Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 71, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 21, 1986, 7:12 PM CDT for Hennepin County, Minnesota. It was in force for 38 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 21, 1986, 7:12 PM CDT (00:12 UTC)
- Expired
- Jun 21, 1986, 7:50 PM CDT
- In force
- 38 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Hennepin 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 21, 7:50 PM CDT | Thunderstorm Wind 0 | Hennepin, 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
Aberdeen, SD (KHON), launched 00:00Z, 0.2 hours before the alert went out and 388 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
- 3109 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1356 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 220015 COR SVRMSP MNC053-003-059-220150- BULLETIN - IMMEDIATE BROADCAST REQUESTED CORRECTED FOR EXPIRE TIME SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 712 PM CDT SAT JUN 21 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 750 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MINNESOTA...NORTHERN HENNEPIN...ANOKA AND SOUTHERN ISANTI AT 700 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY RADAR IN SOUTHEAST SHERBURNE COUNTY NORTH OF BIG LAKE NORTHEAST TO PINE BROOK IN CENTRAL ISANTI COUNTY. WINDS FROM 60 TO 70 MPH CAN BE EXPECTED WITH HIGHER GUSTS POSSIBLE. SOME CITIES IN THE PATH OF THIS SEVERE THUNDERSTORM ARE ANOKA... ELK RIVER AND ISANTI MINNESOTA. MOVEMENT WAS SOUTHEAST 40 MILES AN HOUR AND SHOULD ENTERING NORTHERN HENNEPIN COUNTY BY 730 PM CDT. REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE HAIL AND FREQUENT LIGHTNING STRIKES. ALSO SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED. TOGSTAD.
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 7:12 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Isanti | 38 min |
| Jun 21, 8:49 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 31 min |
| Jun 21, 11:05 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin, Ramsey | 40 min |
| Jun 21, 11:11 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Scott | 34 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1986Every severe thunderstorm warning in 1986
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.