Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 99, NWS Twin Cities, MN

July 27, 1987Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 27, 1987, 5:14 PM CDT for Rice County, Minnesota. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1987, 5:14 PM CDT (22:14 UTC)
Expired
Jul 27, 1987, 6:00 PM CDT
In force
46 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Rice 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, 10.2 hours before the alert went out and 60 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 1987-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1473 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 1987-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 square meters per square second.193958Sfc1 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
1473 J/kg
Mixed-layer CIN
-176 J/kg
Mixed-layer LCL
645 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.8

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 27, 12:09 PM CDT, 5 hours 5 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1205 PM CDT MON JUL 27 1987

..HEAVY RAINS BEGIN TO LET UP ACROSS PARTS OF WEST CENTRAL WISCONSIN..

THUNDERSTORMS PRODUCING HEAVY RAINS WERE BEGINNING TO BECOME LESS
NUMEROUS IN AREAS SOUTH AND SOUTHWEST OF EAU CLAIRE ACROSS PEPIN AND
BUFFALO COUNTIES BUT FURTHER SOUTHEAST VERY HEAVY RAINS REMAIN OVER
MUCH OF TREMPEALEAU COUNTY.

AT 1145 AM CDT..RADAR WAS SHOWING THE STRONGEST THUNDERSTORMS CONCENTRATED
IN THE GALESVILLE..BLAIR AND WHITEHALL AREAS OF TREMPEALEAU COUNTY..SOUTH
THROUGH LA CROSSE. OTHER SHOWERS AND A FEW THUNDERSHOWERS WERE WIDELY
SCATTERED TO THE WEST AND NORTHWEST OF EAU CLAIRE.

PERSONS IN PEPIN..BUFFALO AND TREMPEALEAU COUNTIES..AS WELL AS AREAS
FURTHER SOUTHEAST TOWARD LA CROSSE SHOULD WATCH FOR MINOR FLOODING
ALONG LOW SPOTS..SMALL STREAMS AND OTHER AREAS WHERE HIGH WATER COULD
CAUSE PROBLEMS.

MOVEMENT ON THE SHOWERS AND THUNDERSTORMS ACROSS WESTERN WISCONSIN
CONTINUED SOUTHEAST AT 25 MILES AN HOUR.
SWANBERG
Special weather statement, Jul 27, 12:57 PM CDT, 4 hours 17 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1250 PM CDT MON JUL 27 1987

..VERY STRONG THUNDERSTORM FORMS OVER NORTHWEST WISCONSIN..

AT 1235 PM CDT..RADAR WAS SHOWING A VERY STRONG THUNDERSTORM THAT HAD
DEVELOPED OVER CENTRAL BURNETT COUNTY OF NORTHWEST WISCONSIN NEAR THE
TOWNS OF SIREN AND WEBSTER.

THIS THUNDERSTORM HAS THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS..VERY
HEAVY RAINS..SMALL HAIL AND FREQUENT LIGHTNING STRIKES AS IT MOVES TO
THE SOUTHEAST AT 25 MILES AN HOUR. IF THIS STRONG THUNDERSTORM HOLDS
TOGETHER IT WILL BE MOVING THROUGH PARTS OF NORTHEAST POLK AS WELL AS
BARRON COUNTIES OF NORTHWEST WISCONSIN THROUGH 1 PM.

FURTHER SOUTH..SHOWERS AND THUNDERSTORMS REMAINED OVER WESTERN WISCONSIN
MAINLY BETWEEN EAU CLAIRE AND LA CROSSE WITH VERY HEAVY RAINS STILL
ASSOCIATED WITH THIS ACTIVITY. MINOR FLOODING REMAINS A THREAT IN THIS
AREA.

MOVEMENT WAS SOUTHEAST AT 25 M	ILES AN HOUR.
SWANBERG
Special weather statement, Jul 27, 2:01 PM CDT, 3 hours 13 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
155 PM CDT MON JUL 27 1987

..VERY STRONG THUNDERSTORMS RUMBLE ACROSS NORTHWEST WISCONSIN..

AT 145 PM CDT..RADAR WAS SHOWING A BAND OF INTENSE THUNDERSTORMS LOCATED
ACROSS BARRON..NORTHEAST DUNN AND CHIPPEWA COUNTIES OF NORTHWEST WISCONSIN.

THESE INTENSE THUNDERSTORMS WERE OCCURRING IN THE TURTLE LAKE..RIDGELAND
SAND CREEK AND BLOOMER AREAS TO THE NORTHEAST OF CHIPPEWA FALLS AND
EAU CLAIRE. MOVEMENT TO THE SOUTHEAST AT 30 MILES AN HOUR WILL TAKE THESE
STRONG THUNDERSTORMS THROUGH AREAS NEAR EAU CLAIRE AND CHIPPEWA FALLS
THROUGH 3 PM THIS AFTERNOON.

STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES..VERY HEAVY RAINS ALONG
WITH SMALL HAIL ARE LIKELY AS THESE STORMS MOVE THROUGH SOUTHERN
CHIPPEWA..EASTERN DUNN AND EAU CLAIRE COUNTIES.

ELSEWHERE..SHOWERS AND THUNDERSTORMS WERE LOCATED NEAR AND NORTH OF
LA CROSSE.

THIS PRECIPITATION WWAS ALSO MOVING SOUTHEAST AT 25 TO 30 MILES AN HOUR.
SWANBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 3:34 PM CDTTornado WarningMPXGoodhue26 min
Jul 27, 3:40 PM CDTTornado WarningMPXDakota20 min
Jul 27, 3:59 PM CDTTornado WarningMPXDakota31 min
Jul 27, 4:02 PM CDTTornado WarningMPXGoodhue28 min
Jul 27, 4:32 PM CDTTornado WarningMPXGoodhue, Rice43 min
Jul 27, 4:54 PM CDTSevere Thunderstorm WarningMPXDakota36 min
Jul 27, 5:53 PM CDTSevere Thunderstorm WarningMPXScott47 min
Jul 27, 6:52 PM CDTSevere Thunderstorm WarningMPXSteele, Waseca53 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.