Alert archive / Minnesota / Flash Flood Warnings in 1991
Flash Flood Warning 9, NWS Twin Cities, MN
NWS Twin Cities, MN issued this flash flood warning at Jul 21, 1991, 7:41 PM CDT for 4 counties in Minnesota. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1991, 7:41 PM CDT (00:41 UTC)
- Expired
- Jul 21, 1991, 9:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Goodhue County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 0.7 hours before the alert went out and 129 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
- 2851 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRST 220042 FFWRST MNC049-109-157-169-220245- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ROCHESTER MN 741 PM CDT SUN JUL 21 1991 THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST MINNESOTA ...NORTHEASTERN GOODHUE COUNTY...NORTHEASTERN OLMSTED COUNTY ...WABASHA COUNTY...WINONA COUNTY THIS WARNING INCLUDES THE COMMUNITIES OF RED WING...LAKE CITY... WABASHA...ZUMBRO FALLS...PLAINVIEW...ST CHARLES...WINONA...AND WHITEWATER STATE PARK. SLOW-MOVING AND INTENSE THUNDERSTORMS HAVE BEEN PRODUCING TORRENTIAL RAINS ACROSS SOUTHEAST MINNESOTA...NORTHEAST OF A FROM NEAR CANNON FALLS TO ZUMBROTA TO EYOTA TO THE SOUTHEAST CORNER OF OLMSTED COUNTY NEAR CHATFIELD TO THE SOUTHEAST CORNER OF WINONA COUNTY NEAR LA CRESCENT AND LA CROSSE. RAINFALLS...THUS FAR...OF 1.50 TO ALMOST 2.50 INCHES HAVE BEEN REPORTED IN THE WARNING AREA...AND RADAR INDICATED THAT VERY HEAVY RAINS PERSIST ACROSS THIS AREA. THE THUNDERSTORMS WERE MOVING SLOWLY TO THE NORTH AT 15 MILES AN HOUR...BUT...CONTINUED TO DEVELOP. PERSONS IN FLASH FLOOD PRONE AREAS SHOULD TAKE ACTION TO PROTECT LIVES AND OR PROPERTY. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER CcOVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:33 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 57 min |
| Jul 21, 8:17 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Swift | 58 min |
| Jul 21, 8:34 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 26 min |
| Jul 21, 10:10 PM CDT | Flash Flood Warning | MPX | Wabasha, Winona | 2 hr |
| Jul 21, 11:55 PM CDT | Flash Flood Warning | MPX | Wabasha, Winona | 5 hr |
| Jul 22, 1:57 AM CDT | Flash Flood Warning | MPX | Dodge, Goodhue, Olmsted, Steele | 3 hr |
Nearby
Flash Flood Warnings in Minnesota, 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.