Alert archive / Minnesota / Flash Flood Warnings in 1991

Flash Flood Warning 4, NWS Twin Cities, MN

June 4, 1991Blue Earth County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jun 4, 1991, 5:14 AM CDT for Blue Earth County, Minnesota. It was in force for 106 min.

The area

The counties it named.

The facts

Issued
Jun 4, 1991, 5:14 AM CDT (10:14 UTC)
Expired
Jun 4, 1991, 7:00 AM CDT
In force
106 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Blue Earth County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 10.2 hours before the alert went out and 98 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, Minneapolis, MN at 00:00Z on 1991-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1991-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
10 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1121 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
109 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 
TTAA00 KRST 041014 RRA
FFWRST
MNC013-041215-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
514 AM CDT TUE JUN 4 1991
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
FLASH FLOOD WARNING         EFFECTIVE UNTIL  700 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...BLUE EARTH COUNTY
 
AT 500AM AN OFFICIAL RAINFALL OBSERVER IN AMBOY...20 MILES SOUTWEST OF
MANKATO...INDICATED THAT 9.85 INCHES OF RAIN HAD FALLEN IN THAT AREA
SINCE YESTERDAY AFTERNOON. UNOFFICIAL RAINFALL REPORTS FROM THE SAME
AREA HAVE INDICATED THAT TOTALS WERE INTO THE 12 TO 13 INCH RANGE.
RADAR AT 500AM CDT INDICATED THAT THE RAINS IN THIS AREA WERE
EASING...HOWEVER MANY CREEK AND STREAMS HAVE YET TO REALIZE THEIR HIGHES
L 
RAIN WAS FALLING GENERALLY WEST OF A LINE FROM MANKATO TO ALBERT LEA.
THIS AREA WAS MOVING TO THE NORTH AROUND 10 MPH.
 
CITIES INCLUDED IN THIS WARNING ARE...AMBOY...GOOD THUNDER...LAKE
CRYSTAL...AND MANKATO.
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE$ TO HIGHER GROUND.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 3, 10:42 PM CDTFlash Flood WarningMPXMartin78 min
Jun 3, 11:20 PM CDTFlash Flood WarningMPXYellow Medicine5 hr
Jun 4, 12:00 AM CDTFlash Flood WarningMPXMartin60 min
Jun 4, 7:28 AM CDTFlash Flood WarningMPXBlue Earth3 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.