Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 74, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 21, 1986, 11:05 PM CDT for Anoka County, Hennepin County, Ramsey County, Minnesota. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jun 21, 1986, 11:05 PM CDT (04:05 UTC)
- Expired
- Jun 21, 1986, 11:45 PM CDT
- In force
- 40 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.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 4.1 hours before the alert went out and 386 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
- 2227 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 719 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 220405 SVRMSP MNC053-003-123-220445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 1105 PM CDT SAT JUN 21 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MINNESOTA...HENNEPIN...SOUTHERN ANOKA AND RAMSEY AT 1100 PM CDT...A SEVERE THUNDERSTORM WAS REPORTED OVER NORTHWEST HENNEPIN COUNTY...WITH TREES DOWN AND OTHER DAMAGE REPORTED AROUND MAPLE PLAIN. RADAR INDICATED THIS SEVERE THUNDERSTORM WAS MOVING TO THE EAST AT 35 MILES AN HOUR. THIS WARNING INCLUDES THE CITIES OF MINNEAPOLIS/ST PAUL AND SUBURBS. 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 OF8 SAFETY IF ONE IS SPOTTED.
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, Jun 21, 7:57 PM CDT, 3 hours 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 755 PM CDT SAT JUN 21 1986 A LINE OF STRONG THUNDERSTORMS IS ROLLING THROUGH ANOKA..HENNEPIN AND RAMSEY COUNTY. THE LEADING EDGE OF THESE STORMS HAS A ROLL SHAPED CLOUD ASSOCIATED WITH IT. PERSONS IN ANOKA..HENNEPIN AND RAMSEY COUNTY CAN ANTICIPATE WIND GUSTS IN EXCESS OF 50 MPH IN SOME OF THESE STORMS AS THEY PASS ACROSS THEIR AREA ALONG WITH SOME HAIL. THE THREAT OF THESE STRONG WINDS IS EXPECTED TO PERSIST UNTIL ABOUT 9 PM CDT THIS SATURDAY EVENING. TOGSTAD
Special weather statement, Jun 21, 8:19 PM CDT, 2 hours 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 820 PM CDT SAT JUN 21 1986 A LINE OF STRONG THUNDERSTORMS IS ROLLING THROUGH SAINT CROIX..BARRON AND DUNN COUNTIES OF WISCONSIN. THE HISTORY OF THESE THUNDERSTORMS INCLUDES SOME HAIL AND BRIEF WIND GUSTS IN EXCESS OF 50 MPH. VERY HEAVY RAIN IS OCCURRING WITH THESE THUNDERSTORMS AND SOME BRIEF ROADWAY FLOODING IS QUITE LIKELY IN SOME AREAS..PARTICULARLY IN LOW APPROACH RAMPS TO HIGHWAYS AND UNDER SOME BRIDGES. MOTORISTS SHOULD SLOW IT DOWN IN THESE AREAS OF HEAVY RAINS. THIS ACTIVITY SHOULD LAST IN THESE COUNTIES TIL AROUND 915 PM CDT THIS SATURDAY EVENING. TOGSTAD
Local storm report, Jun 21, 9:00 PM CDT, 2 hours 5 minutes before
STORM REPORT..PRELIMINARY NATIONAL WEATHER SERVICE ST CLOUD MN 800 PM CDT SAT JUN 21 1986 TIME EVENT 500 PM CDT EST 60 MPH WIND..VERY HEAVY RAIN..PEA SIZE HAIL AT STARBUCK IN POPE COUNTY..70 MILES WEST OF ST CLOUD. 513 PM CDT 12 TREES DOWN NEAR GLENWOOD IN POPE COUNTY..60 MILES WEST OF ST CLOUD. 555 PM CDT WALL CLOUD REPORTED BY TRAINED SPOTTER 15 MILES NORTHWEST OF ST CLOUD. 620 PM CDT 3 BOATS OVER TURNED ON MILLE LACS LAKE..NORTHEAST OF ST CLOUD. 644 PM CDT HAIL 3/4 INCH TO GOLF BALL SIZE AND EST 55 TO 60 MPH WIND AT WILLMAR IN KANDIYOHI COUNTY..50 MILES SOUTHWEST OF ST CLOUD. 715 PM CDT HAIL 3/4 INCH 5 MILES WEST OF PRINCETON IN SHERBURNE COUNTY..30 MILES EAST OF ST CLOUD. NUMEROUS REPORTS THROUGHT OUT CENTRAL MINNESOTA OF VERY HEAVY RAIN AND PEA SIZE HAIL AND BRIEF GUSTY WIND..ST CLOUD RECORDED .80 INCHES OF RAIN IN 30 MINUTES..530 PM TO 600 PM CDT. FRASER
Special weather statement, Jun 21, 9:39 PM CDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 935 PM CDT SAT JUN 21 1986 THE POLICE REPORT AREA HIGHWAYS SOUTH OF OLIVIA IN RENVILLE COUNTY ARE COVERED WITH PEA SIZED HAIL. AN INTENSE THUNDERSTORM CONTINUES TO CRANK OUT VERY HEAVY RAIN AND SMALL HAIL IN EASTERN RENVILLE COUNTY AND THE STORM IS MOVING EASTWARD AT 30 TO 35 MPH. A SEVERE THUNDERSTORM WARNING FOR NORTHERN REDWOOD AND RENVILLE COUNTY WAS ALLOWED TO EXPIRE AS OF 920 PM CDT. HOWEVER..BOTH EAST RENVILLE COUNTY CAN EXPECT TO CONTINUE ITS SMALL HAIL POUNDING FOR THE NEXT 20 MINUTES WITH THESE CONDITIONS MOVING INTO WESTERN SIBLEY AND MC LEOD COUNTY BETWEEN 945 PM CDT AND 1020 PM CDT THIS SATURDAY EVENING. TOGSTAD
Special weather statement, Jun 21, 10:23 PM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1020 PM CDT SAT JUN 21 1986 ...A SECOND ROUND OF HEAVY THUNDERSTORM ACTIVITY FOR EASTCENTRAL MINNESOTA AND THE TWIN CITIES METRO AREA... RADAR SHOWS A NEW LINE OF THUNDERSTORMS..FROM SOUTHERN SHERBURNE SOUTHEST ACROSS MCLEOD COUNTY THEN ON TO WESTERN SIBLEY COUNTY AS OF 1015 PM CDT THIS SATURDAY EVENING. VERY HEAVY RAIN..PEA TO MARBLE SIZE HAIL AND WIND GUSTS TO AROUND 50 MPH ARE REPORTED WITH THIS NEW THUNDERSTORM ACTIVITY FROM THE SIBLEY COUNTY SHERIFF AT AROUND 1011 PM CDT. SINCE THE ENTIRE LINE OF THUNDERSTORMS HAS SIMILAR CHARACTERISTICS ON RADAR..SIMILAR CONDITIONS TO THOSE REPORTED IN SIBLEY COUNTY CAN BE ANTICIPTATED FOR MOST OF EASTCENTRAL MINNESOTA..INCLUDING THE TWIN CITIES FROM 10 30 PM CDT UNTIL 12 30 PM CDT ON SUNDAY MORNING. THESE STORMS WILL PROBABLY SET OFF ANOTHER ROUND OF STEET AND UNDER PASS FLOODING IN THE METRO AREA. MOTORISTS ARE ADVISED TO ANTICIPATE THESE PROBLEMS ONCE AGAIN. A GREAT DEAL OF INTENSE LIGHTNING..MUCH OF OF DANGEROUS CLOUD TO GROUND IS REPORTED WITH THIS ACTIVITY. STAY AWAY FROM WINDOWS AS THESE STORMS PASS YOUR AREA. TOGSTAD
Special weather statement, Jun 21, 10:55 PM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1045 PM CDT SAT JUN 21 1986 ...DANGEROUS THUNDERSTORMS CONTINUED TO MOVE ACROSS PARTS OF SOUTHERN MINNESOTA INTO WEST CENTRAL WISCONSIN... A SEVERE THUNDERSTORM WARNING WAS ISSUED FOR THE SOUTHWEST MINNESOTA COUNTY OF NOBLES. A SOLID LINE OF THUNDERSTORMS WITH HEAVY TO LOCALLY INTENSE RAINFALL... SMALL HAIL...STONG GUSTY WINDS AND DANGEROUS LIGHTNING...REACHED ACROSS WEST SECTIONS OF THE TWIN CITIES METRO AREA...FROM AROUND ANOKA ACROSS WEST HENNEPIN COUNTY THRU WACONIA TO JORDAN AND TO NORTH OF MANKATO. THUNDERSTORMS WITH HEAVY TO VERY HEAVY RAINS WERE ALSO SCATTERED ACROSS SOUTHERN SECTIONS OF THE TWIN CITIES METRO AREA INTO WEST CENTRAL WISCONSIN AROUND RIVER FALLS AND ELLSWORTH. THE HEAVY TO LOCALLY INTENSE RAINS CAN PRODUCE RAPID ACCUMULATION OF WATER ON ROADS AND LOW LYING AREAS...INCLUDING UNDERPASSES. A BROAD AREA O2F SHOWERS AND THUNDERSTORMS EXTENDED NORTH OF THIS AREA ACROSS NORTHWEST WISCONSIN AND PARTS OF EAST CENTRAL MINNESOTA. MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR. DOM
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, 7:12 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 38 min |
| Jun 21, 8:49 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 31 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; the sounding from the Mesonet's radiosonde archive.