Alert archive / Minnesota / Flash Flood Warnings in 1990

Flash Flood Warning 15, NWS Twin Cities, MN

July 26, 1990Chisago County, Minnesota

NWS Twin Cities, MN issued this flash flood warning at Jul 26, 1990, 7:23 AM CDT for Chisago County, Minnesota. It was in force for 102 min.

The area

The counties it named.

The facts

Issued: Jul 26, 1990, 7:23 AM CDT (12:23 UTC)
Expired: Jul 26, 1990, 9:05 AM CDT
In force: 102 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Chisago County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 0.4 hours before the alert went out and 91 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 6 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 159 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 KMSP 261225
FFWMSP
MNC003-019-025-123-163-261430-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
723 AM CDT THU JUL 26 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  945 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN EAST CENTRAL MINNESOTA
          ...ANOKA...CARVER...CHISAGO...RAMSEY...WASHINGTON
 
HEAVY RAIN CONTINUES TO FALL OVER LARGE PORTIONS OF THE WESTERN AND
NORTHERN TWIN CITIES METRO. FROM 3 TO 4 INCHES OF RAIN HAVE BEEN
REPORTED AT ST. LOUIS PARK AND MINNEHAHA CREEK IS OUT OF ITS BANKS IN
SEVERAL SPOTS. ADDITIONALLY SHAKOPEE..15 MILES SOUTHWEST OF THE TWIN
CITIES REPORTED 4 INCHES OF RAIN. THE RAINFALL AREA ON WEATHER RADAR
CONTINUES TO FEED INTO THE METROPOLITAN AREA FROM THE SOUTH.
 
PARTICULARY VULNERABLE FOR FLOODING ARE ROADS AND URBAN AREAS. THE
FLASH FLOOD WARNING INCLUDES THE CITIES OF MINNEAPOLIS AND ST PAUL
AS WELL AS THE CITIES OF CHASKA..ANOKA..STILLWATER AND FOREST LAKE.
 
 
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.

Issued	Product	Office	Counties	Lasted
Jul 26, 3:25 AM CDT	Flash Flood Warning	MPX	Redwood, Renville	3 hr
Jul 26, 6:41 AM CDT	Flash Flood Warning	MPX	Hennepin	3 hr
Jul 26, 7:23 AM CDT	Flash Flood Warning	MPX	Anoka, Ramsey, Washington	102 min
Jul 26, 7:23 AM CDT	Flash Flood Warning	MPX	Carver	102 min

Nearby

Flash Flood Warnings in Minnesota, 1990 Every flash flood warning in 1990

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.