Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS Milwaukee, WI

July 30, 2012Fond du Lac County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 30, 2012, 10:16 PM CDT for Fond du Lac County, Wisconsin. It was in force for 29 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 30, 2012, 10:16 PM CDT (03:16 UTC)
Expired: Jul 30, 2012, 10:45 PM CDT
In force: 29 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Fond du Lac County, WI

The radar

The Green Bay radar (KGRB), 72 km from the middle of the area, began a volume at 03:19 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.

What was reported inside it

Time	Report	Where	Remark
Jul 30, 10:17 PM CDT	HAIL 0.88	5 N Fond Du Lac, WI	ON HIGHWAY 45 BETWEEN CEMETERY RD AND KINKER RD. TIME ESTIMATED.
Jul 30, 10:27 PM CDT	HAIL 0.75	2 Ne Fond Du Lac, WI	HAIL BETWEEN PEA AND DIME SIZE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 306 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: 693 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

358 
WUUS53 KMKX 310316
SVRMKX
WIC039-310345-
/O.NEW.KMKX.SV.W.0073.120731T0316Z-120731T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1016 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN FOND DU LAC COUNTY IN EAST CENTRAL WISCONSIN...

* UNTIL 1045 PM CDT

* AT 1013 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
  NORTH OF NORTH FOND DU LAC...AND MOVING SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
  NORTHEASTERN FOND DU LAC COUNTY...INCLUDING THE FOLLOWING LOCATIONS
  TAYCHEEDAH...PEEBLES...JOHNSBURG...MOUNT CALVARY AND CALVARY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4391 8830 4388 8816 4386 8816 4371 8828
      4386 8855 4390 8851 4390 8841 4393 8841
TIME...MOT...LOC 0316Z 295DEG 22KT 4387 8845
WIND...HAIL 60MPH 1.00IN

$$

DDV

2 follow-up statements

895 
WWUS53 KMKX 310328
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1028 PM CDT MON JUL 30 2012

WIC039-310345-
/O.CON.KMKX.SV.W.0073.000000T0000Z-120731T0345Z/
FOND DU LAC WI-
1028 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
FOND DU LAC COUNTY UNTIL 1045 PM CDT...

AT 1027 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
NORTHEAST OF FOND DU LAC...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  JOHNSBURG...CALVARY AND MOUNT CALVARY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4392 8833 4391 8830 4388 8816 4386 8816
      4371 8828 4383 8850
TIME...MOT...LOC 0328Z 295DEG 22KT 4384 8836
WIND...HAIL 60MPH 1.00IN

$$

BROOKS

841 
WWUS53 KMKX 310338
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1038 PM CDT MON JUL 30 2012

WIC039-310348-
/O.EXP.KMKX.SV.W.0073.000000T0000Z-120731T0345Z/
FOND DU LAC WI-
1038 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FOND DU LAC
COUNTY WILL EXPIRE AT 1045 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4392 8833 4391 8830 4388 8816 4386 8816
      4371 8828 4383 8850
TIME...MOT...LOC 0338Z 295DEG 22KT 4381 8828

$$

BROOKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 11:05 PM CDT	Special Marine Warning	MKX		55 min
Jul 30, 11:53 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	37 min
Jul 31, 12:05 AM CDT	Special Marine Warning	MKX		55 min
Jul 31, 12:23 AM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	37 min
Jul 31, 12:40 AM CDT	Special Marine Warning	MKX		110 min
Jul 31, 12:50 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Walworth, Waukesha	40 min
Jul 31, 1:11 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine	34 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.