Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 90, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 1993, 7:09 AM CDT for Pierce County, Wisconsin. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Aug 18, 1993, 7:09 AM CDT (12:09 UTC)
- Expired
- Aug 18, 1993, 8:15 AM CDT
- In force
- 66 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Pierce County, WI
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 0.2 hours before the alert went out and 94 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
- 12 J/kg
- Mixed-layer CIN
- -421 J/kg
- Mixed-layer LCL
- 1027 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 181210 SVRMSP WIC093-095-109-181315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 709 AM CDT WED AUG 18 1993 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL WISCONSIN ...PIERCE COUNTY...POLK COUNTY...ST CROIX COUNTY AT 710 AM..A LINE OF SEVERE THUNDERSTORMS WAS APPROACHING THE ST CROIX RIVER VALLEY. THIS LINE OF THUNDERSTORMS WAS MOVING EAST AT 30 MILES AN HOUR AND CONTAIN DAMAGING WINDS...TORRENTIAL RAINS AND DANGEROUS LIGHTNING. POWER OUTAGES AND URBAN FLOODING HAVE ALSO BEEN PRODUCED WITH THIS LINE OF STORMS. SOME TOWNS IN THE PATH OF THESE STORMS INCLUDE BALSAM LAKE..HUDSON.. ..GLENWOOD CITY AND ELLSWORTH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...LARGE HAIL... DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM. PEOPLE IN MOBILE HOMES SHOULD GO TO A STORM SHELTER.
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 18, 6:15 AM CDT, 54 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS MN 615 AM CDT TUE AUG 18 1993 ...SEVERE THUNDERSTORM WARNING FOR EASTERN WRIGHT COUNTY AND NORTHERN... CARVER.... AN AREA OF SHOWERS AND THUNDERSTORMS CONTINUES MOVING ACROSS CENTRAL AND SOUTHERN MINNESOTA. A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM WASECA AND OWATANNA NORTH THROUGH LITCHFIELD...WACONIA...BUFFALO...ROGERS ELK RIVER TO NEAR CAMBRIDGE IN EAST CENTRAL MINNESOTA. THESE SEVERE THUNDERSTORMS HAVE BEEN PRODUCING VERY HEAVY RAIN...STRONG GUSTY WINDS FREQUENT LIGHTNING AND SMALL HAIL. PEOPLE IN THE PATH OF THESE THUNDERSTORMS SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY WHEN THREATENING WEATHER APPROACHES. A LARGER AREA OF RAIN WAS JUST SOUTH OF DULUTH THROUGH THE WESTERN PARTS OF THE TWIN CITIES ON SOUTH TO WASECA AND OWASTANNA. MOVEMENT WAS EAST AT 35 MILES AN HOUR. DME
Special weather statement, Aug 18, 6:27 AM CDT, 42 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS MN 615 AM CDT TUE AUG 18 1993 ...SEVERE THUNDERSTORM WARNING FOR EASTERN WRIGHT COUNTY AND NORTHERN... CARVER.... AN AREA OF SHOWERS AND THUNDERSTORMS CONTINUES MOVING ACROSS CENTRAL AND SOUTHERN MINNESOTA. A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM WASECA AND OWATANNA NORTH THROUGH LITCHFIELD...WACONIA...BUFFALO...ROGERS ELK RIVER TO NEAR CAMBRIDGE IN EAST CENTRAL MINNESOTA. THESE SEVERE THUNDERSTORMS HAVE BEEN PRODUCING VERY HEAVY RAIN...STRONG GUSTY WINDS FREQUENT LIGHTNING AND SMALL HAIL. PEOPLE IN THE PATH OF THESE THUNDERSTORMS SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY WHEN THREATENING WEATHER APPROACHES. A LARGER AREAB OF RAIN WAS JUST SOUTH OF DULUTH THROUGH THE WESTERN PARTS OF THE TWIN CITIES ON SOUTH TO WASECA AND OWASTANNA. MOVEMENT WAS EAST AT 35 MILES AN HOUR. DME
Special weather statement, Aug 18, 6:50 AM CDT, 19 minutes before
MNZALL-181500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 650 AM CDT WED AUG 18 1993 SEVERE URBAN FLOODING IS REPORTED AT EXCELSIOR MINNESOTA ON LAKE MINNETONKA. ON SHADY OAK ROAD WATER IS UP TO THE HOOD OF CARS AND REPORTEDLY HAS PONDED. AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS VALID FOR THE TWIN CITIES METRO AREA THIS MORNING. WET
Special weather statement, Aug 18, 6:57 AM CDT, 12 minutes before
MNZALL-181500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 650 AM CDT WED AUG 18 1993 SEVERE URBAN FLOODING IS REPORTED AT EXCELSIOR MINNESOTA ON LAKE MINNETONKA. ON SHADY OAK ROAD WATER IS UP TO THE HOOD OF CARS AND REPORTEDLY HAS PONDED. AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS VALID FOR THE TWIN CITIES METRO AREA THIS MORNING. WET
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:09 AM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 66 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1993Every severe thunderstorm warning in 1993
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.