Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS Green Bay, WI

May 15, 20174 counties in Wisconsin

NWS Green Bay, WI issued this special weather statement at May 15, 2017, 3:18 PM CDT for 4 counties in Wisconsin. It was in force for 57 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
May 15, 2017, 3:18 PM CDT (20:18 UTC)
Expired
May 15, 2017, 4:15 PM CDT
In force
57 min
Issued by
NWS Green Bay, WI

Counties Marathon County, WI, Portage County, WI, Waushara County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 140 km from the middle of the area, began a volume at 20:19 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.3 hours before the alert went out and 142 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 2017-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 2017-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2746 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 May 15, 2:38 PM CDT, 40 minutes earlier.

Area forecast discussion, May 15, 2:38 PM CDT, 40 minutes before
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Hazardous weather outlook, May 15, 2:45 PM CDT, 33 minutes before
Hazardous Weather Outlook
National Weather Service Green Bay WI
245 PM CDT Mon May 15 2017

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-161945-
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-
245 PM CDT Mon May 15 2017

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

.DAY ONE...Rest of the Afternoon and Tonight

A band of showers and thunderstorms are expected to work into
central and parts of north-central Wisconsin during the rest of
the afternoon and then into northeast Wisconsin toward evening.
The risk of severe weather is low with these storms.

Later tonight, additional thunderstorms are expected to develop
along a warm front around midnight into early Tuesday morning.
Some of the storms may produce damaging winds, large hail and
locally heavy rainfall, especially south of a Marshfield to
Manitowoc line.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Periods of thunderstorms are expected Tuesday through Wednesday
night, and also next weekend. A few strong storms are possible
over central and north-central Wisconsin on Tuesday and Tuesday
night, then for all locations Wednesday and Wednesday night, but
it is too early to determine the severe weather threat at this
time. Heavy rainfall is also possible over far north-central
Wisconsin on Wednesday and Wednesday night.

.SPOTTER INFORMATION STATEMENT...

Formal spotter activation is not anticipated for the remainder
of the afternoon and this evening, but may be needed after
midnight south of a Marshfield to Manitowoc line. Spotters are
requested to report heavy rainfall over an inch, hail or wind
gusts over 35 mph.

LMZ521-522-541>543-161945-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
245 PM CDT Mon May 15 2017

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

.DAY ONE...Tonight

Thunderstorms are likely tonight. Hail and heavy rainfall will be
possible with any thunderstorms.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

A chance of thunderstorms will occur at times Tuesday through
Wednesday night, and also into the weekend.

Winds and waves hazardous to small craft could occur Tuesday
night through Thursday.

Eckberg/TDH

In the hours before

Local storm report, May 15, 9:34 AM CDT, 5 hours 44 minutes before
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Local storm report, May 15, 10:25 AM CDT, 4 hours 53 minutes before
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Special weather statement, May 15, 10:33 AM CDT, 4 hours 45 minutes before
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Special weather statement, May 15, 3:18 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
May 15, 7:36 AM CDTSpecial Weather StatementGRBVilas54 min
May 15, 8:47 AM CDTSpecial Weather StatementGRBFlorence, Forest, Oneida, Vilas73 min
May 15, 10:33 AM CDTSpecial Weather StatementGRBOneida, Vilas57 min

Nearby

Special Weather Statements in Wisconsin, 2017Every special weather statement in 2017

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.