Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 105, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 18, 1986, 6:25 PM CDT for Chisago County, Minnesota; Polk County, Wisconsin. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1986, 6:25 PM CDT (23:25 UTC)
- Expired
- Jul 18, 1986, 7:20 PM CDT
- In force
- 55 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.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 11.4 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
- 2817 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 182331 COR SVRMSP MNC025-WIC095-005-107-190020- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 625 PM CDT FRI JUL 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 720 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MINNESOTA...CHISAGO WEST CENTRAL WISCONSIN...POLK...BARRON AND RUSK AT.....620 RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS THAT EXTENDED FROM SOUTHERN CHISAGO COUNTY..ACROSS POLK .. BARRON AND RUSK COUNTIES OF WISCONSIN. AT 620 PM MARBLE SIZED HAIL WAS REPORTED AT TURTLE LAKE IN WESTERN BARRON COUNTY. THE STORMS ARE MOVING EAST AT ABOUT 25 MILES AN HOUR. THE CITIES OF AMERY..TURTLE LAKE..AND LADYSMITH ARE IN THE STORMS PATH. 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. RICHARDSON
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, Jul 18, 1:12 PM CDT, 5 hours 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 110 PM CDT FRI JUL 18 1986 ...HOT AND HUMID WEATHER CONTINUES OVER SOUTHERN MINNESOTA TODAY... TEMPERTURES IN SOUTHERN MINNESOTA WILL BE IN THE UPPER 80S TO LOWER 90S THIS AFTERNOON PUSHING THE APPARENT TEMPERATURE...OR HEAT INDEX...TO BETWEEN 95 AND 105 DEGREES..WITH ISOLATED READINGS SLIGHTLY ABOVE THE 105 DEGREE MARK. THE APPARENT TEMPERATURE...OR HEAT INDEX...IS A MEASURE OF THE CONTRIBUTION HUMIDITY MAKES WITH HIGH TEMPERATURES TO REDUCE THE HUMAN BODYS ABILITY TO COOL ITSELF. THERE COULD BE..SLIGHT..RELIEF ON SATURDAY...BUT IN GENERAL THE WARM AND HUMID AIR IS EXPECTED BE AROUND UNTIL SUNDAY...WHEN COOLER AIR IS EXPECTED TO PUSH IN FROM THE NORTHWEST. THOSE PEOPLE WHO ARE WORKING OUT OF DOORS...THOSE LIVING IN UNAIRCONDITIONED SPACES...THE ELDERLY...AND PEOPLE IN POOR HEALTH SHOULD TAKE PRECAUTIONS AS PROLONGED EXPOSURE TO THESE CONDITIONS CAN LEAD _TO HEAT EXHAUSTION OR POSSIBLE HEAT STROKE. WILLIS
Special weather statement, Jul 18, 5:30 PM CDT, 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MN 530 PM CDT FRI JUL 18 1986. ...SEVERE THUNDERSTORM WATCH FOR EAST CENTRAL MINNESOTA UNTIL 10 PM CDT... ...SEVERE THUNDERSTORM WARNING FOR SHERBURNE UNTIL 6 PM CDT AT 5 30 PM CDT RADAR SHOWED THE STRONGEST STORM IN EXTREME SOUTHERN MILLE LACS COUNTY AND EASTERN SHERBURNE COUTNY MOVING EAST AT 25 MPH. 1/2 INCH HAIL AND WINDS OF 50 TO 55 MPH HAVE BEEN REPORTED FROM THESE STORMS rBY THE PRINCETON RADIO STATION AT 520 PM CDT RUBIN/NISTLER
Special weather statement, Jul 18, 5:50 PM CDT, 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MN 550 PM CDT FRI JUL 18 1986. ...SEVERE THUNDERSTORM WATCH FOR EAST CENTRAL MINNESOTA UNTIL 10 PM CDT... ...SEVERE THUNDERSTORM WARNING FOR SHERBURNE UNTIL 6 PM CDT HAS BEEN CANCELED... AT 5 50 PM CDT RADAR SHOWED THE STRONG THUNDERSTORMS HAVE MOVED EAST OF SHERBURNE COUNTY. 1/2 INCH HAIL AND WINDS OF 50 TO 55 MPH HAD BEEN REPORTED FROM THESE STORMS BY THE PRINCETON RADIO STATION AT 520 PM CDT RUBIN/NISTLER
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 4:54 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 36 min |
| Jul 18, 5:00 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne | 60 min |
| Jul 18, 5:23 PM CDT | Tornado Warning | MPX | Ramsey, Washington | 27 min |
| Jul 18, 5:48 PM CDT | Tornado Warning | MPX | Anoka, Ramsey, Washington | 32 min |
| Jul 18, 5:48 PM CDT | Tornado Warning | MPX | Hennepin | 32 min |
| Jul 18, 6:40 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 65 min |
| Jul 18, 6:25 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Rusk | 55 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1986Severe Thunderstorm Warnings in Wisconsin, 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; the sounding from the Mesonet's radiosonde archive.