Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 23, NWS Green Bay, WI

May 24, 2007Florence County, Marinette County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 24, 2007, 4:50 PM CDT for Florence County, Marinette County, Wisconsin. It was in force for 36 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: May 24, 2007, 4:50 PM CDT (21:50 UTC)
Expired: May 24, 2007, 5:26 PM CDT
In force: 36 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

Counties Florence County, WI, Marinette County, WI

The radar

The Green Bay radar (KGRB), 112 km from the middle of the area, began a volume at 21:53 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
May 24, 5:00 PM CDT	TSTM WND DMG	10 W Athelstane, WI	TREES AND POWERLINES DOWN SCATTERED ACROSS NORTHERN MARINETTE CO APPROX 500 PM TO 515 PM.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 10 minutes after it went out.

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
May 24, 2:25 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.8 hours before the alert went out and 114 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: 17 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 95 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 242150
SVRGRB
WIC037-075-242230-
/O.NEW.KGRB.SV.W.0023.070524T2150Z-070524T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
450 PM CDT THU MAY 24 2007

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN FLORENCE COUNTY IN NORTHEAST WISCONSIN...
  MARINETTE COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 530 PM CDT

* AT 448 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING WINDS TO 60 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 25 MILES SOUTHWEST OF
  GOODMAN TO 20 MILES SOUTHWEST OF POUND...OR ALONG A LINE EXTENDING
  FROM 25 MILES SOUTHEAST OF CRANDON TO 17 MILES EAST OF SHAWANO...
  AND MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WAUSAUKEE...PEMBINE AND CRIVITZ

LAT...LON 4601 8845 4543 8839 4539 8828 4525 8824
      4505 8805 4512 8770 4575 8790

$$

TH

2 follow-up statements

000 
WWUS53 KGRB 242205
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
505 PM CDT THU MAY 24 2007

WIC037-075-242230-
/O.CON.KGRB.SV.W.0023.000000T0000Z-070524T2230Z/
FLORENCE WI-MARINETTE WI-
505 PM CDT THU MAY 24 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT 
FOR MARINETTE AND EASTERN FLORENCE COUNTIES...

AT 501 PM...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING WINDS TO 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM BEAVER TO 11 MILES SOUTHWEST
OF COMMONWEALTH...OR ALONG A LINE EXTENDING FROM 22 MILES WEST OF
MENOMINEE TO 14 MILES WEST OF KINGSFORD...MOVING NORTHEAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CRIVITZ...DUNBAR...ATHELSTANE...LOOMIS...MIDDLE INLET...
  PORTERFIELD...WAUSAUKEE...AMBERG...AURORA...BEECHER...PEMBINE AND
  NIAGARA.

THE THUNDERSTORM WILL PRODUCE WINDS UP TO 60 MPH. IF OUTDOORS...MOVE
TO A STURDY BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM PASSES.

LAT...LON 4601 8845 4543 8839 4539 8828 4525 8824
      4505 8805 4512 8770 4575 8790

$$

HELMAN/SRF

000 
WWUS53 KGRB 242226
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
526 PM CDT THU MAY 24 2007

WIC037-075-242236-
/O.CAN.KGRB.SV.W.0023.000000T0000Z-070524T2230Z/
FLORENCE WI-MARINETTE WI-
526 PM CDT THU MAY 24 2007

...THE SEVERE THUNDERSTORM WARNING FOR MARINETTE AND EASTERN FLORENCE
COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED OUT OF
THE AREA.

LAT...LON 4601 8845 4543 8839 4539 8828 4525 8824
      4505 8805 4512 8770 4575 8790

$$

HELMAN/SRF

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 May 24, 4:00 PM CDT, 50 minutes earlier.

Area forecast discussion, May 24, 4:00 PM CDT, 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
400 PM CDT THU MAY 24 2007

.SHORT TERM...TONIGHT AND FRIDAY
COLD FRONT MOVING ACROSS THE AREA WAS TRIGGERING SHOWERS AND
THUNDERSTORMS THIS AFTERNOON. 850MB WINDS OF 50 TO 55 KNOTS MIXING
DOWN WITH THE STRONGER STORMS. TREES WERE REPORTED DOWN IN SPOTS
ACROSS CENTRAL WISCONSIN. THE LINE OF THUNDERSTORMS MOVING RAPIDLY TO
THE EAST...SO SEVERE WEATHER EPISODE WILL NOT LAST AS LONG AS THE
9 PM SEVERE THUNDERSTORM WATCH ISSUANCE. IN MATTER OF FACT...MAY
BE ABLE TO CANCEL A FEW OF THE WESTERN COUNTIES BEFORE THE ZONE
ISSUANCE. WILL WAIT TO THE LAST MINUTE TO SEE IF WE CAN REMOVE SOME
OF THE COUNTIES ACROSS CENTRAL WISCONSIN BEFORE ZONE/GRID ISSUANCE
AROUND 4 PM.

HIGH PRESSURE BUILDS INTO THE REGION TONIGHT WITH COOLER TEMPERATURES
ON FRIDAY. CURRENT MIN TEMPERATURES LOOKED REASONABLE AND FOLLOWED.
TRENDED TOWARD THE COOLER MET/MAV GUIDANCE FOR FRIDAY COMPARED TO
THE CONSIDERABLY WARMER NGM GUIDANCE.

.LONG TERM...TWO SYSTEMS IN THE EXTENDED WILL GIVE AREA A CHANCE OF
PCPN. AGAIN MODELS FAIRLY SIMILAR ON BIG PICTURE BUT GFS TENDING FASTER
ON TIMING.  HAVE TRIED TO TREND TOWARDS BLEND...PER NCEP FAVORING ECMWF
IN THE LATER PERIODS.

CHANGES TO PREVIOUS FORECAST PACKAGE CENTER AROUND SYSTEM FOR THIS
WEEKEND.  FRONT STARTS TO MAKE WAY BACK NORTH OVER WI AS A WARM FRONT
FRI NIGHT AS UPPER LOW MAKES WAY EAST OUT OF PAC NW INTO THE NORTHERN
LAKES. MOISTURE RETURN GOOD FROM GULF WITH PWATS ABOVE 1 INCH BY SAT
MORN.  HAVE BROUGHT PCPN AND CLOUDS IN EARLIER.  UPPER LOW SLOW TO MOVE
OUT WITH CYCLONIC FLOW LINGERING INTO SUNDAY.  LAPSE RATES SOMEWHAT
UNSTABLE...WILL CARRY SMALL CHANCE OF SHOWERS FOR THE NORTHERN
COUNTIES...THOUGH DRYING PUSHING IN RAPIDLY SAT NIGHT WITH JET PUSHING
THROUGH.

LITTLE CHANGE MADE IN TEMPERATURES WITH HOLIDAY TEMPERATURES EXPECTED TO
BE NEAR OR SLIGHTLY BELOW NORMS.

.AVIATION...THUNDERSTORMS WILL AFFECT THE WAUSAU...CENTRAL WISCONSIN
AND RHINELANDER AIRPORTS THROUGH 22Z...WITH SCATTERED SHOWERS
AFFECTING THESE SITES THROUGH 01Z. BRIEF IFR CONDITIONS EXPECTED
WITH THE THUNDERSTORMS...THEN MVFR CONDITIONS BEHIND THE COLD FRONT.
CLOUDS WILL CLEAR OUT LATER TONIGHT. THUNDERSTORMS WITH A BRIEF PERIOD
OF IFR CONDITIONS WILL AFFECT THE GREEN BAY...APPLETON AND OSHKOSH
SITES BETWEEN 22Z AND 00Z THIS EVENING. PRECIPITATION WILL TAPER OFF
TO SHOWERS. SIMILIAR CONDITIONS ARE EXPECTED BEHIND THE COLD FRONT
A FEW HOURS LATER THAN THE WAUSAU AND RHINELANDER SITES.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...

WIND ADVISORY UNTIL 6 PM THIS AFTERNOON
WIZ038>040-045-048>050-
&&

ECKBERG/TE
WEATHER.GOV/GREENBAY

Hazardous weather outlook, May 24, 11:45 AM CDT, 5 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREEN BAY WI
1145 AM CDT THU MAY 24 2007

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-251645-
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-
1145 AM CDT THU MAY 24 2007

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WITH DAMAGING WINDS THIS
AFTERNOON AND EARLY EVENING. THE BEST CHANCE OF SEVERE STORMS WILL OCCUR
BETWEEN 2 PM AND 8 PM. LOCALLY HEAVY RAINFALL...WITH AMOUNTS OF AN INCH
OR TWO...CAN ALSO BE EXPECTED...ESPECIALLY OVER CENTRAL AND NORTH
CENTRAL WISCONSIN THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS ALSO A CHANCE OF THUNDERSTORMS SATURDAY AFTERNOON AND SATURDAY
NIGHT. IT IS TOO EARLY TO TELL IF THEY WILL BE SEVERE...SO BE SURE TO
MONITOR LATER FORECASTS FOR THE MEMORIAL DAY WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS MAY NEED TO BE ACTIVATED THIS AFTERNOON IN CENTRAL AND
NORTH CENTRAL WISCONSIN...AND DURING THE LATE AFTERNOON AND EARLY
EVENING IN NORTHEAST AND EAST CENTRAL WISCONSIN.

LMZ521-522-541>543-564-251645-
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-
1145 AM CDT THU MAY 24 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

A SMALL CRAFT ADVISORY IS IN EFFECT THROUGH LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE WILL BE ANOTHER CHANCE OF THUNDERSTORMS SATURDAY AND SATURDAY
NIGHT. IT IS TOO EARLY TO DETERMINE WHETHER THEY MIGHT BE SEVERE.

TSK/RDM
WEATHER.GOV/GREENBAY
ECKBERG/TE
WEATHER.GOV/GREENBAY

In the hours before

Local storm report, May 24, 4:01 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
401 PM CDT THU MAY 24 2007

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

0340 PM     TSTM WND DMG     5 W WILD ROSE           44.18N 89.35W
05/24/2007                   WAUSHARA           WI   LAW ENFORCEMENT

            SCATTERED TREES DOWN ACROSS COUNTY.

&&

Local storm report, May 24, 4:02 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
402 PM CDT THU MAY 24 2007

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

0400 PM     TSTM WND GST     WAUPACA                 44.34N 89.06W
05/24/2007  M53 MPH          WAUPACA            WI   TRAINED SPOTTER

&&

Local storm report, May 24, 4:04 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
404 PM CDT THU MAY 24 2007

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

0345 PM     TSTM WND DMG     EAGLE RIVER             45.91N 89.25W
05/24/2007                   VILAS              WI   LAW ENFORCEMENT

            NUMEROUS TREES AND POWER LINES DOWN IN EASTERN PART OF
            VILAS COUNTY.

&&

Local storm report, May 24, 4:17 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
417 PM CDT THU MAY 24 2007

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

0400 PM     TSTM WND DMG     WAUPACA                 44.34N 89.06W
05/24/2007                   WAUPACA            WI   LAW ENFORCEMENT

            TREES DOWN IN AND AROUND CITY OF WAUPACA.

&&

Local storm report, May 24, 4:34 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
434 PM CDT THU MAY 24 2007

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

0419 PM     TSTM WND GST     CLINTONVILLE            44.61N 88.75W
05/24/2007  E50 MPH          WAUPACA            WI   AMATEUR RADIO

&&

Local storm report, May 24, 4:39 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
439 PM CDT THU MAY 24 2007

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

0423 PM     TSTM WND DMG     5 W SHAWANO             44.78N 88.69W
05/24/2007                   SHAWANO            WI   LAW ENFORCEMENT

            TREES DOWN OVER THE CENTRAL PART OF THE COUNTY

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 10:46 AM CDT	Wind Advisory	GRB	Brown, Calumet, Kewaunee, Manitowoc, Outagamie, Waushara and 1 more	5 hr
May 24, 2:34 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	41 min
May 24, 3:03 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	27 min
May 24, 3:26 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	49 min
May 24, 3:30 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waushara	45 min
May 24, 3:46 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	44 min
May 24, 4:07 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	28 min
May 24, 4:25 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest	45 min
May 24, 4:29 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Shawano	24 min
May 24, 4:33 PM CDT	Special Marine Warning	GRB		100 min
May 24, 4:42 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	26 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.