Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 83, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 1987, 9:27 PM CDT for Brown County, Nicollet County, Minnesota. It was in force for 48 min.
The area
The counties it named.
The facts
- Issued
- Jul 23, 1987, 9:27 PM CDT (02:27 UTC)
- Expired
- Jul 23, 1987, 10:15 PM CDT
- In force
- 48 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Brown County, MN, Nicollet 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, 2.5 hours before the alert went out and 93 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
- 1899 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 812 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KRST 240227
SVRRST
MNC015-103-240315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
927 PM CDT THU JUL 23 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH CENTRAL MINNESOTA
...BROWN...NICOLLET
AT 915 PM RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM REDWOOD
FALLS TO 40 MILES WEST OF REDWOOD FALLS MOVING TO THE EAST AT 30 MPH.
THIS WARNING INCLUDES THE TOWNS OF NEW ULM AND ST. PETER.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
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
Local storm report, Jul 23, 3:38 PM CDT, 5 hours 49 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD, MN
335 PM CDT THU JUL 23 1987
...ATTN SELS...
SEVERE WEATHER REPORT FROM 23 JUL 1987
1218 PM CDT 1/2 INCH HAIL AT FOLEY MINNESOTA...10 MILES NORTHEAST OF
ST. CLOUD.
1221 PM CDT 3/4 TO 1 INCH HAIL IN NOTHERN SECTIONS OF ST. CLOUD.
1230 PM CDT LARGE TREES DOWN...POWER POLES AND POWER LINES DOWN IN
SAUK RAPIDS MINNESOTA...A NORTHERN SUBURB OF ST. CLOUD.
FRASERSpecial weather statement, Jul 23, 5:13 PM CDT, 4 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST. CLOUD MN 505 PM CDT THU JUL 23 1987 ...TORNADO WATCH CENTRAL MINNESOTA UNTIL 900 PM CDT... RADAR SHOWED AN AREA OF STRONG THUNDERSTORMS DEVELOPING RAPIDLY IN SOUTHERN SHERBURNE COUNTY. THESE THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY RAINFALL AND SMALL HAIL. PEOPLE IN SOUTHERN SHERBURNE COUNTY AND ESPECIALLY NEAR THE CITIES OF BECKER... BIG LAKE AND ELK RIVER SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY IF SEVERE WEATHER DEVELOPES. FRASER
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:01 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 29 min |
| Jul 23, 7:21 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin, Ramsey, Washington | 54 min |
| Jul 23, 7:29 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 31 min |
| Jul 23, 7:57 PM CDT | Tornado Warning | MPX | Anoka, Dakota, Hennepin, Ramsey | 33 min |
| Jul 23, 8:33 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 57 min |
| Jul 23, 8:33 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Dakota, Hennepin, Scott | 57 min |
| Jul 23, 8:33 PM CDT | Severe Thunderstorm Warning | MPX | Ramsey | 57 min |
| Jul 23, 8:35 PM CDT | Severe Thunderstorm Warning | MPX | Yellow Medicine | 55 min |
| Jul 23, 8:57 PM CDT | Severe Thunderstorm Warning | MPX | Redwood | 53 min |
| Jul 23, 9:46 PM CDT | Flash Flood Warning | MPX | Anoka, Dakota, Hennepin, Ramsey, Washington | 3 hr |
| Jul 23, 9:46 PM CDT | Flash Flood Warning | MPX | Carver, Scott | 3 hr |
| Jul 23, 11:51 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Ramsey, Washington | 34 min |
| Jul 24, 12:03 AM CDT | Severe Thunderstorm Warning | MPX | Fillmore, Olmsted, Winona | 57 min |
| Jul 24, 12:12 AM CDT | Severe Thunderstorm Warning | MPX | Chisago | 33 min |
| Jul 24, 12:50 AM CDT | Flash Flood Warning | MPX | Carver, Hennepin, Scott | 2 hr |
| Jul 24, 12:50 AM CDT | Flash Flood Warning | MPX | Anoka, Dakota, Ramsey, Washington | 2 hr |
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.