Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 99, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 1991, 1:34 PM CDT for Stearns County, Minnesota. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1991, 1:34 PM CDT (18:34 UTC)
- Expired
- Jul 17, 1991, 2:30 PM CDT
- In force
- 56 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Stearns County, MN
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 6.6 hours before the alert went out and 111 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 KSTC 171834 SVRSTC MNC145-171930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 134 PM CDT WED JUL 17 1991 THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 230 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL MINNESOTA ...EASTERN STEARNS COUNTY AT 1 30 PM CDT RADAR INDICATED A THUNDERSTORM ENTERING STEARNS COUNTY 25 MILES NORTHWEST OF ST. CLOUD. THIS THUNDERSTORM COULD CONTAIN LARGE HAIL...VERY HEAVY RAIN...AND FREQUENT LIGHTNING STRIKES. THIS THUNDERSTORM WAS MOVING SOUTHEAST AT 20 MPH. SOME TOWNS IN THE PATH OF THIS THUNDERSTORM ARE HOLDINGFORD...ALBANY...AVON...AND ST. CLOUD. THIS THUNDERSTORM WILL MOVE THROUGH THESE TOWNS BY 2 30 PM CDT. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNwLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. NNNN
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 4 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, 39 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, 36 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, 2:02 PM CDT | Severe Thunderstorm Warning | MPX | Benton | 58 min |
| Jul 17, 2:07 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Washington | 33 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; the sounding from the Mesonet's radiosonde archive.