Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 99, NWS Twin Cities, MN
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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 3:34 PM CDT | Tornado Warning | MPX | Goodhue | 26 min |
| Jul 27, 3:40 PM CDT | Tornado Warning | MPX | Dakota | 20 min |
| Jul 27, 3:59 PM CDT | Tornado Warning | MPX | Dakota | 31 min |
| Jul 27, 4:02 PM CDT | Tornado Warning | MPX | Goodhue | 28 min |
| Jul 27, 4:32 PM CDT | Tornado Warning | MPX | Goodhue, Rice | 43 min |
| Jul 27, 4:54 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 36 min |
| Jul 27, 5:53 PM CDT | Severe Thunderstorm Warning | MPX | Scott | 47 min |
| Jul 27, 6:52 PM CDT | Severe Thunderstorm Warning | MPX | Steele, Waseca | 53 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.