Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 81, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 4, 1986, 3:08 AM CDT for Polk County, Wisconsin; Chisago County, Minnesota. It was in force for 52 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
- Jul 4, 1986, 3:08 AM CDT (08:08 UTC)
- Expired
- Jul 4, 1986, 4:00 AM CDT
- In force
- 52 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Chisago County, MN, Polk County, WI
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 4, 3:58 AM CDT | Thunderstorm Wind 0 | Polk, WI |
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, 8.1 hours before the alert went out and 101 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
- 127 J/kg
- Mixed-layer CIN
- -476 J/kg
- Mixed-layer LCL
- 1640 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 220 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 040808 SVRMSP MNC025-WIC095-040900- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 308 AM CDT FRI JUL 4 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MINNESOTA...CHISAGO WEST CENTRAL WISCONSIN...POLK AT 305 AM CDT A SEVERE THUNDESTORM WAS INDICATED BY RADAR JUST NORTH OF CAMBRIDGE IN EAST CENTRAL MINNESOTA...50 MILES NORTH OF THE TWIN CITIES. THE SEVERE THUNDERSTORM WAS MOVING TOWARD THE EAST AT 50 MPH. EXPECT LARGE HAIL AND DAMAGING WINDS. REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE HAIL AND wFREQUENT 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. NAISTAT
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 2:05 AM CDT | Severe Thunderstorm Warning | MPX | Mille Lacs, Morrison | 30 min |
| Jul 4, 6:30 AM CDT | Severe Thunderstorm Warning | MPX | Todd | 45 min |
| Jul 4, 7:00 AM CDT | Severe Thunderstorm Warning | MPX | Morrison | 60 min |
| Jul 4, 7:30 AM CDT | Severe Thunderstorm Warning | MPX | Mille Lacs, Morrison | 60 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1986Severe 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.