Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 25, NWS Milwaukee, WI

May 17, 1999Walworth County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at May 17, 1999, 1:24 AM CDT for Walworth County, Wisconsin. It was in force for 61 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: May 17, 1999, 1:24 AM CDT (06:24 UTC)
Expired: May 17, 1999, 2:25 AM CDT
In force: 61 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

County Walworth County, WI

What was reported inside it

Time	Report	Where	Remark
May 17, 1:40 AM CDT	Thunderstorm Wind	Walworth, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 16, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.4 hours before the alert went out and 199 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3009 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1174 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.9

Open this sounding in Storm Lab

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

Local storm report, May 16, 8:02 PM CDT, 5 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
802 PM CDT SUN MAY 16 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0625 PM    WEST BEND                 WI    60 MPH TSTM GUST
05/16/99   WASHINGTON

0635 PM    WATERFORD                 WI    64 MPH TSTM GUST
05/16/99   RACINE

0735 PM    KENOSHA                   WI    1.75 INCH HAIL
05/16/99   KENOSHA

GD

Local storm report, May 16, 8:02 PM CDT, 5 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
802 PM CDT SUN MAY 16 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0625 PM    WEST BEND                 WI    60 MPH TSTM GUST
05/16/99   WASHINGTON

0635 PM    WATERFORD                 WI    64 MPH TSTM GUST
05/16/99   RACINE

0735 PM    KENOSHA                   WI    1.75 INCH HAIL
05/16/99   KENOSHA

GD

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 7:37 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha	63 min
May 16, 9:15 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	60 min
May 16, 9:20 PM CDT	Severe Thunderstorm Warning	MKX	Iowa	60 min
May 16, 10:10 PM CDT	Flash Flood Warning	MKX	Iowa, Lafayette	3 hr
May 16, 10:10 PM CDT	Flash Flood Warning	MKX	Sauk	3 hr
May 16, 10:17 PM CDT	Severe Thunderstorm Warning	MKX	Green, Lafayette	58 min
May 16, 10:43 PM CDT	Flash Flood Warning	MKX	Columbia, Marquette	3 hr
May 16, 11:06 PM CDT	Severe Thunderstorm Warning	MKX	Dane	59 min
May 16, 11:23 PM CDT	Flash Flood Warning	MKX	Green	3 hr
May 17, 12:30 AM CDT	Severe Thunderstorm Warning	MKX	Rock	60 min
May 17, 1:30 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine	60 min
May 17, 4:10 AM CDT	Flash Flood Warning	MKX	Green, Lafayette	14 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1999 Every severe thunderstorm warning in 1999

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.