Alert archive / Minnesota / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 83, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 21, 1989, 9:06 PM CDT for Hennepin County, Minnesota. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1989, 9:06 PM CDT (02:06 UTC)
- Expired
- Aug 21, 1989, 10:15 PM CDT
- In force
- 69 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Hennepin 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 00:00Z, 2.1 hours before the alert went out and 20 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
- 2042 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 165 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMSP 220207
SVRMSP
MNC053-220315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
906 PM CDT MON AUG 21 1989
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN EAST CENTRAL MINNESOTA
...HENNEPIN
RADAR AND SURFACE WIND REPORTS INDICATE A SEVERE THUNDERSTORM ENTERING
WESTERN HENNIPEN COUNTY. THE STORM IS MOVING EAST AT 20 MPH
AND SHOULD PASS DOWNTOWN MINNEAPOLIS AT ABOUT 930 PM CDT THIS EVENING.
SURFACE WIND ESTIMATES OF 50 TO 60 MPH HAVE BEEN RECEIVED BY TRAINED
OBSERVERS.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE. REMEMBER SEVERE THUNDERSTORMS
CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE ADVANCE WARNING
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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, Aug 21, 5:19 PM CDT, 3 hours 47 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION FOR DATE AND TIME NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 518 PM CDT MON AUG 21 1989 ...DANGEROUS SEVERE WEATHER SITUATION SETTING UP FOR SOUTH AND CENTRAL MINNESOTA THIS EVENING... AFTER SEVERAL YEARS OF LOW SEVERE WEATHER FREQUENCY FOR MUCH OF SOUTH MINNESOTA..A VERY ACTIVE EVENING APPEARS TO BE SHAPING UP FOR MUCH OF THE AREA THIS MONDAY. THE WEATHER SITUATION THIS EVENING IS FAVORABLE FOR BOTH SEVERE THUNDERSTORM AND TORNADO FORMATION DUE TO A COMBINATION OF STRONG DYNAMICS FOR THIS TIME OF YEAR..AND A GREAT DEAL OF AIRMASS INSTABILITY. IT IS IMPORTANT TO STAY ABREAST OF THE WEATHER SITUATION THIS EVENING AS WEATHER CONDITIONS ARE LIKELY TO CHANGE QUITE RAPIDLY AT ANY ONE SPOT AS THESE STORMS MOVE IN. POWERFUL THUNDERSTORMS HAVE FORMED IN WEST CENTRAL MINNESOTA AND THERE IS NO REASON THAT THEY WILL NOT HOLD TOGETHER AND SWEEP ACROSS ALL OF SOUTH MINNESOTA BEFORE THE 5EVENING IS OVER. THE TWIN CITIES IS LIKELY TO GET INTO THE ACTION AFTER ABOUT 8 PM CDT THIS EVENING..BUT THE AIRMASS IS UNSTABLE ENOUGH FOR SEVERE STORMS TO DEVELOP BEFORE THAT TIME. TOGSTAD
Special weather statement, Aug 21, 7:10 PM CDT, 1 hour 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 709 PM CDT MON AUG 21 1989 ...MARBLE SIZE HAIL IN EASTERN RENVILLE COUNTY...MOVING INTO MCLEOD COUNTY... AT 649 PM...ONE HALF INCH HAIL FELL IN HECTOR...OR ABOUT 20 MILES NORTHEAST OF REDWOOD FALLS. THE STORM HAS SINCE MOVED INTO WESTERN MCLEOD COUNTY...BUT RADAR INDICATED THE STORM HAS NOT INCREASED AT THIS POINT. HOWEVER...PERSONS IN MCLEOD SHOULD BE READY TO GET TO SHELTER IF THE STORM SHOULD SUDDENLY INCREASE. LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. KRAUSE
Special weather statement, Aug 21, 8:29 PM CDT, 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 830 PM CDT MON AUG 21 1989 ...STRONG THUNDERSTORMS OVER MCLEOD COUNTY WILL BE ENTERING WESTERN HENNEPIN COUNTY AROUND 9 PM CDT THIS EVENING... STRONG THUNDERSTORMS WILL BE PASSING OVER LAKE MINNETONKA BETWEEN 9 PM CDT AND 10 PM CDT. THESE STORMS HAVE A HISTORY OF PRODUCING 30 TO 45 MPH WINDS AND BLINDING RAINFALL SO RECREATIONAL BOATERS SHOULD GET OFF THE LAKE IMMEDIATELY!s TOGSTAD
Special weather statement, Aug 21, 8:33 PM CDT, 33 minutes before
URBAN AND SMALL STREAM FLOOD STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 830 PM CDT MON AUG 21 1989 ...THUNDERSTORMS WITH HEAVY RAINFALL APPROACHING THE TWIN CITIES METROPOLITAN AREA... A LINE OF THUNDERSTORMS WITH TORRENTIAL RAINFALL HAS BEEN SAGGING SLOWLY SOUTH THROUGH EAST CENTRAL MINNESOTA TOWARD THE TWIN CITIES METROPOLITAN AREA. AT 830 PM THIS LINE OF THUNDERSTORMS EXTENDED FROM HUTCHINSON IN NORTHERN MCLEOD COUNTY THROUGH CENTRAL WRIGHT COUNTY TO THE ELK RIVER AREA ALONG THE MISSISSIPPI RIVER AND ON NORTH TO CAMBRIDGE IN ISANTI COUNTY. HEAVY RAINFALL RESULTING FROM THIS LINE OF THUNDERSTORMS IS LIKELY TO CAUSE LOW LAND FLOODING AND POSSIBLY RAPID RUNOFF IN NORTH AND NORTHWEST OF THE TWIN CITIES THROUGH PORTIONS OF WRIGHT..SHERBURNE AND ISANTI COUNTIES. RUNOFF FROM THE HEAVY RAIN HAS ACCUMULATED TO 6 TO 8 INCHES AT HIGHWAY INTERSECTIONS IN THE VICINITY OF HOWARD LAKE IN WRIGHT COUNTY. THIS LINE OF THUNDERSTORMS MAY ALSO CAUSE FLOODING IN FLOOD PRONE AREAS SUCH AS UNDERPASSES AS IS MOVES INTO THE METROPOLITAN AREA THIS EVENING. THIS LINE OF THUNDERSTORMS IS MOVING SOUTHEAST AROUND 15 MILES PER HOUR AND WILL BEGIN TO MOVE INTO WESTERN CARVER... NORTHERN AND WESTERN HENNEPIN AND ANOKA COUNTIES SHORTLY AFTER 900PM. BY BETWEEN 1000 AND 1030 PM THE THUNDERSTORMS WILL BE MOVING INTO DOWNTOWN MINNEAPOLIS AND ST PAUL AND THEN INTO THE SOUTHERN SECTIONS OF THE METRO AREA AFTER 1100PM. WJH
Special weather statement, Aug 21, 8:45 PM CDT, 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 845 PM CDT MON AUG 21 1989 ...STRONG THUNDERSTORMS OVER WRIGHT COUNTY WILL BE ENTERING WESTERN HENNEPIN COUNTY AROUND 9 PM CDT THIS EVENING... STRONG THUNDERSTORMS WILL BE PASSING OVER WESTERN HENNIPEN COUNTY 9 PM CDT AND 10 PM CDT. SPOTTERS NOW REPORT 50 MPH WINDS AT MONTROSE IN SOUTHEAST WRIGHT COUNTY. ALL RECREATIONAL INTERESTS IN WEST HENNIPEN COUNTY SHOULD SEEK SHELTER IMMEDIATELY..BOATERS..GET OFF AREA LAKE QUICKLY! TOGSTAD
Special weather statement, Aug 21, 8:47 PM CDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 845 PM CDT MON AUG 21 1989 ...STRONG THUNDERSTORMS OVER WRIGHT COUNTY WILL BE ENTERING WESTERN HENNEPIN COUNTY AROUND 9 PM CDT THIS EVENING... STRONG THUNDERSTORMS WILL BE PASSING OVER WESTERN HENNEPIN COUNTY 9 PM CDT AND 10 PM CDT. SPOTTERS NOW REPORT 50 MPH WINDS AT MONTROSE IN SOUTHEAST WRIGHT COUNTY. ALL RECREATIONAL INTERESTS IN WEST HENNEPIN COUNTY SHOULD SEEK SHELTER IMMEDIATELY..BOATERS..GET OFF AREA LAKES QUICKLY! TOGSTAD
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:09 PM CDT | Severe Thunderstorm Warning | MPX | Meeker | 36 min |
| Aug 21, 7:48 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago | 57 min |
| Aug 21, 8:02 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 58 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1989Every severe thunderstorm warning in 1989
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.