Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS Green Bay, WI

July 30, 2012Door County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2012, 7:44 PM CDT for Door County, Wisconsin. It was in force for 61 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, 7:44 PM CDT (00:44 UTC)
Expired
Jul 30, 2012, 8:45 PM CDT
In force
61 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Door County, WI

The radar

The Green Bay radar (KGRB), 112 km from the middle of the area, began a volume at 00:45 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

TimeReportWhereRemark
Jul 30, 8:06 PM CDTHAIL 0.75Egg Harbor, WI
Jul 30, 8:15 PM CDTHAIL 1Egg Harbor, WI

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

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 30, 1:28 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Alpena, MI (KAPX), launched 00:00Z, 0.7 hours before the alert went out and 367 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-pSkew-T log-p diagram, Alpena, MI at 00:00Z on 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 952 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 00:00Z on 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
952 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1396 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

110 
WUUS53 KGRB 310044
SVRGRB
WIC029-310145-
/O.NEW.KGRB.SV.W.0086.120731T0044Z-120731T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
744 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DOOR COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 845 PM CDT

* AT 740 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 16 MILES EAST OF NEWPORT STATE
  PARK TO 7 MILES SOUTHEAST OF MARINETTE...AND MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  JACKSONPORT AROUND 800 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
CARLSVILLE...INSTITUTE...WHITEFISH DUNES STATE PARK...VALMY AND
WHITEFISH BAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND DEADLY
LIGHTNING. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS.

THIS WARNING REPLACES THE PREVIOUSLY ISSUED WARNING FOR DOOR 
COUNTY.

&&

LAT...LON 4530 8689 4532 8696 4528 8691 4528 8696
      4520 8698 4521 8703 4512 8699 4512 8700
      4514 8702 4479 8730 4489 8744 4507 8729
      4511 8731 4509 8727 4517 8728 4517 8719
      4530 8708 4531 8699 4543 8694 4543 8682
TIME...MOT...LOC 0043Z 291DEG 27KT 4517 8663 4499 8751
WIND...HAIL 60MPH 1.00IN

$$

TH
2 follow-up statements
633 
WWUS53 KGRB 310113
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
813 PM CDT MON JUL 30 2012

WIC029-310145-
/O.CON.KGRB.SV.W.0086.000000T0000Z-120731T0145Z/
DOOR WI-
813 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DOOR COUNTY
UNTIL 845 PM CDT...

AT 808 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 11 MILES EAST OF JACKSONPORT TO
10 MILES SOUTH OF MARINETTE...MOVING SOUTHEAST AT 15 MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF DOOR COUNTY...
INCLUDING THE FOLLOWING LOCATIONS WHITEFISH DUNES STATE PARK...
INSTITUTE AND VALMY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND DEADLY
LIGHTNING. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4515 8722 4515 8716 4515 8710 4513 8705
      4479 8730 4489 8744 4507 8729 4511 8731
      4509 8727
TIME...MOT...LOC 0113Z 324DEG 14KT 4501 8695 4492 8758
WIND...HAIL 60MPH 1.00IN

$$

TH
966 
WWUS53 KGRB 310146
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
846 PM CDT MON JUL 30 2012

WIC029-310156-
/O.EXP.KGRB.SV.W.0086.000000T0000Z-120731T0145Z/
DOOR WI-
846 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR DOOR COUNTY HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4515 8722 4515 8716 4515 8710 4513 8705
      4479 8730 4489 8744 4507 8729 4511 8731
      4509 8727
TIME...MOT...LOC 0113Z 324DEG 14KT 4501 8695 4492 8758

$$

TH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:11 PM CDTSevere Thunderstorm WarningGRBBrown49 min
Jul 30, 7:21 PM CDTSevere Thunderstorm WarningGRBManitowoc54 min
Jul 30, 7:30 PM CDTSevere Thunderstorm WarningGRBKewaunee30 min
Jul 30, 8:14 PM CDTSevere Thunderstorm WarningGRBManitowoc46 min
Jul 30, 8:38 PM CDTSpecial Marine WarningGRB2 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every 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.