Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 101, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 1991, 2:07 PM CDT for Anoka County, Chisago County, Washington County, Minnesota. It was in force for 33 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 17, 1991, 2:07 PM CDT (19:07 UTC)
- Expired
- Jul 17, 1991, 2:40 PM CDT
- In force
- 33 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Anoka County, MN, Chisago County, MN, Washington County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 17, 2:20 PM CDT | Thunderstorm Wind 0 | Anoka, MN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 7.1 hours before the alert went out and 66 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
- 2574 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 171908 SVRMSP MNC003-172015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 207 PM CDT WED JUL 17 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL MINNESOTA ...ANOKA SOUTHERN CHISAGO...AND NORTHERN WASHINGTON COUNTIES... AT 205 PM...A SEVERE THUNDERSTORM WAS LOCATED BETWEEN THE TOWNS OF BETHEL AND WYOMING IN ANOKA COUNTY OF EAST CENTRAL MINNESOTA...ABOUT 25 MILES NORTH OF DOWNTOWN ST PAUL. DAMAGING WINDS ARE LIKELY WITH THIS SEVERE THUNDERSTORM. MOVEMENT WAS TO THE EAST AT 20 MILES AN HOUR. CITIES AND TOWNS INCLUDED IN THIS WARNING ARE FOREST LAKE...CENTER CITY...BETHEL...AND WYOMING. 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. DOMBROWSKY
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, Jul 17, 12:30 PM CDT, 1 hour 37 minutes before
MNZ014-011-171830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 1230 PM CDT WED JUL 17 1991 ...SEVERE THUNDERSTORM WATCH THIS WEDNESDAY AFTERNOON AND EVENING UNTIL 7 PM CDT... AT 1228 PM CDT THUNDERSTORMS WERE SCATTERED ACROSS CENTRAL MINNESOTA. THE THUNDERSTORMS WERE LOCATED AT ALEXANDRIA AND EXTENDED SOUTHEAST TO COKATO...32 MILES SOUTH OF ST CLOUD. THE THUNDERSTORMS WERE MOVING EAST AT 20 TO 25 MPH AND WILL MOVE THROUGH THE COMMUNITIES OF ROUND PRAIRIE...RICHMOND AND PAYNESVILLE BETWEEN 1235 AND 1245 PM CDT. THE THUNDERSTORMS WILL HAVE HEAVY RAINFALLS...SMALL HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PLEASE MOVE INDOORS TO SAFE SHELTER IF THE THUNDERSTORMS APPROACH YOUR AREA. NNNN
Special weather statement, Jul 17, 12:55 PM CDT, 1 hour 12 minutes before
MNZ004-005-008-009-011-170500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1255 PM CDT WED JUL 17 1991 ...SEVERE THUNDERSTORM WATCH 686 UNTIL 700 PM...INCLUDES TWIN CITIES... ...TORRENTIAL RAINS AND STREET FLOODING LIKELY AROUND THE TWIN CITIES... AT 1245 AM...THUNNDERSTORMS WITH VERY HEAVY TO TORRENTIAL RAINFALL AND SMALL HAIL WERE SPREAD ACROSS THE TWIN CITIES...STREET FLOODING IS LIKELY FROM THESE THUNDERSTORMS...ESPECIALLY AROUND THE NORTHEERN HALF OF THE TWIN CITIES. OTHERWISE A BAND OF SHOWERS AND THUNDERSTORMS 50 MILES WIDE WAS DETECTED FROM EASTERN NORTH DAKOTA ACROSS CENTRAL MINNESOTA...THROUGH THE TWIN CITIES...OVER THROUGH PARTS OF WEST AND WEST CENTRAL WISCONSIN. THE THUNDERSTORMS WITH THE HEAVIEST SHOWERS AND SMALL HAIL WERE LOCATED BETWEEN ALEAXNDRIA AND LITTLE FALLS AROUND LONG PRAIRIE IN CENTRAL MINNESOTA...AND NEAR 1-694...FROM CORCORAN AND MAPLE GROVE OVER TO ROSEVILLE AND NORTH ST PAUL IN THE TWIN CITIES AND...FROM HUDSON SOUTHEAST TO ELLSWORTH AND DURAND IN WESTERN WISCONSIN. MOVEMENT WAS TO THE EAST AT 20 MILES AN HOUR. AS OF 1250 PM...NO SEVERE THUNDERSTORM WARNINGS WERE IN EFFECT...THE MAJOR THREAT AT THIS POINT IS THE DANGEROUS LIGHTNING AND POSSIBILITY OF STREET FLOODING ESPECIALLY AROUND THE TWIN CITIES.
Special weather statement, Jul 17, 12:58 PM CDT, 1 hour 9 minutes before
MNZALL-171900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1255 PM CDT WED JUL 17 1991 ...SEVERE THUNDERSTORM WATCH 686 UNTIL 700 PM...INCLUDES TWIN CITIES... ...TORRENTIAL RAINS AND STREET FLOODING LIKELY AROUND THE TWIN CITIES... AT 1245 AM...THUNNDERSTORMS WITH VERY HEAVY TO TORRENTIAL RAINFALL AND SMALL HAIL WERE SPREAD ACROSS THE TWIN CITIES...STREET FLOODING IS LIKELY FROM THESE THUNDERSTORMS...ESPECIALLY AROUND THE NORTHEERN HALF OF THE TWIN CITIES. OTHERWISE A BAND OF SHOWERS AND THUNDERSTORMS 50 MILES WIDE WAS DETECTED FROM EASTERN NORTH DAKOTA ACROSS CENTRAL MINNESOTA...THROUGH THE TWIN CITIES...OVER THROUGH PARTS OF WEST AND WEST CENTRAL WISCONSIN. THE THUNDERSTORMS WITH THE HEAVIEST SHOWERS AND SMALL HAIL WERE LOCATED BETWEEN ALEAXNDRIA AND LITTLE FALLS AROUND LONG PRAIRIE IN CENTRAL MINNESOTA...AND NEAR 1-694...FROM CORCORAN AND MAPLE GROVE OVER TO ROSEVILLE AND NORTH ST PAUL IN THE TWIN CITIES AND...FROM HUDSON SOUTHEAST TO ELLSWORTH AND DURAND IN WESTER WISCONSIN. MOVEMENT WAS TO THE EAST AT 20 MILES AN HOUR. AS OF 1250 PM...NO SEVERE THUNDERSTORM WARNINGS WERE IN EFFECT...THE MAJOR THREAT AT THIS POINT IS THE DANGEROUS LIGHTNING AND POSSIBILITY OF STREET FLOODING ESPECIALLY AROUND THE TWIN CITIES.
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 1:34 PM CDT | Severe Thunderstorm Warning | MPX | Stearns | 56 min |
| Jul 17, 2:02 PM CDT | Severe Thunderstorm Warning | MPX | Benton | 58 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1991Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.