Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 30, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 6, 1987, 4:59 PM CDT for Waukesha County, Wisconsin. It was in force for 41 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 6, 1987, 4:59 PM CDT (21:59 UTC)
- Expired
- Jul 6, 1987, 5:40 PM CDT
- In force
- 41 min
- Issued by
- NWS Milwaukee, WI
- Area
- Whole counties
County Waukesha 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 6, 5:05 PM CDT | Tornado F1 | Waukesha, 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, 10.0 hours before the alert went out and 163 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
- 668 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 6, 3:05 PM CDT, 1 hour 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE WI 303 PM CDT MON JUL 6 1987 ...STRONG THUNDERSTORMS MOVING INTO DODGE AND JEFFERSON COUNTIES... AT 300 PM CDT...WEATHER RADAR SHOWED AN AREA OF STRONG THUNDERSTORMS IN EASTERN COLUMBIA AND NORTHEAST DANE COUNTY IN SOUTHERN WISCONSIN. THE STORMS WERE MOVING TO THE EASTNORTHEAST AT 30 MPH AND WILL BE MOVING INTO PORTIONS OF WESTERN DODGE AND NORTHWESTERN JEFFERSON COUNTIES BETWEEN 3 AND 330 PM. THESE STRONG THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN...GUSTY WINDS AND POSSIBLE SMALL HAIL. PERSONS IN DODGE AND JEFFERSON COUNTIES SHOULD BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS THESE STORMS APPROACH. FIELD
Special weather statement, Jul 6, 3:06 PM CDT, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MADISON WI 305 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM CDT FOR PORTIONS OF WESTERN AND SOUTHERN WISCONSIN... AT 300 PM CDT WEATHER RADAR INDICATED A 75 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS EXTENDING FROM 35 MILES SOUTHWEST OF ROCKFORD ILLINOIS TO MADISON AND TO 35 MILES NORTHEAST OF LACROSSE. THE ENTIRE AREA WAS MOVING TO THE EAST AT ABOUT 20 MPH. THE HEAVIEST RAINFALL AREAS WERE LOCATED OVER ELROY OR 45 MILES EAST OF LACROSSE...JUST NORTHEAST OF LODI OR ABOUT 20 MILES NORTH OF MADISON... ANOTHER LOCATED 5 MILES NORTHWEST OF MT. HOREB OR ABOUT 20 MILES WEST MADISON AND A VERY HEAVY RAINFALL AREA LOCATED 15 MILES WEST OF ROCKFORD ILLINOIS. VERY HEAVY RAIN HAS BEEN REPORTED...NOT MUCH WIND AND NO REPORTS OF ANY SEVERE WEATHER AS OF 300 PM CDT. ADDISON
Special weather statement, Jul 6, 3:35 PM CDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MADISON WI 335 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM CDT FOR PORTIONS OF WESTERN AND SOUTHERN WISCONSIN... AT 330 PM CDT WEATHER RADAR INDICATED A 75 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS EXTENDING FROM 25 MILES SOUTHWEST OF ROCKFORD ILLINOIS TO 20 MILES EAST OF MADISON AND TO 45 MILES NORTHEAST OF LACROSSE. THE ENTIRE AREA WAS MOVING TO THE EAST AT ABOUT 30 MPH. THE HEAVIEST RAINFALL AREAS WERE LOCATED 5 MILES EAST OF ELROY OR 45 MILES EAST OF LACROSSE...A SECOND JUST SOUTH OF RIO OR ABOUT 20 MILES NORTH NORTHEAST OF MADISON...AND A HEAVY RAINFALL AREA LOCATED OVER ROCKFORD ILLINOIS. AT 320 PM CDT THE JUNEAU COUNTY SHERIFF REPORTED WINDS OF 40 TO 45 MPH AT ELROY ALONG WITH VERY HEAVY RAINS. NO DAMAGE WAS REPORTED. NO OTHER REPORTS OF SEVERE WSATHER HAVE BEEN RECEIVED AS OF 330 PM CDT. ADDISON
Local storm report, Jul 6, 3:41 PM CDT, 1 hour 18 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MADISON WI
344 PM CDT MON JUL 6 1987
337 PM CDT THE COLUMBIA COUNTY SHERIFF REPORTED 40 TO 50 MPH WINDS..
PEA TO MARBEL SIZE HAIL AND VERY HEAVY RAIN WITH
VISIBILITY NEAR ZERO IN THE RAIN.
ADDISONSpecial weather statement, Jul 6, 4:05 PM CDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MADISON WI 405 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM CDT FOR PORTIONS OF WESTERN AND SOUTHERN WISCONSIN... AT 400 PM CDT WEATHER RADAR INDICATED A 75 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS EXTENDING FROM 20 MILES EAST OF ROCKFORD ILLINOIS TO 25 MILES EAST OF MADISON AND TO 45 MILES NORTHEAST OF LACROSSE. THE ENTIRE AREA WAS MOVING TO THE EAST AT ABOUT 30 MPH. OTHER AREAS OF WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE NOTED OVER SOUTHEASTERN MINNESOTA AND NORTHEAST IOWA. VERY HEAVY RAINFALL WAS LOCATED FROM RANDOLPH TO JEFFERSON. THIS SHORT LINE OF THUNDERSTORMS WAS REPORTED TO CONTAIN 40 TO 50 MPH WINDS..PEA TO MARBEL SIZE HAIL ALONG WITH HEAVY RAIN THAT REDUCED THE VISIBILITY TO A FEW FEET IN COLUMBUS AT 337 PM CDT. OTHER AREAS OF HEAVY RAINFALL WERE NOTED 5 MILES SOUTH OF MAUSTON OR ABOUT 75 MILES NORTHWEST OF MADISON AND ANOTHER 15 MILES EAST OF ROCKFORD ILLINOIS. ADDISON
Special weather statement, Jul 6, 4:35 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MADISON WI 435 PM CDT MON JUL 6 1987 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7 PM CDT FOR PORTIONS OF WESTERN AND SOUTHERN WISCONSIN... AT 430 PM CDT WEATHER RADAR INDICATED AREAS OF SHOWERS AND THUNDERSTORMS EXTENDING OVER MUCH OF CENTRAL AND SOUTHEAST WISCONSIN. THESE AREAS OF PRECIPITATION WERE MOVING TO THE EAST AT 25 MPH. VERY HEAVY RAINFALL WAS LOCATED 5 MILES NORTHEAST AND A SECOND ONE 10 MILES TO THE EAST SOUTHEAST OF WATERTOWN..OR ABOUT 40 TO 45 MILES EAST OF MADISON. ONE OTHER THUNDERSTORM OR NOTE WAS LOCATED 25 MILES EAST OF BLACK RIVER FALLS OR ABOUT 45 MILES SOUTHWEST OF WAUSAU. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED AS OF 430 PM CDT. ADDISON
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 3:39 PM CDT | Severe Thunderstorm Warning | MKX | Dodge | 51 min |
| Jul 6, 5:23 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 37 min |
| Jul 6, 5:44 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Waukesha | 51 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.