Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 88, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 1990, 4:09 AM CDT for Anoka County, Hennepin County, Ramsey County, Minnesota. It was in force for 66 min. 3 reports 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, 1990, 4:09 AM CDT (09:09 UTC)
- Expired
- Jul 17, 1990, 5:15 AM CDT
- In force
- 66 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Anoka County, MN, Hennepin County, MN, Ramsey 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 |
|---|---|---|---|
| Jul 17, 4:20 AM CDT | Hail 1 | Hennepin, MN | |
| Jul 17, 4:25 AM CDT | Hail 0.75 | Anoka, MN | |
| Jul 17, 4:35 AM CDT | Thunderstorm Wind 0 | Ramsey, 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 00:00Z, 9.2 hours before the alert went out and 38 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
- 6 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 2107 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 44 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 170910
SVRMSP
MNC003-053-123-171015-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
409 AM CDT TUE JUL 17 1990
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN EAST CENTRAL MINNESOTA
...ANOKA...EASTERN HENNEPIN...RAMSEY
AT 405 AM CDT..WEATHER RADAR WAS INDICATING SEVERE THUNDERSTORMS
MOVING INTO WESTERM PARTS OF THE TWIN CITIES METROPOLITAN AREA.
THESE THUNDERSTORMS WERE IN A LINE FROM ANOKA TO SOUTH MINNEAPOLIS.
SOME CITIES IN THE PATH OF THESE STORMS..MINNEAPOLIS..ST PAUL..FRIDLEY
AND WHITE BEAR LAKE. THEY WERE MOVING EAST AT 30 MPH.
WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSIDE A STRONG BUILDING
DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY. REMEMBER SEVERE THUNDERSTORMS
CAN AND OCCASIONALLY DO PRODUCE TORNADOS WITH LITTLE OR NO WARNING.The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:29 PM CDT | Tornado Warning | MPX | Watonwan | 31 min |
| Jul 17, 2:01 AM CDT | Severe Thunderstorm Warning | MPX | McLeod, Sibley | 44 min |
| Jul 17, 3:44 AM CDT | Severe Thunderstorm Warning | MPX | Benton | 46 min |
| Jul 17, 5:02 AM CDT | Severe Thunderstorm Warning | MPX | Anoka, Isanti | 58 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.