Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 157, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 9, 1986, 4:48 PM CDT for Anoka County, Isanti County, Minnesota. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1986, 4:48 PM CDT (21:48 UTC)
- Expired
- Aug 9, 1986, 5:45 PM CDT
- In force
- 57 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Anoka County, MN, Isanti 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
Minneapolis, MN (KSTC), launched 12:00Z, 9.8 hours before the alert went out and 68 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2241 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 76 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 092148 SVRMSP MNC003-059-092245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 448 PM CDT SAT AUG 9 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF EAST CENTRAL MINNESOTA...NORTHERN ANOKA AND SOUTHERN ISANTI AT 437 PM CDT A SEVERE THUNDERSTORM WAS MOVING THRU ANOKA AND ISANTI COUNTIES AND THE ANOKA SHERIFF REPORTED TREES DOWN NEAR LAKE GEORGE PARK WHICH IS JUST NORTH OF ANOKA. THESE SEVERE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MILES AN HOUR. REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE HAIL AND FREQUENT L}IGHTNING 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. HALDEMAN
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, Aug 9, 2:56 PM CDT, 1 hour 52 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 250 PM CDT SAT AUG 9 1986 ...INTENSE LINE OF POWERFUL THUNDERSTORMS DEVELOPES RAPIDLY OVER NORTHERN AND CENTRAL MINNESOTA... INTENSE THUNDERSTORMS HAVE DEVELOPED RAPIDLY ALONG A LINE THAT EXTENDED FROM THE SOUTH DAKOTA BORDER NEAR ORTONVILLE MINNESOTA..NORTHEAST THROUGH ALEXANDRIA..BRAINERD AND INTO THE NORTHEAST ARROWHEAD SECTION OF MINNESOTA. AT 340 PM CDT..THE STRONGEST THUNDERSTORMS WERE LOCATED NEAR ALEXANDRIA AND JUST NORTHWEST OF BRAINERD. THESE THUNDERSTORMS HAVE BEEN PRODUCING STRONG WINDS..PEA TO MARBLE SIZE HAIL AND FREQUENT LIGHTNING STRIKES AS THEY MOVE EAST AT 25 MILES AN HOUR. OTHER WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE BUILDING OUT AHEAD OF THIS LINE MAINLY OVER SOUTH CENTRAL AND EAST CENTRAL MINNESOTA. THE STRONGEST THUNDERSTORMS IN THIS AREA WERE ABOUT 30 MILES SOUTHWEST OF DULUTH NEAR MOOSE LAKE AND BETWEEN ST CLOUD AND THE TWIN CITIES IN THE BUFFALO AREA. MOVEMENT HERE WAS NORTHEAST AT 25 TO 30 MILES AN HOUR. ..A TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF CENTRAL AND SOUTHWEST MINNESOTA UNTIL 730PM.. SWANBERG
Special weather statement, Aug 9, 3:54 PM CDT, 54 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 350 PM CDT SAT AUG 9 1986 ...STRONG THUNDERSTOMS CONTINUE OVER PORTIONS OF CENTRAL MINNSOTA... VERY STRONG THUNDERSTORMS CONTINUED TO MOVE SOUTHEAST THROUGH CENTRAL MINNESOTA. THE STORMS STRETCHED ACROSS THE STATE FROM LAKE SUPERIOR.. NORTH OF DULUTH..INTO WEST CENTRAL MINNESTOA..NORTH OF ST. CLOUD AND SOUTH OF ALEXANDRIA. THESE THUNDERSTORMS HAVE BEEN PRODUCING HAIL..STRONG GUSTY WINDS AND FREQUENT LIGHTENING. A WARNING WAS ISSUED FOR TODD COUNTY IN CENTRAL MINNESOTA AND WILL EXPIRE AT 400 PM CDT. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 25 TO 30 MPH..WHILE AT THE SAME TIME OTHER..WIDELY SCATTERED THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST PORTIONS OF THE STATE AND MOVING NORTHEAST AT 20 TO 25 MPH. THE STRONGEST OF THE STORMS IN THE SECOND AREA WERE LOCATED NEAR MONTICELLO..NORTHWEST OF THE TWIN CITIES. ..A TORNADO W:ATCH HAS BEEN ISSUED FOR MUCH OF CENTRAL AND SOUTHWEST MINNESOTA UNTIL 730PM.. HALDEMAN
Special weather statement, Aug 9, 4:17 PM CDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 415 PM CDT SAT AUG 9 1986 ...STRONG THUNDERSTOMS DEVELOPING RAPIDLY IN THE NORTHWESTERN TWIN CITIES SUBURBS... AT 415 PM A COUPLE OF VERY STRONG THUNDERSTORMS WERE DEVLOPING OVER THE INDEPENDENCE AREA OF WESTERN HENEPIN COUNTY AND JUST NORTH OF ANOKA IN ANOKA COUNTY. THESE THUNDERSTORMS MAY PRODUCE SOME STRONG GUSTY WINDS..PEA TO MARBLE SIZE HAIL AND VERY TURBULMENT WEATHER CONDITIONS OVER THE NORTHERN PORTIONS OF THE TWIN CITIES DURING THE NEXT 45 MINUTES. THE STORMS WERE MOVING TO THE NORTHEAST AT 25 MPH. HALDEMAN
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:00 PM CDT | Severe Thunderstorm Warning | MPX | Todd | 60 min |
| Aug 9, 4:20 PM CDT | Severe Thunderstorm Warning | MPX | Sherburne, Stearns | 60 min |
| Aug 9, 4:45 PM CDT | Severe Thunderstorm Warning | MPX | Meeker | 45 min |
| Aug 9, 5:15 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs, Sherburne | 60 min |
| Aug 9, 5:24 PM CDT | Severe Thunderstorm Warning | MPX | Wright | 36 min |
| Aug 9, 6:25 PM CDT | Severe Thunderstorm Warning | MPX | Anoka | 35 min |
| Aug 9, 6:30 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Wright | 45 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.