Alert archive / Wisconsin / Flash Flood Warnings in 2026

Flash Flood Warning 2, NWS Green Bay, WI

April 13, 20265 counties in Wisconsin

NWS Green Bay, WI issued this flash flood warning at Apr 13, 2026, 8:06 PM CDT for 5 counties in Wisconsin. It was in force for 8 hr. 4 reports 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: Apr 13, 2026, 8:06 PM CDT (01:06 UTC)
Expired: Apr 14, 2026, 4:00 AM CDT
In force: 8 hr
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Marathon County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Waupaca County, WI

The radar

The Green Bay radar (KGRB), 48 km from the middle of the area, began a volume at 01:10 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
Apr 13, 8:23 PM CDT	FLOOD	1 W Shawano, WI	Report from mPING: River/Creek overflowing; Cropland/Yard/Basement Flooding.
Apr 13, 8:53 PM CDT	FLASH FLOOD	1 Wnw Briarton, WI	Water over the road on Highway 47 near Navarino. Law enforcement putting out signs indicating high water.
Apr 13, 9:35 PM CDT	RAIN 2.6	1 Ene Clintonville, WI	Rainfall total through 9:15 pm. Rain will continue for several more hours.
Apr 14, 4:00 AM CDT	RAIN 5.1	4.5 Sw Tigerton, WI	&&

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 flash flood warning; the first came 47 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.1 hours before the alert went out and 371 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: 1474 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1240 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 387 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 19.3

Open this sounding in Storm Lab

The text

As transmitted.

557 
WGUS53 KGRB 140106
FFWGRB
WIC073-087-097-115-135-140700-
/O.NEW.KGRB.FF.W.0002.260414T0106Z-260414T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Green Bay WI
806 PM CDT Mon Apr 13 2026

The National Weather Service in Green Bay has issued a

* Flash Flood Warning for...
  Southeastern Marathon County in central Wisconsin...
  Northern Portage County in central Wisconsin...
  Northern Outagamie County in northeastern Wisconsin...
  Shawano County in northeastern Wisconsin...
  Northern Waupaca County in northeastern Wisconsin...

* Until 200 AM CDT.

* At 806 PM CDT, local law enforcement reported thunderstorms
  producing heavy rain across the warned area. Between 2 and 3 inches
  of rain have fallen. Additional rainfall amounts of 1 to 2 inches
  are possible in the warned area. Flash flooding is ongoing or
  expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Law enforcement reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Stevens Point, Shawano, Clintonville, Mosinee, Pulaski, Whiting,
  Bevent, Wittenberg, Embarrass, Navarino Wildlife Area, Plover,
  Seymour, Stockton, Knowlton, Belle Plaine, Angelica and Bonduel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4468 8973 4479 8973 4486 8874 4485 8825
      4477 8825 4471 8824 4468 8824 4468 8825
      4466 8825 4466 8824 4459 8825 4459 8821
      4450 8819 4445 8972

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

JLA

3 follow-up statements

485 
WGUS73 KGRB 140410
FFSGRB

Flash Flood Statement
National Weather Service Green Bay WI
1110 PM CDT Mon Apr 13 2026

WIC073-087-097-115-135-140700-
/O.CON.KGRB.FF.W.0002.000000T0000Z-260414T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marathon WI-Outagamie WI-Portage WI-Shawano WI-Waupaca WI-
1110 PM CDT Mon Apr 13 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 AM CDT TUESDAY FOR
SOUTHEASTERN MARATHON, NORTHERN PORTAGE, NORTHERN OUTAGAMIE, SHAWANO
AND NORTHERN WAUPACA COUNTIES...

At 1110 PM CDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2 and 5 inches
of rain have fallen. Additional rainfall amounts up to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected to
begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams, urban
         areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Stevens Point, Shawano, Clintonville, Mosinee, Pulaski, Whiting,
  Bevent, Wittenberg, Embarrass, Navarino Wildlife Area, Plover,
  Seymour, Stockton, Knowlton, Belle Plaine, Angelica and Bonduel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4468 8973 4479 8973 4486 8874 4485 8825
      4477 8825 4471 8824 4468 8824 4468 8825
      4466 8825 4466 8824 4459 8825 4459 8821
      4450 8819 4445 8972

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Bersch

914 
WGUS53 KGRB 140658
FFWGRB
WIC073-087-097-115-135-140900-
/O.EXT.KGRB.FF.W.0002.000000T0000Z-260414T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Green Bay WI
158 AM CDT Tue Apr 14 2026

The National Weather Service in Green Bay has extended the

* Flash Flood Warning for...
  Southeastern Marathon County in central Wisconsin...
  Northern Portage County in central Wisconsin...
  Northern Outagamie County in northeastern Wisconsin...
  Shawano County in northeastern Wisconsin...
  Northern Waupaca County in northeastern Wisconsin...

* Until 400 AM CDT.

* At 158 AM CDT, local law enforcement reported thunderstorms
  producing heavy rain across the warned area. Between 2 and 5 inches
  of rain have fallen. Additional rainfall amounts up to 0.2 inches
  are possible in the warned area. Flash flooding is ongoing or
  expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Law enforcement reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Stevens Point, Shawano, Clintonville, Mosinee, Pulaski, Whiting,
  Bevent, Wittenberg, Embarrass, Navarino Wildlife Area, Plover,
  Seymour, Stockton, Knowlton, Belle Plaine, Angelica and Bonduel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4468 8973 4479 8973 4486 8874 4485 8825
      4477 8825 4471 8824 4468 8824 4468 8825
      4466 8825 4466 8824 4459 8825 4459 8821
      4450 8819 4445 8972

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Bersch

927 
WGUS73 KGRB 140858
FFSGRB

Flash Flood Statement
National Weather Service Green Bay WI
358 AM CDT Tue Apr 14 2026

WIC073-087-097-115-135-140908-
/O.EXP.KGRB.FF.W.0002.000000T0000Z-260414T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marathon WI-Outagamie WI-Portage WI-Shawano WI-Waupaca WI-
358 AM CDT Tue Apr 14 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING FOR
SOUTHEASTERN MARATHON, NORTHERN PORTAGE, NORTHERN OUTAGAMIE, SHAWANO
AND NORTHERN WAUPACA COUNTIES...

Flash flooding is no longer expected to pose a threat. However, a
flood advisory is in effect until 10 AM this morning as some roads
remain flooded, along with some rising rivers, creeks and streams.
Please continue to heed remaining road closures.

A Flood Watch remains in effect until 700 AM CDT Wednesday for
portions of central, east central, and northeast Wisconsin.

&&

LAT...LON 4468 8973 4479 8973 4486 8874 4485 8825
      4477 8825 4471 8824 4468 8824 4468 8825
      4466 8825 4466 8824 4459 8825 4459 8821
      4450 8819 4445 8972

$$

Bersch

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Apr 13, 7:46 PM CDT, 20 minutes earlier. Its key messages:

Thunderstorms will develop late this afternoon and continue into the overnight hours with hail in excess of 2 inches, damaging winds and a tornado possible with the strongest storms. The highest risk is across central Wisconsin.
Rainfall amounts of 1 to 3 inches across parts of central into east-central Wisconsin may lead to additional flood concerns through tonight.
An active stretch of weather continues through late week with continued periods of showers and storms. The risk area for severe storms shifts south on Tuesday, but extends north into parts of central and east-central Wisconsin.
Minor to moderate river flooding is ongoing or forecast to occur on several area rivers. Expect many rivers to rise this week due to additional rain and runoff from Upper Michigan, with the greatest impacts expected on the Menominee River, where some locations may see major flooding during the mid to late part of the week.

Area forecast discussion, Apr 13, 7:46 PM CDT, 20 minutes before

Area Forecast Discussion
National Weather Service Green Bay WI
746 PM CDT Mon Apr 13 2026

Updated aviation portion for 00Z TAF issuance

.KEY MESSAGES...

- Thunderstorms will develop late this afternoon and continue
  into the overnight hours with hail in excess of 2 inches,
  damaging winds and a tornado possible with the strongest
  storms. The highest risk is across central Wisconsin.

- Rainfall amounts of 1 to 3 inches across parts of central into
  east-central Wisconsin may lead to additional flood concerns
  through tonight.

- An active stretch of weather continues through late week with
  continued periods of showers and storms. The risk area for
  severe storms shifts south on Tuesday, but extends north into
  parts of central and east-central Wisconsin.

- Minor to moderate river flooding is ongoing or forecast to
  occur on several area rivers. Expect many rivers to rise this
  week due to additional rain and runoff from Upper Michigan,
  with the greatest impacts expected on the Menominee River,
  where some locations may see major flooding during the mid to
  late part of the week.

&&

.DISCUSSION...
Issued at 245 PM CDT Mon Apr 13 2026

Tonight: Severe Storms/Heavy Rain

Early afternoon surface analysis indicated a surface low over
central Nebraska with a warm front snaking eastward across
northern Iowa into central Wisconsin. MLCAPE has increased to
around 1000 J/kg across central Wisconsin with some inhibition
noted.

Late this afternoon, expect more focused storm
initiation/intensification generally in the vicinity of the
warm front and nose of the low- level jet. Surface-based
instability is maximized over central Wisconsin (1000-2000 J/kg)
by late this afternoon with effective shear around 40-50 kts.
Combined with steep lapse rates already sampled by the 18Z GRB
RAOB, the environment will be supportive of large to very large
hail. The tornado risk likely will be highest along the warm
front from west-central Wisconsin into perhaps central
Wisconsin as the low-level jet increases early this evening and
overlaps the warm front/instability axis. Damaging wind risk
will depend on the degree of upscale growth/organization of
storms. Overall, the severe weather risk lessens with northward
extent.

Precipitable water values remain near the top of climatology for
mid April. HREF probability matched mean 24-hr rainfall is in
the 1 to 3 inch range across parts of central into east-central
Wisconsin through tonight, on the nose of the low-level jet.
However, rainfall amounts will depend on the organization and
degree of training. This rainfall could exacerbate already
saturated soils.

Areas of fog may also develop overnight behind the storms.

Tuesday: Additional storms

The front slides south on Tuesday with the instability axis also
displaced south. The placement of the boundary will impact the
northward extent of severe weather during the
afternoon/evening. RAP hodographs show lesser low-level shear
although an elongated profile favorable for large hail and
winds. Currently the highest risk of severe storms is across
southern Wisconsin, but could extend into parts of east-central
Wisconsin.

Wednesday-Monday: Active into the weekend

Southwest flow aloft persists into late week keeping the area in
a warm, wet pattern. Another shortwave trough will bring
additional shower (40-80%) chances Wednesday into Thursday. A
more dynamic trough is slated to impact the region late Friday
into the weekend bringing additional widespread rainfall and
storms. The northward extent of greater instability is somewhat
uncertain with this system, impacting severe weather potential,
but this will be something to watch in the coming days. Drier
and cooler weather is expected behind this system for early next
week.

&&

.AVIATION...for 00Z TAF Issuance
Issued at 746 PM CDT Mon Apr 13 2026

Widespread showers and storms will continue to impact AUW/CWA/ATW
/GRB/MTW this evening. The strongest storms could contain heavy
rain, hail and gusty winds. Some fog will along linger near Lake
Michigan. The activity will end west to east from 03-07z. Low
clouds and fog will linger overnight, with clouds lifting and
scattering out later Tuesday morning and afternoon. Another round
of storms is possible at ATW/GRB/MTW Tuesday afternoon.

&&

.HYDROLOGY...
Issued at 245 PM CDT Mon Apr 13 2026

Flooding is expected to continue on several area rivers during
the week, and will be exacerbated by periodic heavy rainfall.
Runoff from Upper Michigan is still expected to bring moderate
to major flooding along the Menominee River, especially during
the mid to late part of the week. If you live near a river or
stream, keep a close eye on water levels this week and monitor
the latest Flood Warnings from the National Weather Service in
Green Bay.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 7 AM CDT Tuesday for WIZ013-018>022-030-031-
035>040-045-048>050-073-074.
&&

DISCUSSION.....JM
AVIATION.......Bersch
HYDROLOGY......Kieckbusch/JM

Hazardous weather outlook, Apr 13, 2:51 PM CDT, 5 hours 15 minutes before

Hazardous Weather Outlook
National Weather Service Green Bay WI
251 PM CDT Mon Apr 13 2026

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-142000-
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-
251 PM CDT Mon Apr 13 2026

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

.DAY ONE...Tonight

Elevated water levels or flooding continue along some rivers.

Severe storms, including heavy rainfall, large to very large hail,
damaging winds and tornado or two are possible late this afternoon
into tonight. The highest risk of severe storms is across central
into east- central Wisconsin.

Additional flooding may occur for areas that receive heavy
rainfall tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

There is a chance of severe thunderstorms south of a line from
Wisconsin Rapids to Sturgeon bay during the late afternoon and
evening on Tuesday. Large hail and strong winds will be the
primary threats.

Additional thunderstorms are possible Wednesday afternoon into
Wednesday night, and again Friday night into Saturday.

Elevated water levels and at least minor flooding will continue
along many rivers through the week. Runoff from the Upper
Peninsula will likely result in moderate to possibly major flooding
on the Menominee River during the mid to late part of the week.

.SPOTTER INFORMATION STATEMENT...

Spotters should report severe weather and flooding to the
National Weather Service in Green Bay.

LMZ521-522-541>543-142000-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
251 PM CDT Mon Apr 13 2026

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

.DAY ONE...Tonight

Thunderstorms, some possibly strong to severe, are expected
tonight.

Areas of fog are possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Monday

Thunderstorms will be possible at times Tuesday through Wednesday
night, and again Friday night into Saturday. Severe storms will
be possible Tuesday evening.

In the hours before

Local storm report, Apr 13, 7:43 PM CDT, 23 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
743 PM CDT Mon Apr 13 2026

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

0737 PM     Hail             2 WNW Green Bay         44.52N 88.03W
04/13/2026  M1.25 Inch       Brown              WI   Trained Spotter

            Quarter sized to half dollar sized hail.
            Corner of Allard Ave. and Camm Place.

&&

JLA

Local storm report, Apr 13, 7:46 PM CDT, 20 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
746 PM CDT Mon Apr 13 2026

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

0735 PM     Hail             1 NNE Ashwaubenon       44.50N 88.05W
04/13/2026  E0.88 Inch       Brown              WI   Broadcast Media

            At WLUK-TV.

&&

JLA

Local storm report, Apr 13, 7:48 PM CDT, 18 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
748 PM CDT Mon Apr 13 2026

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

0606 PM     Hail             2 N Marshfield          44.69N 90.16W
04/13/2026  M2.00 Inch       Marathon           WI   Public

&&

Local storm report, Apr 13, 7:51 PM CDT, 15 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
751 PM CDT Mon Apr 13 2026

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

0728 PM     Flood            1 NNW Clintonville      44.63N 88.76W
04/13/2026                   Waupaca            WI   Trained Spotter

            Flooding on N. 12th St. near Sun Valley
            Manor.

&&

JLA

Local storm report, Apr 13, 7:53 PM CDT, 13 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
753 PM CDT Mon Apr 13 2026

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

0715 PM     Hail             1 NW Clintonville       44.63N 88.77W
04/13/2026  M1.00 Inch       Waupaca            WI   Cocorahs

&&

Local storm report, Apr 13, 7:57 PM CDT, 9 minutes before

Preliminary Local Storm Report
National Weather Service Green Bay WI
757 PM CDT Mon Apr 13 2026

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

0730 PM     Flood            1 NW Clintonville       44.63N 88.77W
04/13/2026                   Waupaca            WI   Cocorahs

            Very heavy rain observed of 1.25 inches in
            30 minutes. Several streets under water.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 7:02 PM CDT	Areal Flood Advisory	GRB	Outagamie, Shawano, Waupaca	3 hr
Apr 13, 7:19 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	14 min
Apr 13, 7:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	GRB	Outagamie, Shawano, Waupaca	38 min
Apr 13, 7:30 PM CDT	Special Weather Statement	GRB	Brown	30 min
Apr 13, 7:31 PM CDT	Special Marine Warning	GRB		89 min
Apr 13, 7:36 PM CDT	Special Weather Statement	GRB	Waupaca	24 min
Apr 13, 7:39 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Kewaunee	51 min
Apr 13, 7:41 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Shawano, Waupaca	49 min
Apr 13, 7:57 PM CDT	Special Marine Warning	GRB		2 hr
Apr 13, 7:58 PM CDT	Severe Thunderstorm Warning	GRB	Wood	47 min
Apr 13, 8:22 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Kewaunee, Manitowoc	42 min
Apr 13, 8:36 PM CDT	Areal Flood Advisory	GRB	Brown, Oconto, Outagamie	3 hr
Apr 13, 8:36 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	35 min
Apr 13, 9:10 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waushara, Wood	50 min
Apr 13, 9:26 PM CDT	Special Weather Statement	GRB	Brown	34 min
Apr 13, 9:30 PM CDT	River Flood Warning	GRB	Waupaca	5 days
Apr 13, 9:32 PM CDT	River Flood Warning	GRB	Wood	63 hr
Apr 13, 9:56 PM CDT	Special Weather Statement	GRB	Waupaca	34 min
Apr 13, 10:01 PM CDT	Flash Flood Warning	GRB	Brown, Door, Kewaunee, Oconto, Outagamie	6 hr
Apr 13, 10:16 PM CDT	River Flood Warning	GRB	Wood	70 hr
Apr 13, 10:21 PM CDT	Areal Flood Advisory	GRB	Brown, Calumet, Kewaunee, Manitowoc, Outagamie, Portage and 4 more	6 hr
Apr 13, 10:35 PM CDT	Special Weather Statement	GRB	Brown, Calumet, Outagamie, Winnebago	55 min
Apr 13, 10:54 PM CDT	Flash Flood Warning	GRB	Brown, Calumet, Kewaunee, Manitowoc, Outagamie, Winnebago	5 hr
Apr 13, 11:27 PM CDT	Special Weather Statement	GRB	Calumet, Manitowoc	33 min
Apr 14, 2:14 AM CDT	Flash Flood Watch	GRB	Waupaca	3 hr
Apr 14, 2:40 AM CDT	River Flood Warning	GRB	Brown	21 days
Apr 14, 3:52 AM CDT	Areal Flood Advisory	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Marathon and 6 more	6 hr
Apr 14, 4:57 AM CDT	River Flood Warning	GRB	Marinette	6 days
Apr 14, 6:02 AM CDT	Areal Flood Warning	GRB	Outagamie, Shawano, Waupaca	5 hr
Apr 14, 8:46 AM CDT	Flash Flood Watch	GRB	Shawano, Waupaca	25 hr
Apr 14, 9:07 AM CDT	River Flood Warning	GRB	Wood	21 days
Apr 14, 9:08 AM CDT	River Flood Warning	GRB	Manitowoc	21 days
Apr 14, 9:43 AM CDT	Areal Flood Warning	GRB	Brown, Door, Kewaunee, Oconto, Outagamie, Shawano and 1 more	9 hr
Apr 14, 9:48 AM CDT	Areal Flood Warning	GRB	Brown, Calumet, Kewaunee, Manitowoc, Outagamie	9 hr
Apr 14, 10:16 AM CDT	Flash Flood Warning Considerable damage threat	GRB	Waupaca	6 hr
Apr 14, 11:23 AM CDT	River Flood Warning	GRB	Marathon	34 hr
Apr 14, 2:09 PM CDT	River Flood Warning	GRB	Kewaunee	32 hr
Apr 14, 4:37 PM CDT	River Flood Warning	GRB	Brown, Outagamie	44 hr
Apr 14, 5:53 PM CDT	Severe Thunderstorm Warning	GRB	Wood	37 min
Apr 14, 6:10 PM CDT	Severe Thunderstorm Warning	GRB	Waushara, Winnebago	50 min
Apr 14, 6:33 PM CDT	Special Weather Statement	GRB	Portage, Wood	27 min
Apr 14, 6:46 PM CDT	Areal Flood Advisory	GRB	Portage, Wood	2 hr
Apr 14, 6:51 PM CDT	Areal Flood Warning	GRB	Brown, Door, Kewaunee, Oconto, Outagamie, Shawano and 1 more	9 hr
Apr 14, 6:53 PM CDT	Areal Flood Warning	GRB	Brown, Calumet, Kewaunee, Manitowoc, Outagamie	9 hr

Nearby

Flash Flood Warnings in Wisconsin, 2026 Every flash flood warning in 2026

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.