Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 3, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at May 21, 1987, 6:48 PM CDT for Rock County, Wisconsin. It was in force for 22 min.
The area
The counties it named.
The facts
- Issued
- May 21, 1987, 6:48 PM CDT (23:48 UTC)
- Expired
- May 21, 1987, 7:10 PM CDT
- In force
- 22 min
- Issued by
- NWS Green Bay, WI
- Area
- Whole counties
County Rock County, WI
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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.8 hours before the alert went out and 216 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 105 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 KMSN 212348 SVRMSN WIC105-220010- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MADISON WI 648 PM CDT THU MAY 21 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 710 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL WISCONSIN...EASTERN ROCK AT 642PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 30 MILES SOUTH..SOUTHEAST OF MADISON MOVING TOWARDS THE NORTH.V.NORTHEAST AT 40 MPH. THIS WARNING INCLUDES THE CITIES OF JANESVILLE AND EDGERTON. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS..LARGE HAIL AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES TAKE SHELTER. STIMACH
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, May 21, 3:19 PM CDT, 3 hours 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 315 PM CDT THU MAY 21 1987 ...STRONG THUNDERSTORMS CONTINUE OVER NORTHEAST WISCONSIN... AT 315PM CDT THE WEATHER SERVICE RADAR INDICATED STRONG THUNDERSTORMS OVER NORTHERN OCONTO COUNTY NORTHEAST OF MOUNTAIN EXTENDING NORTHEAST INTO CENTRAL AND NORTHERN MARINETTE COUNTY. ANOTHER STRONG THUNDERSTORM HAD DEVELOPED IN CENTRAL WAUPACA COUNTY NEAR MANAWA. THESE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 30 MPH. THESE THUNDERSTORMS SHOULD PRODUCE SOME HAIL BRIEF HEAVY RAINS AND DANGEROUS LIGHTNING. PERSONS IN NORTHEAST WISCONSIN SHOULD BE ALERT FOR THREATNING WEATHER CONDITIONS AND BE PREPARED TO TAKE COVER IF NECESSARY. PLH
Special weather statement, May 21, 3:55 PM CDT, 2 hours 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 350 PM CDT THU MAY 21 1987 ...STRONG THUNDERSTORMS CONTINUE OVER NORTHEAST WISCONSIN... AT 345 PM CDT RADAR SHOWS A STRONG THUNDERSTORM JUST SOUTHEAST OF THE CITY OF SHAWANO IN SHAWANO COUNTY...30 MILES NORTHWEST OF GREEN BAY. THIS STORM IS MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL AFFECT EASTERN SHAWANO AND SOUTHERN OCONTO COUNTY WITHIN THE NEXT HOUR. PERSONS IN THIS AREA SHOULD LISTEN TO LATER STATEMENTS. HELMAN
Special weather statement, May 21, 4:13 PM CDT, 2 hours 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 410 PM CDT THU MAY 21 1987 ...STRONG THUNDERSTORMS CONTINUE OVER NORTHEAST WISCONSIN... AT 400 PM CDT RADAR SHOWS SCATTERED THUNDERSTORMS THROUGHOUT NORTHEAST WISCONSIN. THE STRONG STORM IN WESTERN SHAWANO COUNTY HAS DECREASED IN INTENSITY. AT 345 PM CDT PEA SIZE HAIL WAS REPORTED BY A HAM OPERATOR IN THE CITY OF OSHKOSH...AT 400 PM CDT PEA SIZE HAIL WAS ALSO REPORTED BY A HAM OPERATOR IN THE CITY OF DEPERE...JUST SOUTH OF GREEN BAY. ALL THUNDERSTORMS IN NORTHEAST WISCONSIN ARE MOVING NORTHEAST AT 30 MPH. PERSONS IN NORTHEAST WISCONSIN SHOULD LISTEN TO LATER STATEMENTS. HELMAN
Special weather statement, May 21, 6:18 PM CDT, 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 615 PM CDT THU MAY 21 1987 ...STRONG THUNDERSTORM JUST SOUTH OF CLINTONVILLE... AT 610 PM CDT RADAR SHOWS A STRONG THUNDERSTORM IN EXTREME WESTERN WAUPACA AND NORTHEASTERN OUTAGAMIE COUNTIES...30 MILES WEST OF GREEN BAY. THIS STORM IS MOVING NORTHEAST AT 35 MPH AND WILL MOVE INTO EASTERN SHAWANO COUNTY BY 630 PM CDT. STRONG WINDS...HEAVY RAINS...HAIL AND DANGEROUS LIGHTNING CAN BE< EXPECTED WITH THIS STORM. PERSONS IN THE AREA SHOULD LISTEN TO LATER STATEMENTS. HELMAN
Special weather statement, May 21, 6:29 PM CDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 628 PM CDT THU MAY 21 1987 ...STRONG THUNDERSTORM MOVING TOWARDS GREEN BAY.. AT 625 PM CDT RADAR SHOWS A STRONG THUNDERSTORM MOVING TOWARD THE CITY OF GREEN BAY. THIS STORM HAS PRODUCED 1/4 INCH HAIL IN THE APPLETON AREA. THE STORM IS MOVING NORTHEAST AT 35 MPH AND WILL MOVE INTO THE GREEN BAY VICINTY AREA BY 640 PM CDT. STRONG WINDS...HEAVY RAINS...HAIL AND DANGEROUS LIGHTNING CACN BE EXPECTED WITH THIS STORM. PERSONS IN THE AREA SHOULD LISTEN TO LATER STATEMENTS. HELMAN
Special weather statement, May 21, 6:45 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 640 PM CDT THU MAY 21 1987 ...THUNDERSTORMS INTENSIFING OVER NORTHEAST WISCONSIN... AT 640PM CDT THE WEATHER SERVICE RADAR SHOWS STRONG TH
The office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 6:06 PM CDT | Severe Thunderstorm Warning | GRB | Dane | 24 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; the sounding from the Mesonet's radiosonde archive.