Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 81, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 1987, 8:35 PM CDT for Yellow Medicine County, Minnesota. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jul 23, 1987, 8:35 PM CDT (01:35 UTC)
- Expired
- Jul 23, 1987, 9:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Yellow Medicine 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, 1.6 hours before the alert went out and 180 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 KSTC 240144 SVRSTC MNC173-240230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST CLOUD MN 835 PM CDT THU JUL 23 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL MINNESOTA...EAST HALF OF YELLOW MEDICINE INCLUDING THE CITIES OF WOOD LAKE...ECHO AND GRANITE FALLS. AT 830 PM RADAR SHOWED SEVERE THUNDERSTORMS DEVELOPING RAPIDLY IN LYON COUNTY OF WEST CENTRAL MINNESOTA MOVING EAST NORTHEAST AT 25 MPH. 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. FRASER
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, 4 hours 57 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, 3 hours 22 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, 8:57 PM CDT | Severe Thunderstorm Warning | MPX | Redwood | 53 min |
| Jul 23, 9:27 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Nicollet | 48 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.