Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 40, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 12, 1990, 5:02 PM CDT for Blue Earth County, Le Sueur County, Minnesota. It was in force for 28 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
- Jun 12, 1990, 5:02 PM CDT (22:02 UTC)
- Expired
- Jun 12, 1990, 5:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Blue Earth County, MN, Le Sueur County, MN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 5:30 PM CDT | Thunderstorm Wind 0 | Le Sueur, 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, 10.0 hours before the alert went out and 76 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
- 966 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 781 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KRST 122203
SVRRST
MNC013-079-122230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
502 PM CDT TUE JUN 12 1990
THE NATIONAL WEATHER SERVICE IN ROCHESTER HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH CENTRAL MINNESOTA
...NORTHERN BLUE EARTH...LE SUEUR
AT 4:50 PM 70 MPH WINDS WERE REPORTED IN MANKATO MN. THE SEVERE
THUNDERSTORM IS MOVING RAPIDLY NORTHEAST AT 40 MPH. THIS WARNING
INCLUDES THE TOWN OF LE CENTER MN...
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
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.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS O`F 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 12:38 AM CDT | Severe Thunderstorm Warning | MPX | Pope, Stearns | 37 min |
| Jun 12, 1:10 AM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 35 min |
| Jun 12, 4:45 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Sibley | 60 min |
| Jun 12, 5:01 PM CDT | Severe Thunderstorm Warning | MPX | Scott | 44 min |
| Jun 12, 5:34 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Ramsey | 41 min |
| Jun 12, 5:55 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 50 min |
| Jun 12, 6:03 PM CDT | Severe Thunderstorm Warning | MPX | Rice | 27 min |
| Jun 12, 6:13 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 32 min |
| Jun 12, 6:29 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 31 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1990Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.