Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 24, NWS Green Bay, WI

August 19, 2011Marinette County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Aug 19, 2011, 4:53 PM CDT for Marinette County, Wisconsin. It was in force for 22 min. 3 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
Aug 19, 2011, 4:53 PM CDT (21:53 UTC)
Expired
Aug 19, 2011, 5:15 PM CDT
In force
22 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon

County Marinette County, WI

The radar

The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 21:55 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
Aug 19, 4:53 PM CDTTSTM WND DMGWausaukee, WITRAILER LEVELED.
Aug 19, 4:54 PM CDTHAIL 1.75Wausaukee, WI
Aug 19, 5:10 PM CDTHAIL 0.5Mcallister, WIDIME SIZE HAIL...SLIGHTLY LARGER THAN HALF INCH.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.9 hours before the alert went out and 102 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, Green Bay/Straub, WI at 12:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 123 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
123 J/kg
Mixed-layer CIN
-204 J/kg
Mixed-layer LCL
1324 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
65 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.

850 
WFUS53 KGRB 192153
TORGRB
WIC075-192215-
/O.NEW.KGRB.TO.W.0024.110819T2153Z-110819T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
453 PM CDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MARINETTE COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 515 PM CDT

* AT 451 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR WAUSAUKEE...OR 24 MILES NORTHWEST OF
  MENOMINEE...AND MOVING SOUTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAUSAUKEE...AND MCALLISTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4528 8769 4522 8772 4540 8809 4552 8798
      4547 8781 4544 8785 4540 8785 4537 8787
      4535 8785 4536 8782 4535 8776 4539 8769
      4537 8765 4534 8764
TIME...MOT...LOC 2152Z 300DEG 33KT 4540 8788

$$

MPC
2 follow-up statements
341 
WWUS53 KGRB 192159
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
459 PM CDT FRI AUG 19 2011

WIC075-192215-
/O.CON.KGRB.TO.W.0024.000000T0000Z-110819T2215Z/
MARINETTE WI-
459 PM CDT FRI AUG 19 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL MARINETTE
COUNTY UNTIL 515 PM CDT...

AT 455 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR WAUSAUKEE...OR 21 MILES NORTHWEST OF
MENOMINEE...MOVING SOUTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  HAROLD...WAGNER...AND MCALLISTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4528 8769 4522 8772 4536 8801 4549 8789
      4547 8781 4544 8785 4540 8785 4537 8787
      4535 8785 4536 8782 4535 8776 4539 8769
      4537 8765 4534 8764
TIME...MOT...LOC 2159Z 300DEG 33KT 4537 8780

$$

MPC
099 
WWUS53 KGRB 192216
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
516 PM CDT FRI AUG 19 2011

WIC075-192226-
/O.EXP.KGRB.TO.W.0024.000000T0000Z-110819T2215Z/
MARINETTE WI-
516 PM CDT FRI AUG 19 2011

...THE TORNADO WARNING FOR EAST CENTRAL MARINETTE COUNTY HAS
EXPIRED...

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

LAT...LON 4528 8769 4522 8772 4536 8801 4549 8789
      4547 8781 4544 8785 4540 8785 4537 8787
      4535 8785 4536 8782 4535 8776 4539 8769
      4537 8765 4534 8764
TIME...MOT...LOC 2159Z 300DEG 33KT 4537 8780

$$

MPC

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 1:35 PM CDTSevere Thunderstorm WarningGRBVilas40 min
Aug 19, 2:07 PM CDTSevere Thunderstorm WarningGRBOneida, Vilas38 min
Aug 19, 2:43 PM CDTSevere Thunderstorm WarningGRBForest, Oneida, Vilas27 min
Aug 19, 3:03 PM CDTSevere Thunderstorm WarningGRBFlorence, Forest53 min
Aug 19, 3:37 PM CDTSevere Thunderstorm WarningGRBFlorence, Forest, Marinette53 min
Aug 19, 4:25 PM CDTSevere Thunderstorm WarningGRBMarinette39 min
Aug 19, 5:02 PM CDTSpecial Marine WarningGRB88 min
Aug 19, 5:17 PM CDTSevere Thunderstorm WarningGRBMarinette44 min
Aug 19, 5:38 PM CDTSevere Thunderstorm WarningGRBDoor28 min
Aug 19, 6:28 PM CDTSpecial Marine WarningGRB62 min

Nearby

Tornado Warnings in Wisconsin, 2011Every tornado warning in 2011Tornadoes in 2011

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.