Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 37, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 12, 1987, 12:15 PM CDT for Milwaukee County, Ozaukee County, Sheboygan County, Wisconsin. It was in force for 52 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 12, 1987, 12:15 PM CDT (17:15 UTC)
- Expired
- Jul 12, 1987, 1:07 PM CDT
- In force
- 52 min
- Issued by
- NWS Milwaukee, WI
- Area
- Whole counties
Counties Milwaukee County, WI, Ozaukee County, WI, Sheboygan County, WI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 12, 12:30 PM CDT | Thunderstorm Wind 0 | Milwaukee, WI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.3 hours before the alert went out and 122 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
- 386 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 622 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMKE 121715 SVRMKE WIC079-089-117-131-133-121815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MILWAUKEE WI 1215 PM CDT SUN JUL 12 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 115 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST WISCONSIN...MILWAUKEE...OZAUKEE...SHEBOYGAN...EASTERN WASHINGTON AND EASTERN WAUKESHA ...INCLUDING THE ADJACENT COASTAL WATERS OF ....LAKE MICHIGAN AT 1210 PM...RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS FROM PLYMOUTH IN SHEBOYGAN COUNTY 35 MILES SOUTHEAST OF OSHKOSH... SOUTH TO 30 MILES SOUTHWEST OF MILWAUKEE. AT 1205 PM...50 MPH WINDS WERE REPORTED IN NEW BERLIN IN WAUKESHA COUNTY. THE LINE OF STORMS WAS MOVING EAST AT 25 MPH. REMEMBER..SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNIiNG..SO BE ON THE LOOKOUT. STUREY
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 12, 11:52 AM CDT, 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE WI 1150AM CDT SUN JUL 12 1987 ...SEVERE THUNDERSTORM WATCH FOR EXTREME EASTERN WISCONSIN TILL 7 PM... A SEVERE THUNDERSTORM WATCH WAS ISSUED FOR THE EXTREME EASTERN PART OF WISCOSNIN AND THE ADJACENT COASTAL WATERS OF LAKE MICHIGAN. AT 1145 AM A LIME OF STRONG THUNDERSTORMS STRETCHED FROM 15 MILES EAST OF GREEN BAY TO 10 MILES WEST OF WEST BEND IN WASHINGTON COUNTY TO THE CITY OF WAUKESHA...THEN DOWN TO LAKE GENEVA IN WALWORTH COUNTY. THIS LINE WAS MOVING EAST AT 25 MPH AND SHOULD BE IN THE CITY OF MILWAUKEE BY 1230 PM. HEAVY RAINS...STRONG WINDS...AND POSSIBLE HAIL CAN BE EXPECTED WITH THESE STORMS. IF THREATENING WEATHER APPROCHES YOU SHOULD SEEK SHELTER IMMEDIATELY. KLD BRIEF HEAVY RAINS..DANGEROUS LIGHTNING..GUSTY WINDS TO 40 MILES AN HOUR AND SMALL HAIL WILL ACCOMPANY THIS LINE OF STORMS. PERSONS AND BOATERS IN THE PATH OF THIS LINE OF STORMS SHOULD BE PREOPARED FOR RAPIDLY CHANGING WEATHER CONDITIONS. MORRIS
Special weather statement, Jul 12, 11:54 AM CDT, 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE WI 1150 AM CDT SUN JUL 12 1987 ...SEVERE THUNDERSTORM WATCH FOR EXTREME EASTERN WISCONSIN TILL 7 PM... A SEVERE THUNDERSTORM WATCH WAS ISSUED FOR THE EXTREME EASTERN PART OF WISCONSIN AND THE ADJACENT COASTAL WATERS OF LAKE MICHIGAN. AT 1145 AM A LINE OF STRONG THUNDERSTORMS STRETCHED FROM 15 MILES EAST OF GREEN BAY TO 10 MILES WEST OF WEST BEND...IN WASHINGTON COUNTY TO THE CITY OF WAUKESHA...THEN DOWN TO LAKE GENEVA IN WALWORTH COUNTY. THIS LINE WAS MOVING EAST AT 25 MPH AND SHOULD BE IN THE CITY OF MILWAUKEE BY 1230 PM. HEAVY RAINS...STRONG WINDS...AND POSSIBLE HAIL CAN BE EXPECTED WITH THESE STORMS. IF THREATENING WEATTHER APPROCHES YOU SHOULD SEEK SHELTER IMMEDIATELY. KLD
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 8:56 PM CDT | Severe Thunderstorm Warning | MKX | Portage, Wood | 64 min |
| Jul 12, 12:15 PM CDT | Severe Thunderstorm Warning | MKX | Washington, Waukesha | 25 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.