Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 27, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 5, 1987, 6:51 PM CDT for Olmsted County, Minnesota. It was in force for 24 min.
The area
The counties it named.
The facts
- Issued
- Jul 5, 1987, 6:51 PM CDT (23:51 UTC)
- Expired
- Jul 5, 1987, 7:15 PM CDT
- In force
- 24 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Olmsted 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, 11.9 hours before the alert went out and 134 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
- 77 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 771 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSP 052351 SVRRST MNC109-060015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCHESTER MN ISSUED BY MINNEAPOLIS MN 651 PM CDT SUN JUL 5 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST MINNESOTA... OLMSTED AT 630 PM CDT A THUNDERSTORM WENT THROUGH ROCHESTER IN CENTRAL OLMSTED COUNTY WITH WINDS OF 64 MILES PER HOUR AT THE ROCHESTER AIRPORT. THIS THUNDERSTORMS WAS MOVING EAST AND WILL PASS NEAR THE TOWNS OF CHESTER AND EYOTA. REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE HAIL AND FREQUENT LIGHTNING STRIKES. ALSEO SEVERE THUNDERSTORMS CAN DO 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. WJH
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 5, 1:50 PM CDT, 5 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 145 PM CDT SUN JUL 5 1987 ...THUNDERSTORMS IN THE TWIN CITIES METROPOLITAN AREA.... THUNDERSTORMS HAVE DEVELOPED RAPIDLY SINCE 100 PM THIS AFTERNOON IN THE TWIN CITIES METROPOLITAN AREA. THE THUNDERSTORMS DEVELOPED INITIALLY WEST OF THE TWIN CITIES AND MOVED ACROSS THE LAKE MINNETONKA AREA INTO CENTRAL HENNEPIN COUNTY. OTHER THUNDERSTORMS WERE LOCATED AROUND SHAKOPEE IN SCOTT COUNTY AND NEAR LAKEVILLE IN DAKOTA COUNTY. THUNDERSTORMS ARE POSSIBLE DURING THE REST OF THE AFTERNOON OVER THE TWIN CITIES AREA BECAUSE OF A WARM FRONT LOCATED ACROSS THE AREA. THESE THUNDERSTORMS ARE MOVING SLOWLY AND ARE LIKELY TO" PRODUCE VERY HEAVY RAINS AS WELL AND DANGEROUS LIGHTNING AND PERIODS OF GUSTY WINDS. WJH
Special weather statement, Jul 5, 2:17 PM CDT, 4 hours 34 minutes before
SPECIAL WEATHER STATMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 1 58 AM CDT SUN JUL 5 1987 RAPIDLY DEVELOPING THUNDERSTORMS WEST OF THE TWIN CITIES JUST WEST OF LAKE MINNETONKA NEAR WACONIA...HUTCHINSON AND ST BONIFACIOUS. AT 1 30 AM CDT...AN AREA OF THUNDERSTORMS DEVELOPED RAPIDLY JUST WEST OF THE TWIN CITIES IN THE VICINITY OF LAKE MINNETONKA AND WEST. THESE ARE EXPECTED TO MOVE EAST NORTHEAST INTO WESTERN HENNEPIN COUNTY BY 1 45 PM. THESE THUNDERSTORM MAY PRODUCE HEAVY RAIN...GUSTY WINDS... SMALL HAIL AND FREQUENTLY LIGHTNING. PARK RANGERS AT LAKE INDEPENDENCE REPORTED HEAVY RAIN...GUSTY WINDS AND SMALL HAIL AT 1 50 PM. LIGHT TO MODERATE SHOWERS WERE SCA?TTERED ACROSS MINNESOTA NORTH OF THE TWIN CITIES BETWEEN THE MISSISSIPPI RIVER AND THE ST CROIX RIVER AND NORTH TO AITKN. IN WISCONISN FROM HAYWARD SOUTH TO 25 MILES EAST OF EAU CLAIRE. MOVEMENT WAS NORTHEAST 20 TO 25 MILES AN HOUR. DME
Special weather statement, Jul 5, 2:42 PM CDT, 4 hours 9 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 240 PM CDT SUN JUL 5 1987 THUNDERSTORMS IN THE TWIN CITIES METROPOLITIAN AREA AS OF 230 PM EXTENDED ACROSS NORTH HENNEPIN COUNTY INTO SOUTHERN ANOKA COUNTY AND IN A SECTION OF RANSEY COUNTY JUST NORTH OF DOWNTOWN ST PAUL. MAPLE GROVE..BROOKLYN PARK..COON RAPIDS AND BLAINE ARE SOME OF THE CITIES NEAR THE STRONGEST THUNDERSTORMS. ANOTHER AREA OF THUNDERTORMS AS OF 230 PM EXTENDED FROM PRIOR LAKE IN SCOTT COUNTY SOUTH INTO LE SUEUR COUNTY. VERY HEAVY RAINFALL AND DANGEROUS LIGHTNING CAN BE EXPECTED WITGH THESE THUNDERSTORMS THROUGH THE AFTERNOON IN THE TWIN CITIES. SMALL HAIL IS ALSO POSSIBLE AND PEA SIZE HAIL WKAS REPORTED EARLIER IN RICHFIELD. THE THUNDERSTORMS WERE MOVING NORTHEAST AND WILL APPROACH THE ST CROIX RIVER VALLEY AFTER 300 PM. THOSE OUTDOORS AND ON AREA LAKES SHOULD BE PREPARED TO MOVE TO SHELTER IF THE SKY TURNS DARK. WJH
Special weather statement, Jul 5, 3:40 PM CDT, 3 hours 11 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 330 PM CDT SUN JUL 5 1987 AT 330 PM THUNDERSTORMS WERE LOCATED IN A LINE THROUGH THE HEART OF THE TWIN CITIES. THE THUNDERSTORMS EXTENDED FROM NEAR SHAKOPEE THROUGH THE TWIN CITIES INTERNATIONAL AIRPORT AND DOWNTOWN MINNEAPOLIS. THESE THUNDERSTORMS WERE MOVING IN ON THE TASTE OF MINNESOTA IN ST PAUL AND EXTENDED NORTH TO FOREST LAKE IN NORTHERN WASHINGTON COUNTY. DOWNTOWN MINNEAPOLIS HAS BEEN DRENCHED WITH OVER AN INCH OF RAIN. 0.80 OF AN INCH WAS REPORTED BY WEATHER SERVICE PERSONNEL IN RICHFIELD AND THE INTERNATIONAL AIRPORT RECEIVED AN UNOFFICAL 0.43 INCHES OF RAIN ALONG WITH GUSTS OF 35 MILES PER HOUR. FOR THE TIME BEING IT APPEARS THAT THERE ARE NO MORE THUNDERSTORMS THREATENING TO MOVE BACK INTO THE TWIN CITIES FROM THE WEST. A WARM FRONT DOES EXTEND OVER THE TWIN CITIES HOWEVER AND THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL REMAIN IN THE FORECAST THROUGH THIS EVENING. WJH
Special weather statement, Jul 5, 4:39 PM CDT, 2 hours 12 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 435 PM CDT SUN JUL 5 1987 ..STONG THUNDERSTORMS ENTERING EXTREME WEST CENTRAL WISCONSIN... AT 430 PM...VERY STRONG THUNDERSTORMS WERE ENTERING WESTERN ST CROIX COUNTY OF WEST CENTRAL WISCONSIN. AT 430 PM THE THUNDERSTORMS EXTENDED FROM NEAR NEW RICHMOND TO HUDSON OR ABOUT 25 MILE EAST OF DOWNTOWN ST PAUL MINNESOTA. THESE THUNDERSTORMS ARE CAPALBLE OF PRODUCING VERY HEAVY RAIN..HAIL AND GUSTY WINDS UP TO 50 MPH. THESE THUNDERSTORMS WILL HAVE MOVED THROUGH ST CORIX COUNTY BY 530 PM AND SHOULD ENTER WESTERN DUNN COUNTY BY 530 PM. SOME CITIES IN THE PATH OF THESE THUNDERSTORMS ARE HAMMOND..WOODVILLE AND KNAPP. THE STORMS WERE MOVING EAST AT 30 MPH. IF THREATENING WEATHER APPROACHES..MOVE TO A PLACE OF SAFETY. RICHARDSON
Special weather statement, Jul 5, 4:40 PM CDT, 2 hours 11 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 435 PM CDT SUN JUL 5 1987 ..STRONG THUNDERSTORMS ENTERING EXTREME WEST CENTRAL WISCONSIN... AT 430 PM...VERY STRONG THUNDERSTORMS WERE ENTERING WESTERN ST CROIX COUNTY OF WEST CENTRAL WISCONSIN. AT 430 PM THE THUNDERSTORMS EXTENDED FROM NEAR NEW RICHMOND TO HUDSON OR ABOUT 25 MILE EAST OF DOWNTOWN ST PAUL MINNESOTA. THESE THUNDERSTORMS ARE CAPALBLE OF PRODUCING VERY HEAVY RAIN..HAIL AND GUSTY WINDS UP TO 50 MPH. THESE THUNDERSTORMS WILL HAVE MOVED THROUGH ST CORIX COUNTY BY 530 PM AND SHOULD ENTER WESTERN DUNN COUNTY BY 530 PM. SOME CITIES IN THE PATH OF THESE THUNDERSTORMS ARE HAMMOND..WOODVILLE AND KNAPP. THE STORMS WERE MOVING EAST AT 30 MPH. IF THREATENING WEATHER APPROACHES..MOVE TO A PLACE OF SAFETY. RICHARDSON
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 6:08 PM CDT | Tornado Warning | MPX | Wright | 37 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.