Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 68, NWS Twin Cities, MN

July 23, 1987Mille Lacs County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 23, 1987, 12:15 PM CDT for Mille Lacs County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 23, 1987, 12:15 PM CDT (17:15 UTC)
Expired
Jul 23, 1987, 1:15 PM CDT
In force
60 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Mille Lacs 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, 5.3 hours before the alert went out and 121 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1987-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 575 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1987-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
575 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1013 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-25 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Jul 23, 6:15 AM CDT, 6 hours before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
615 AM CDT THU JUL 23 1987

...PART OF NORTHERN MINNESOTA IS BEING CLEARED FROM SEVERE THUNDERSTORM
   WATCH NUMBER 420...

SEVERE THUNDERSTORMS HAVE MOVED RAPIDLY ACROSS PORTIONS OF NORTHERN
MINNESOTA THIS MORNING. DUE TO THIS RAPID MOVEMENT MUCH OF THE WESTERN
HALF OF SEVERE THUNDESTORM WATCH NUMBER 420 HAS BEEN CLEARED. THE
COUNTIES WHICH HAVE BEEN CLEARED ARE...MARSHALL..LAKE OF THE WOODS..
POLK..PENNINGTON..RED LAKE..NORMAN..MAHNOMEN..CLEARWATER..BELTRAMI..
CLAY..BECKER..HUBBARD.WILKIN..OTTERTAIL..WADENA..TRAVERSE..GRANT AND
NORTHERN DOUGLAS.

THUNDERSTORMS CONTINUE OVER NORTH CENTRAL AND NORTHEAST MINNESOTA.
THESE THUNDERSTORMS STILL HAVE THE POTIENTAL FOR PRODUCING SEVERE
WEATHER UNTIL 9 AM THIS MORNING AND SEVERE THUNDERSTORM WATCH 420
WILL REMAIN IN EFFECT FOR HE EASTERN COUNTIES OF THE WATCH AREA.
MOVEMENT OF THESE THUNDERSTORMS WAS EAST AT R40 TO 45 MILES AN HOUR.
DOMBROWSKY
Special weather statement, Jul 23, 7:07 AM CDT, 5 hours 8 minutes before
SPECIAL WEATHER STATEMANT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
0705 AM CDT THU JUL 23  1987

THE NATIONAL SEVERE STORMS FORECAST CENTER HAS CANCELLED
SEVERE THUNDERSTORM WATCH NUMBER 420 ISS}UED AT 211 AM CDT
FOR CENTRAL AND NORTHERN MINNESOTA. THUNDERSTORMS WILL
CONTINUE TO DIMINISH DURING THE NEXT SEVERAL HOURS BUT ARE
NOT EXPECTED TO REACH SEVERE LIMITS.

DOMBROWSKY
Special weather statement, Jul 23, 11:42 AM CDT, 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MN
1142 AM CDT THU JUL 23 1987

...STRONG THUNDERSTORM MOVING ACROSS CENTRAL STEARNS COUNTY...

AT 1140 RADAR SHOWED A STRONG THUNDERSTORM NEAR ALBANY IN CENTRAL
STEARNS COUNTY OF CENTRAL MINNESOTA. ALBANY IS 18 MILES NORTHWEST OF
ST CLOUD.

THESE THUNDERSTORMS HAVE PRODUCED PEA SIZE HAIL AND SOME HAIL UP TO
1/2 INCH.

THE THUNDERSTORMS CONTINUE TO MOVE EAST AT 30 MILES AN HOUR.

NO SEVERE WEATHER HAS BEEN REPORTED...HOWEVER PERSONS IN THE PATH OF
THESE THUNDERSTORMS CAN EXPECT SMALL HAIL...GUSTY WINDS...AND BRIEF
HEAVY RAIN.

THESE STORMS WILL MOVE THROUGH THE ST CLOUD AREA BETWEEN 12 NOON CDT
AND 1 PM CDT

YOUNG
Special weather statement, Jul 23, 12:00 PM CDT, 15 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1155 AM CDT THU JUL 23 1987

    ..STRONG THUNDERSTORM OVER CENTRAL MINNESOTA..

AT 1140 AM CDT..AN ISOLATED INTENSE THUNDERSTORM WAS OCCURRING OVER
CENTRAL MINNESOTA TO THE WEST OF ST CLOUD NEAR THE TOWN OF ALBANY IN
NORTHERN STEARNS COUNTY.

THIS THUNDERSTORM IS CAPABLE OF PRODUCING HAIL..STRONG GUSTY WINDS ALONG
WITH FREQUENT LIGHTNING STRIKES AND BRIEF HEAVY RAINS AS IT MOVES EAST
AT ABOUT 35 MILES AN HOUR TOWARD THE ST CLOUD AREA.

THIS STRONG THUNDERSTORM WAS PART OF AN AREA OF SHOWERS AND THUNDERSTORMS
REMAINING ACROSS PARTS OF CENTRAL AND EAST CENTRAL MINNESOTA AS WELL AS
NORTHWEST SECTIONS OF WISCONSIN FROM NEAR ALEXANDRIA..TO ST CLOUD AND
MONTICELLO..EAST TOWARD HAYWARD WISCONSIN.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.
SWANBERG

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 12:15 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Stearns60 min
Jul 23, 1:11 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti49 min
Jul 23, 2:08 PM CDTSevere Thunderstorm WarningMPXWashington52 min
Jul 23, 5:15 PM CDTSevere Thunderstorm WarningMPXSherburne60 min
Jul 23, 5:33 PM CDTSevere Thunderstorm WarningMPXWright42 min
Jul 23, 6:16 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Wright59 min
Jul 23, 6:40 PM CDTTornado WarningMPXAnoka, Hennepin65 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.