Alert archive / Wisconsin / Special Weather Statements in 2018

Special Weather Statement, NWS Green Bay, WI

October 9, 2018Winnebago County, Wisconsin

NWS Green Bay, WI issued this special weather statement at Oct 9, 2018, 7:10 PM CDT for Winnebago County, Wisconsin. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 9, 2018, 7:10 PM CDT (00:10 UTC)
Expired
Oct 9, 2018, 8:00 PM CDT
In force
50 min
Issued by
NWS Green Bay, WI

County Winnebago County, WI

The radar

The Green Bay radar (KGRB), 62 km from the middle of the area, began a volume at 00:09 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.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 315 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, Davenport, at 00:00Z on 2018-10-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 447 joules per kilogram.LCLEL10008507005003002001001 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, Davenport, at 00:00Z on 2018-10-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 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
447 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1281 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 9, 6:43 PM CDT, 27 minutes earlier.

Area forecast discussion, Oct 9, 6:43 PM CDT, 27 minutes before
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Hazardous weather outlook, Oct 9, 3:00 PM CDT, 4 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Green Bay WI
300 PM CDT Tue Oct 9 2018

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-102000-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
300 PM CDT Tue Oct 9 2018

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Tonight

There is a chance of thunderstorms over central and east-central
Wisconsin. Some of these storms could be strong to severe with
damaging winds and large hail being the main threats.

Locally heavy rainfall is possible mainly across north-central
and central Wisconsin tonight. This could lead to urban and small
stream flooding. A Flood Watch remains in effect for north-
central and central Wisconsin.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

The chance of thunderstorms will continue Wednesday. Isolated
storms could produce damaging winds on Wednesday afternoon,
particularly across parts of central and eastern Wisconsin.

Locally heavy rainfall is also possible which could lead to
additional urban and small stream flooding, particularly across
north-central and central Wisconsin where a Flood Watch is in
effect through early Wednesday evening. A few rivers are forecast
to surpass bankfull sometime during the latter part of the week.

Low temperatures are forecast to fall into the lower to middle 30s
over the Fox Valley and lakeshore areas on Thursday and Friday
nights. Temperatures this cold may result in a frost or freeze.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight. Spotters are requested
to report rainfall amounts over an inch tonight.

LMZ521-522-541>543-102000-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
300 PM CDT Tue Oct 9 2018

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

There is a chance of thunderstorms through tonight. Any storms
will pose a hazard for boaters on the lake and bay.

.DAYS TWO THROUGH SEVEN...Wednesday through Tuesday

The chance of thunderstorms will continue through early Wednesday
evening, and could pose a hazard to boaters.

Persistent and increasing southerly winds or high waves will
create hazardous conditions Wednesday ahead of a slow moving cold
front. Behind the departing system, gusty west to northwest winds
will create hazardous conditions for small craft Wednesday night
into Thursday. A Small Craft Advisory is in effect Wednesday and
Wednesday evening for the Lake Michigan nearshore areas.

Kallas/Kurimski

In the hours before

Special weather statement, Oct 9, 4:56 PM CDT, 2 hours 14 minutes before
Special Weather Statement
National Weather Service Green Bay WI
456 PM CDT TUE OCT 9 2018

WIZ045-092300-
Waushara WI-
456 PM CDT TUE OCT 9 2018

...STRONG THUNDERSTORM HEADED TOWARD WAUSHARA COUNTY...

At 455 PM CDT, Doppler radar was tracking a strong thunderstorm near
Westfield, or 13 miles south of Wautoma, moving northeast at 30 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Wautoma, Redgranite, Silver Lake, Pine River, Dakota, Mount Morris,
Saxeville, Wild Rose, Spring Lake and Lohrville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4424 8922 4424 8889 4423 8889 4398 8912
      4398 8943
TIME...MOT...LOC 2155Z 216DEG 28KT 4388 8937

AK
Special weather statement, Oct 9, 5:28 PM CDT, 1 hour 42 minutes before
Special Weather Statement
National Weather Service Green Bay WI
528 PM CDT TUE OCT 9 2018

WIZ049-050-092315-
Calumet WI-Manitowoc WI-
528 PM CDT TUE OCT 9 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CALUMET AND WEST CENTRAL
MANITOWOC COUNTIES UNTIL 615 PM CDT...

At 528 PM CDT, Doppler radar was tracking a strong thunderstorm near
St Anna, or 16 miles northwest of Plymouth, moving north at 25 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Chilton around 545 PM CDT.
  Brillion around 610 PM CDT.

Other locations impacted by this storm include Killsnake Wildlife
Area, Cato, Reedsville, Grimms, New Holstein, Charlesburg, Collins,
Steinthal, Potter and Meggers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4392 8816 4394 8816 4394 8825 4422 8810
      4416 8784 4390 8805
TIME...MOT...LOC 2228Z 200DEG 20KT 4395 8817

RDM
Special weather statement, Oct 9, 5:40 PM CDT, 1 hour 30 minutes before
Special Weather Statement
National Weather Service Green Bay WI
540 PM CDT TUE OCT 9 2018

WIZ036-045-092330-
Waushara WI-Portage WI-
540 PM CDT TUE OCT 9 2018

...STRONG THUNDERSTORM MOVING INTO SOUTHERN PORTAGE COUNTY...

At 538 PM CDT, Doppler radar was tracking a strong thunderstorm over
Plainfield, or 16 miles northwest of Wautoma, moving northeast at 30
mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Amherst, Plainfield, Almond, Hancock, Amherst Junction, Blaine,
Nelsonville, Keene, Fancher and Arnott.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4409 8944 4417 8960 4423 8960 4454 8937
      4450 8922 4436 8922
TIME...MOT...LOC 2238Z 211DEG 26KT 4423 8950

AK
Local storm report, Oct 9, 6:22 PM CDT, 48 minutes before
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Special weather statement, Oct 9, 6:36 PM CDT, 34 minutes before
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Special weather statement, Oct 9, 7:10 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Oct 9, 7:23 PM CDTSpecial Weather StatementGRBWood52 min
Oct 10, 7:53 AM CDTMarine Dense Fog AdvisoryGRB4 hr
Oct 10, 10:09 AM CDTRiver Flood WarningGRBMarathon10 hr
Oct 10, 12:33 PM CDTRiver Flood WarningGRBWood39 hr
Oct 10, 4:18 PM CDTRiver Flood WarningGRBMarathon43 hr

Nearby

Special Weather Statements in Wisconsin, 2018Every special weather statement in 2018

Sources

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