Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 61, NWS Green Bay, WI

June 20, 2007Menominee County, Oconto County, Shawano County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 20, 2007, 4:37 PM CDT for Menominee County, Oconto County, Shawano County, Wisconsin. It was in force for 53 min. 1 report 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: Jun 20, 2007, 4:37 PM CDT (21:37 UTC)
Expired: Jun 20, 2007, 5:30 PM CDT
In force: 53 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

Counties Menominee County, WI, Oconto County, WI, Shawano County, WI

The radar

The Green Bay radar (KGRB), 62 km from the middle of the area, began a volume at 21:37 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
Jun 20, 5:13 PM CDT	HAIL 0.75	1 Ne Bowler, WI

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 20, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.6 hours before the alert went out and 64 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: 1326 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 137 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 KGRB 202137
SVRGRB
WIC078-083-115-202230-
/O.NEW.KGRB.SV.W.0061.070620T2137Z-070620T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
437 PM CDT WED JUN 20 2007

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MENOMINEE COUNTY IN NORTHEAST WISCONSIN...
  OCONTO COUNTY IN NORTHEAST WISCONSIN...
  SHAWANO COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 530 PM CDT

* AT 433 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...AND DAMAGING WINDS.
   THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 10 MILES
  NORTHEAST OF MOUNTAIN TO 8 MILES NORTH OF WITTENBERG...OR ALONG A
  LINE EXTENDING FROM 33 MILES SOUTHEAST OF CRANDON TO 16 MILES SOUTH
  OF ANTIGO...AND MOVING SOUTHEAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WITTENBERG AND NEOPIT BY 445 PM...
  KESHENA BY 505 PM...
  SHAWANO BY 515 PM...

SEVERE THUNDERSTORMS PRODUCE STRONG WINDS AND HAIL. STAY AWAY FROM
WINDOWS UNTIL THE STORM PASSES. IF OUTDOORS...GO TO A STURDY SHELTER.

LAT...LON 4502 8916 4503 8899 4511 8895 4511 8864
      4523 8866 4536 8836 4536 8831 4521 8831
      4520 8820 4503 8813 4502 8795 4489 8782
      4471 8799 4470 8820 4461 8824 4462 8856
      4470 8861 4471 8911 4478 8918

$$

3 follow-up statements

000 
WWUS53 KGRB 202150
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
445 PM CDT WED JUN 20 2007

WIC075-078-083-115-202230-
/O.CON.KGRB.SV.W.0061.000000T0000Z-070620T2230Z/
MENOMINEE-SHAWANO-MARINETTE-OCONTO-
445 PM CDT WED JUN 20 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR OCONTO...MARINETTE...SHAWANO AND MENOMINEE COUNTIES...

AT 441 PM...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
  THUNDERSTORM NEAR ANIWA IN THE FAR NORTHWEST CORNER OF SHAWANO
  COUNTY...MOVING SOUTHEAST AT 35 MPH TOWARDS TOWARDS SHEPLEY AND 
  BOWLER. ANOTHER STRONG OR SEVERE STORM WAS 10 MILES WEST OF 
  MOUNTAIN MOVING SOUTHEAST AT 35 MPH TOWARDS SURING.


LAT...LON 4502 8916 4503 8899 4511 8895 4511 8864
      4523 8866 4536 8836 4536 8831 4521 8831
      4520 8820 4503 8813 4502 8795 4489 8782
      4471 8799 4470 8820 4461 8824 4462 8856
      4470 8861 4471 8911 4478 8918

$$

RDM

000 
WWUS53 KGRB 202218
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
516 PM CDT WED JUN 20 2007

WIC075-078-083-202226-
/O.CAN.KGRB.SV.W.0061.000000T0000Z-070620T2230Z/
MENOMINEE-MARINETTE-OCONTO-
516 PM CDT WED JUN 20 2007

...THE SEVERE THUNDERSTORM WARNING FOR OCONTO...FAR NORTHERN 
MARINETTE AND MENOMINEE COUNTIES IS CANCELLED...

LAT...LON 4502 8916 4503 8899 4490 8899 4491 8875
      4486 8872 4480 8872 4480 8865 4485 8857
      4484 8855 4483 8858 4477 8859 4479 8830
      4473 8830 4471 8829 4461 8824 4462 8856
      4470 8861 4471 8911 4478 8918

$$

WIC115-202230-
/O.CON.KGRB.SV.W.0061.000000T0000Z-070620T2230Z/
SHAWANO-
516 PM CDT WED JUN 20 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SHAWANO COUNTY...

AT 511 PM...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM 
PRODUCING LARGE HAIL.  THIS STORM WAS LOCATED NEAR MORGAN...OR 
ABOUT 14 MILES WEST OF SHAWANO...MOVING SOUTHEAST AT 30 MPH TOWARDS 
SHAWANO. 


LAT...LON 4502 8916 4503 8899 4490 8899 4491 8875
      4486 8872 4480 8872 4480 8865 4485 8857
      4484 8855 4483 8858 4477 8859 4479 8830
      4473 8830 4471 8829 4461 8824 4462 8856
      4470 8861 4471 8911 4478 8918

$$

RDM

000 
WWUS53 KGRB 202228
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
527 PM CDT WED JUN 20 2007

WIC115-202237-
/O.EXP.KGRB.SV.W.0061.000000T0000Z-070620T2230Z/
SHAWANO-
527 PM CDT WED JUN 20 2007

...THE SEVERE THUNDERSTORM WARNING FOR SHAWANO COUNTY EXPIRES AT 530
PM CDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED...BUT 
GUSTY WINDS AND SMALL HAIL ARE STILL POSSIBLE WITH THE SCATTERED 
THUNDERSTORMS IN SHAWANO COUNTY.

LAT...LON 4502 8916 4503 8899 4490 8899 4491 8875
      4486 8872 4480 8872 4480 8865 4485 8857
      4484 8855 4483 8858 4477 8859 4479 8830
      4473 8830 4471 8829 4461 8824 4462 8856
      4470 8861 4471 8911 4478 8918

$$

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.

NWS Green Bay, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 1:45 PM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, Jun 20, 1:45 PM CDT, 2 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
145 PM CDT WED JUN 20 2007

.SHORT TERM...TONIGHT AND THURSDAY...MAIN FOCUS IS ON SVR TSTMS THIS
AFTERNOON/EVENING.

COMBINATION OF MODERATE INSTABILITY...STRONG SHEAR AND DYNAMIC FORCING
WILL GENERATE SCT SVR TSTMS WITH DAMAGING WIND AND LARGE HAIL THIS
AFTERNOON AND EVG. EXPECT THE FOCUS TO BE PRIMARILY OVER C/EC WI AFTER
00Z. TSTMS SHOULD SHIFT SOUTH OF THE FA LATER THIS EVG...WITH A LULL IN
THE ACTIVITY LATE TONIGHT INTO THURSDAY MORNING. HAVE ADDED A CHC OF
TSTMS BACK INTO THE FCST OVER C/EC WI THURSDAY AFTERNOON...AS ELEVATED
INSTABILITY NORTH OF THE STALLED FRONTAL BOUNDARY WORKS ITS WAY BACK
INTO THE AREA.

GUIDANCE TEMPERATURES LOOK REASONABLE.

.LONG TERM...THURSDAY NIGHT THRU NEXT WEDNESDAY. MEDIUM RANGE MODELS IN
REASONABLE AGREEMENT THROUGH THIS FORECAST PERIOD. THE ECMWF IS STRONGER
THAN THE UKMET AND GFS WITH AN UPPER LOW PASSING TO OUR SOUTHWEST FRIDAY
NIGHT. THE NORTHWEST UPPER FLOW ARGUES FOR GENERALLY DRY WEATHER UNTIL
THE UPPER FLOW FLATTENS EARLY NEXT WEEK.

.AVIATION...A COLD FRONT WILL MOVE THROUGH THE AREA DURING THE LATE
AFTERNOON AND EARLY EVENING. STRONG THUNDERSTORMS WITH HAIL AND GUSTY
WINDS ARE POSSIBLE...BUT ACTIVITY WILL BE SCATTERED. THE FRONT WILL
CLEAR THE AREA BETWEEN 00Z AND 03Z...AND THEN IT WILL BE VFR THE REST OF
TONIGHT AND THURSDAY.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

RDM
WEATHER.GOV/GREENBAY

Hazardous weather outlook, Jun 20, 11:15 AM CDT, 5 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1115 AM CDT WED JUN 20 2007

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-211100-
VILAS-ONEIDA-FOREST-FLORENCE-NORTHERN MARINETTE-SOUTHERN MARINETTE-
LINCOLN-LANGLADE-MENOMINEE-NORTHERN OCONTO-SOUTHERN OCONTO-DOOR-
MARATHON-SHAWANO-WOOD-PORTAGE-WAUPACA-OUTAGAMIE-BROWN-KEWAUNEE-WAUSHARA-
WINNEBAGO-CALUMET-MANITOWOC-
1115 AM CDT WED JUN 20 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH-CENTRAL AND NORTHEAST
WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS OVER THE ENTIRE FORECAST AREA THIS
AFTERNOON...AND OVER PORTIONS OF CENTRAL AND EAST CENTRAL WISCONSIN
THIS EVENING. THERE IS A SLIGHT RISK OF SEVERE STORMS OVER THE ENTIRE
FORECAST AREA...ESPECIALLY FROM 3 PM TO 9 PM. THE PRIMARY THREAT WILL
BE DAMAGING WIND GUSTS OVER 60 MPH AND HAIL UP TO GOLF BALL SIZE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS ARE POSSIBLE ACROSS PORTIONS OF CENTRAL WISCONSIN THURSDAY
NIGHT AND ACROSS THE ENTIRE REGION FRIDAY NIGHT. THESE STORMS ARE NOT
EXPECTED TO BE SEVERE.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE ACROSS NORTH CENTRAL AND FAR
NORTHEAST WISCONSIN SUNDAY NIGHT AND MONDAY...AND ACROSS THE ENTIRE
REGION MONDAY NIGHT AND TUESDAY. THESE STORMS ARE NOT EXPECTED TO BE
SEVERE AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

LMZ521-522-541>543-564-211100-
THE BAY OF GREEN BAY SOUTH OF A LINE FROM CEDAR RIVER MI TO ROCK ISLAND
PASSAGE-LAKE MICHIGAN FROM WASHINGTON ISLAND TO SHEBOYGAN-THE ADJOINING
WISCONSIN WATERS OF LAKE MICHIGAN OUT TO MID-LAKE-
1115 AM CDT WED JUN 20 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WATERS OF CENTRAL AND
SOUTHERN GREEN BAY...AND LAKE MICHIGAN FROM ROCK ISLAND PASSAGE
TO SHEBOYGAN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. THERE IS
A SLIGHT RISK OF SEVERE STORMS WITH GUSTY WINDS AND LARGE HAIL.

A SMALL CRAFT ADVISORY IS IN EFFECT THIS AFTERNOON AND EVENING OVER THE
BAY OF GREEN BAY...AND THE LAKE MICHIGAN WATERS ADJACENT TO DOOR COUNTY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS ARE POSSIBLE ACROSS THE LAKE MICHIGAN WATERS FRIDAY NIGHT.
THESE STORMS ARE NOT EXPECTED TO BE SEVERE.

ADDITIONAL THUNDERSTORMS ARE POSSIBLE NORTH OF STURGEON BAY SUNDAY NIGHT
AND MONDAY...AND ACROSS THE ENTIRE REGION MONDAY NIGHT AND TUESDAY.
THESE STORMS ARE NOT EXPECTED TO BE SEVERE AT THIS TIME.

KIECKBUSCH
WEATHER.GOV/GREENBAY

In the hours before

Local storm report, Jun 20, 3:41 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
341 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0335 PM     HAIL             WOODBORO                45.59N 89.55W
06/20/2007  E1.00 INCH       ONEIDA             WI   TRAINED SPOTTER

&&

Local storm report, Jun 20, 3:46 PM CDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
346 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0344 PM     HAIL             2 N THREE LAKES         45.82N 89.16W
06/20/2007  M0.50 INCH       ONEIDA             WI   TRAINED SPOTTER

&&

Local storm report, Jun 20, 4:10 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
410 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0402 PM     HAIL             IRMA                    45.34N 89.66W
06/20/2007  M0.75 INCH       LINCOLN            WI   AMATEUR RADIO

&&

Local storm report, Jun 20, 4:13 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
413 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0413 PM     HAIL             5 N ARGONNE             45.73N 88.88W
06/20/2007  M1.00 INCH       FOREST             WI   TRAINED SPOTTER

&&

Local storm report, Jun 20, 4:32 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
432 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     HAIL             11 E MERRILL            45.18N 89.45W
06/20/2007  E0.75 INCH       LINCOLN            WI   PUBLIC

&&

Local storm report, Jun 20, 4:34 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
434 PM CDT WED JUN 20 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 PM     HAIL             11 W ANTIGO             45.15N 89.38W
06/20/2007  E1.75 INCH       LANGLADE           WI   PARK/FOREST SRVC

            1/2 INCH TO 1 3/4 INCH HAIL.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 2:53 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	52 min
Jun 20, 2:54 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Vilas	66 min
Jun 20, 3:25 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Marinette	55 min
Jun 20, 3:40 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	20 min
Jun 20, 3:45 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	45 min
Jun 20, 4:00 PM CDT	Severe Thunderstorm Warning	GRB	Forest	45 min
Jun 20, 4:03 PM CDT	Severe Thunderstorm Warning	GRB	Langlade	42 min
Jun 20, 4:20 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	55 min
Jun 20, 4:44 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	20 min
Jun 20, 4:48 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Marinette	57 min
Jun 20, 5:02 PM CDT	Special Marine Warning	GRB		73 min
Jun 20, 5:18 PM CDT	Severe Thunderstorm Warning	GRB	Door	57 min
Jun 20, 5:21 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	54 min
Jun 20, 5:46 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	29 min
Jun 20, 5:49 PM CDT	Special Marine Warning	GRB		50 min
Jun 20, 6:04 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	19 min
Jun 20, 6:12 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage	63 min
Jun 20, 6:17 PM CDT	Special Marine Warning	GRB		63 min
Jun 20, 6:18 PM CDT	Severe Thunderstorm Warning	GRB	Door	27 min
Jun 20, 6:21 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	28 min
Jun 20, 6:47 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	58 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2007 Every severe thunderstorm warning in 2007

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.