MOVE NORTH AT 15 MILES AN HOUR ALONG THE NEBRASKA BORDER. THESE STORMS WILL STILL AFFECT EASTERN GOSHEN COUNTY...INCLUDING THE TOWN OF TORRINGTON. THESE THUNDERSTORMS WILL PRODUCE STRONG WINDS... BRIEF HEAVY RAIN...SMALL HAIL..AND DEADLY LIGHTNING. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. STAY INSIDE UNTIL THE STORM PASSES. VIRGILLITO
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 | Banner, Cheyenne, Kimball | 35 min |
| 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 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
Flash Flood Warnings in Nebraska, 1991Every flash flood 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.