Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 41, NWS Milwaukee, WI

July 15, 2003Walworth County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 15, 2003, 2:15 AM CDT for Walworth County, Wisconsin. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 15, 2003, 2:15 AM CDT (07:15 UTC)
Expired: Jul 15, 2003, 3:15 AM CDT
In force: 60 min
Issued by: NWS Milwaukee, WI
Area: Counties, with a storm outline in the text

County Walworth County, WI

The radar

The Milwaukee radar (KMKX), 26 km from the middle of the area, began a volume at 07:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.3 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2033 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KMKX 150719
SVRMKX
WIC127-150815-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
215 AM CDT TUE JUL 15 2003

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WALWORTH COUNTY IN SOUTHEAST WISCONSIN

* UNTIL 315 AM CDT

* AT 215 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 18 MILES NORTHWEST OF ELKHORN...OR ABOUT NEAR
  WHITEWATER...MOVING SOUTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELKHORN AT 235 AM CDT.
  COMO AT 240 AM CDT.
  LAKE GENEVA AT 245 AM CDT.

IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD PREPARE FOR
DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. SEEK SHELTER IMMEDIATELY

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH
THESE STORMS. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS
PASSED.

LAT...LON 4285 8854 4283 8874 4273 8875 4252 8843
          4264 8829

$$

DAVIS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 1:59 AM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	46 min
Jul 15, 2:04 AM CDT	Severe Thunderstorm Warning	MKX	Rock	41 min
Jul 15, 2:19 AM CDT	Severe Thunderstorm Warning	MKX	Walworth	56 min
Jul 15, 2:21 AM CDT	Severe Thunderstorm Warning	MKX	Waukesha	39 min
Jul 15, 2:25 AM CDT	Special Marine Warning	MKX		95 min
Jul 15, 2:25 AM CDT	Special Marine Warning	MKX		95 min
Jul 15, 2:30 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine	60 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2003 Every severe thunderstorm warning in 2003

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; radar from the NEXRAD Level II archive.