Alert archive / Wisconsin / Areal Flood Warnings in 2018

Areal Flood Warning 3, NWS Green Bay, WI

September 17, 2018Brown County, Wisconsin

NWS Green Bay, WI issued this areal flood warning at Sep 17, 2018, 10:42 PM CDT for Brown County, Wisconsin. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 17, 2018, 10:42 PM CDT (03:42 UTC)
Expired: Sep 18, 2018, 4:05 AM CDT
In force: 5 hr
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Flood severity: None

County Brown County, WI

The radar

The Green Bay radar (KGRB), 10 km from the middle of the area, began a volume at 03:46 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 00:00Z, 3.7 hours before the alert went out and 9 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: 1680 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1502 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at Sep 17, 9:23 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Sep 17, 9:23 PM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, Sep 17, 2:40 PM CDT, 8 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Green Bay WI
240 PM CDT Mon Sep 17 2018

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-181945-
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-
240 PM CDT Mon Sep 17 2018

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

.DAY ONE...Tonight

There is a chance of thunderstorms tonight. Widespread severe
weather is not expected, but a few strong storms with gusty
winds and hail are possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

There is a chance of thunderstorms at times from Tuesday through
Thursday night. Some thunderstorms may be strong to severe
Thursday afternoon into Thursday evening. Heavy rainfall is
possible from Wednesday afternoon into Thursday night, but timing
and amounts are uncertain at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

LMZ521-522-541>543-181945-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
240 PM CDT Mon Sep 17 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 tonight which may pose a
hazard to mariners.

Hazardous conditions to small craft are expected tonight on Lake
Michigan, due to increasing northeast winds and building waves.
Boaters on Green Bay are urged to exercise caution tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Thunderstorms are possible at times from Tuesday through Thursday
night. Any storms may pose a hazard to mariners.

Conditions that are hazardous to small craft may develop on Lake
Michigan Thursday into Thursday night.

Eckberg/Cooley

In the hours before

Local storm report, Sep 17, 8:07 PM CDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
807 PM CDT MON SEP 17 2018

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

0805 PM     FLOOD            4 ESE GREEN BAY         44.49N 87.93W
09/17/2018                   BROWN              WI   NWS EMPLOYEE

            4-5 INCHES OF WATER IN THE STREET.

&&

BERSCH

Local storm report, Sep 17, 8:24 PM CDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
824 PM CDT MON SEP 17 2018

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

0745 PM     TSTM WND DMG     KIMBERLY                44.27N 88.34W
09/17/2018                   OUTAGAMIE          WI   LAW ENFORCEMENT

            TREES DOWN. TIME ESTIMATED.

&&

BERSCH

Local storm report, Sep 17, 8:25 PM CDT, 2 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREEN BAY WI
825 PM CDT MON SEP 17 2018

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

0815 PM     HEAVY RAIN       1 NE GREEN BAY          44.52N 87.99W
09/17/2018  M3.00 INCH       BROWN              WI   PUBLIC

            SOCIAL MEDIA REPORT

&&

BERSCH

Special weather statement, Sep 17, 8:29 PM CDT, 2 hours 13 minutes before

Special Weather Statement
National Weather Service Green Bay WI
829 PM CDT MON SEP 17 2018

WIZ039-040-050-180230-
Kewaunee-Manitowoc-Brown-
829 PM CDT MON SEP 17 2018

...THUNDERSTORM OVER BROWN...WESTERN KEWAUNEE AND NORTHWESTERN
MANITOWOC COUNTIES...

At 825 PM CDT, radar detected a cluster of thunderstorms centered
over Brown County. The strongest storms were over the southeast part
of the county, but additional storms were over southwest Kewaunee
County and northwest Manitowoc County, as well as northwest Brown
County. The overall movement of the storms was southeast at 15 mph.
The storms are expected to gradually shift southeast into southern
Kewaunee County and Manitowoc County during the next hour to hour
and a half.

Heavy rainfall was occurring with the storms. In addition, isolated
wind gusts to 50 mph are possible.

Locations impacted include...
Green Bay, Bay Shore Park, Luxemburg, Denmark, Bellevue Town, Oneida,
De Pere, Howard, Ashwaubenon and Bellevue.

Torrential rainfall may cause localized flooding. Do not drive your
vehicle through flooded roadways.

LAT...LON 4422 8804 4424 8805 4424 8819 4459 8819
      4459 8820 4467 8820 4468 8812 4467 8793
      4463 8793 4467 8784 4466 8769 4416 8772
TIME...MOT...LOC 0125Z 290DEG 12KT 4441 8793

Skowronski

Local storm report, Sep 17, 9:35 PM CDT, 1 hour 7 minutes before

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Local storm report, Sep 17, 10:04 PM CDT, 38 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:26 PM CDT	Special Weather Statement	GRB	Outagamie	49 min
Sep 17, 7:35 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie	40 min
Sep 17, 7:43 PM CDT	Special Weather Statement	GRB	Brown	47 min
Sep 17, 7:48 PM CDT	Areal Flood Advisory	GRB	Brown	117 min
Sep 17, 8:29 PM CDT	Special Weather Statement	GRB	Brown	61 min
Sep 17, 8:33 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	30 min
Sep 17, 8:36 PM CDT	Special Marine Warning	GRB		39 min
Sep 17, 8:40 PM CDT	Flash Flood Warning	GRB	Brown	2 hr

Nearby

Areal Flood Warnings in Wisconsin, 2018 Every areal flood warning 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.