Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 37, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 9, 1991, 6:00 PM CDT for Milwaukee County, Wisconsin. It was in force for 30 min. 2 reports 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
- Sep 9, 1991, 6:00 PM CDT (23:00 UTC)
- Expired
- Sep 9, 1991, 6:30 PM CDT
- In force
- 30 min
- Issued by
- NWS Milwaukee, WI
- Area
- Whole counties
County Milwaukee County, WI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 9, 6:02 PM CDT | Hail 1 | Milwaukee, WI | |
| Sep 9, 6:29 PM CDT | Hail 2 | 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, 11.0 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
- 649 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 219 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
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, Sep 9, 5:15 PM CDT, 45 minutes before
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</html>Special weather statement, Sep 9, 5:59 PM CDT, 1 minute before
WIZ017-020-092310- SPECIAL WEATHER AND MARINE STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 558 PM CDT MON SEP 9 1991 AT 549 PM CDT HAM RADIO OBSERVERS REPORT 3/4 INCH HAIL IN WHITEFISH BAY...5 MILES NORTH OF MILWAUKEE AND 1/2 INCH HAIL AT WEST ALLIS...5 MILES WEST SOUTHWEST OF MILWAUKEE. IN ADDITION HAIL OF 1/2 TO 3/4 INCH DIAMETER WAS REPORTED IN MILWAUKEE AT 60TH AND OKLAHOMA...AS WELL AS SEVERAL OTHER LOCATIONS. THE INTENSE THUNDERSTORM PRODUCING THE HAIL IS MOVING INTO THE EASTERN PORTIONS OF MILWAUKEE COUNTY AND WILL BE MOVING INTO LAKE MICHIGAN BUR THE NEXT HALF HOUR. PERSONS IN THE EASTERN PORTIONS OF MILWAUKEE COUNTY SHOULD BE ALERT FOR THS STORM. BOATERS IN LAKE MICHIGAN SHOULD ALREADY BE IN SAFE HARBOR. ZAJDEL
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 6:31 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee | 19 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 1991Every severe thunderstorm warning in 1991
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.