Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 114, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 16, 1987, 1:25 AM CDT for Mower County, Olmsted County, Minnesota. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- Aug 16, 1987, 1:25 AM CDT (06:25 UTC)
- Expired
- Aug 16, 1987, 2:15 AM CDT
- In force
- 50 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Mower County, MN, Olmsted 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 00:00Z, 6.4 hours before the alert went out and 139 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
- 1675 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1435 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KRST 160625
SVRRST
MNC099-109-160715-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
125 AM CDT SUN AUG 16 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 215 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST MINNESOTA
...MOWER...OLMSTED
INCLUDING THE CITIES OF ROCHESTER AND AUSTIN.
AT 124 AM CDT A WIND GUST OF 64 MPH WAS RECORDED AT THE ROCHESTER
AIRPORT.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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 15, 9:45 PM CDT, 3 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST. CLOUD MN 945 PM CDT SAT AUG 15 1987 ...STRONG THUNDERSTORMS MOVING TOWARDS MILLE LACS LAKE... ...TORNADO WATCH FOR CENTRAL MINNESOTA UNTIL 2 AM CDT... AT 945 PM CDT A LINE OF STRONG THUNDERSTORMS WAS LOCATED BY RADAR FROM WESTERN EDGE OF MILLE LACS LAKE SOUTHWEST TO REDWOOD FALLS. THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING GUSTY WINDS... HAIL...FREQUENT LIGHTNING STRIKBES AND BRIEF HEAVY RAIN. THESE THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND WILL BE AFFECTING THE LAKE AREA UNTIL 11 PM CDT. BOATERS...FISHERPERSONS...CAMPERS AND OTHERS IN THE MILLE LACS LAKE AREA SHOULD TAKE NECESSARY PRECAUTIONS. YOUNG
Local storm report, Aug 15, 10:16 PM CDT, 3 hours 9 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
1015 PM CDT SAT AUG 15 1987
...ATTN CELS...
PRELIMINARY STORM REPORT FROM ST. CLOUD MINNESOTA
804 PM CDT UNCONFIRMED FUNNEL CLOUD 1 MILE WEST OF BROWERVILLE
MINNESOTA IN TODD COUNTY...28 MILES NORTHEAST OF
ALENANDRIA.
815 PM CDT POWER LINES DOWN FROM EST 60 MPH WIND AT EAGLE BEND IN
TODD COUNTY...25 MILES NORTHEAST OF ALEXANDRIA.
POWER LINES DOWN AND TREES DOWN AT HEWITT IN TODD COUNTY
...35 MILES NORTHEAST OF ALEXANDRIA.
825 PM CDT GUST ESTIMATED TO 60 MPH. VISIBILITY NEAR ZERO WITH
HEAVY RAIN AT BROOTEN MINNESOTA IN STEARNS COUNTY...45
MILES WEST OF ST. CLOUD.
914 PM CDT POWER LINES AND TREES DOWN AT NEW LONDOW AND SPICER IN
KANDIYOHI COUNTY...10 TO 15 MILES NORTHEAST OF WILLMAR.
915 PM CDT POWER LINES AND TREES DOWN WITH 50 TO 60 MPH WIND AT
PIERZ MINNESOTA INV MORRISON COUNTY...25 MILES SOUTH OF
BRAINERD.
FRASERSpecial weather statement, Aug 15, 10:44 PM CDT, 2 hours 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1040 PM CDT SAT AUG 15 1987
...TORNADO WATCH NUMBER 482 CANCELED FOR NORTHERN MINNESOTA BUT
CONTINUES IN EFFECT FOR SOUTHERN MINNESOTA...
THE NATIONAL WEATHER SERVICE HAS CANCELED TORNADO WATCH NUMBER
482 FOR NORTHERN MINNESOTA ROUGHLY NORTH OF A LINE EXTENDING FROM
A POINT 30 MILES WEST NORTHWEST OF ALEXANDRIA MINNESOTA TO A POINT
45 MILES EAST NORTHEAST OF ST. CLOUD MINNESOTA. WHILE SHOWERS AND
THUNDERSTORMS WILL CONTINUE IN NORTHERN MINNESOTA THEY SHOULD REMAIN
BELOW SEVERE LIMITS.
TORNADO WATCH NUMBER 482 REMAINS IN EFFECT FOR MUCH OF SOUTHERN
MINNESOTA UNTIL 2 AM CDT. COUNTIES STILL IN THE WATCH ARE...
<
WESTCENTRAL.........GRANT..DOUGLAS..STEVENS..
POPE..BIG STONE..SWIFT..LAC QUI PARLE..CHIPPEWA..
YELLOW MEDICINE
<
CENTRAL.......TODD..MORRISON..
STEARNS..BENTON..SHERBURNE..KANDIYOHI..MEEKER..WRIGHT..
RENVILLE..MCLEOD..SIBLEY
EASTCENTRAL.........NORTHWEST PINE..MILLE LACS...
KANABEC..NORTHWEST ISANTI
SOUTHWEST..........LINCOLN..LYON..REDWOOD..BROWN..PIPESTONE..MURRAY..
COTvTONWOOD..WATONWAN..ROCK..NOBLES..JACKSON..MARTIN
SOUTHCENTRAL.......WESTERN NICOLLET
NAISTATSpecial weather statement, Aug 15, 10:51 PM CDT, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1045 PM CDT SAT AUG 15 1987 ...TORNADO WATCH IN EFFECT FOR A LARGE PORTION OF MINNESOTA UNTIL 2 AM CDT SUNDAY MORNING...NOT INCLUDING THE TWIN CITIES... AT 1030 PM...INTENSE THUNDERSTORMS WERE OCCURRING IN A 40 MILE WIDE LINE EXTENDING FROM JUST EAST OF HIBBING...SOUTH THRU CAMBRIDGE.. MONTICELLO.. BUFFALO AND NEW ULM..30 TO 50 MILES SOUTHWEST THRU NORTHWEST OF THE TWIN CITIES. FROM NEW ULM THE LINE EXTENDED SOUTHWEST TO THE IOWA BORDER NEAR WORTHINGTON. THE MOST INTENSE THUNDERSTORMS WERE LOCATED OVER CENTRAL MINNESOTA.. 50 MILES WEST OF THE TWIN CITIES.. MOVING INTO WESTERN SECTIONS OF SIBLEY AND MCLEOD COUNTIES.. A FEW MILES WEST OF OF HUTCHINSON SOUTHWEST TO FAIRFAX.. WINDS GUSTS OF 50 TO 55 MPH...HAIL...INTENSE RAINFALL... AND FREQUENT LIGTHNING. THE THUNDERSTORMS WILL BE REACHING THE WESTERN SECTIONS OF THE TWIN CITIES METRO AREA AROUND 1100 PM. MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR. CARLYON
Special weather statement, Aug 15, 11:39 PM CDT, 1 hour 46 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1137 PM CDT SAT AUG 16 1987 ...TORNADO WATCH IN EFFECT FOR A LARGE PORTION OF MINNESOTA UNTIL 2 AM CDT SUNDAY MORNING...NOT INCLUDING THE TWIN CITIES... AT 1126 PM...INTENSE THUNDERSTORMS WERE OCCURRING IN A 40 MILE WIDE LINE EXTENDING FROM GRANTSBURG WISCONSIN...SOUTH THRU TAYLORS FALLS.. AND THE TWIN CITIES.. SOUTHWEST TO MANKATO. FROM MANKATO THE LINE EXTENDED SOUTHWEST TO SOUTH CENTRAL MINNESOTA NEAR ST JAMES. THE MOST INTENSE THUNDERSTORMS WERE LOCATED OVER EAST CENTRAL MINNESOTA.. ACROSS ANOKA AND HENNEPIN COUNTIES OF THE TWIN CITIES METRO AREA.. MOVING EAST AT 35 MPH...WINDS GUSTS OF 50 TO 55 MPH...HAIL...INTENSE RAINFALL... AND FREQUENT LIGTHNING. THE THUNDERSTORMS WILL BE MOVING THRU THE REST OF THE TWIN CITIES METRO AREA BETWEEN 1135 PM TO 1235 AM THIS SATURDAY NIGHT/SUNDAY MORNING. THERE HAS NOT BEEN ANY SEVERE WEATHER REPORTED FROM THIS LINE OF STORMS SINE 900 PM CDT SATURDAY EVENING. CARLYON
Special weather statement, Aug 16, 12:43 AM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1240 AM CDT SUN AUG 16 1987 AT 1230 AM...THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE OCCURRING OVER WEST CENTRAL WISCONSIN AND SOUTHEAST THROUGH SOUTH CENTRAL MINNESOTA. THEY WERE MAINLY IN A 40 MILE WIDE AREA FROM BARRON IN WEST CENTRAL WISCONSIN...TO NORTHFIELD...TO ALBERT LEA IN SOUTH CENTRAL MINNESOTA. THESE THUNDERSTORMS PRODUCED VERY HEAVY RAINFALL AND STANDING WATER ON ROADS AS THEY MOVED THROUGH THE TWIN CITIES SINCE 1100 PM. THEY MAY ALSO BE EXPECTED TO PRODUCE STRONG GUSTY WINDS TO ABOUT 50 MILES AN HOUR AS WELL AS FREQUENT LIGHTNING AND POSSIBLE HAIL. MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR. RAIN...MOSTLY LIGHT...COVERED A LARGER SECTION OF THE SOUTHEAST HALF OF MINNESOTA AS WELL AS WESTERN WISCONSIN. KRAFT
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 7:48 PM CDT | Severe Thunderstorm Warning | MPX | Pope | 57 min |
| Aug 15, 8:00 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Swift | 60 min |
| Aug 15, 8:00 PM CDT | Severe Thunderstorm Warning | MPX | Todd | 60 min |
| Aug 15, 8:20 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Stearns | 60 min |
| Aug 15, 8:45 PM CDT | Severe Thunderstorm Warning | MPX | Morrison | 60 min |
| Aug 15, 8:45 PM CDT | Severe Thunderstorm Warning | MPX | Yellow Medicine | 60 min |
| Aug 15, 9:05 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Meeker, Morrison, Sherburne, Stearns | 60 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1987Every severe thunderstorm warning in 1987
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.