Alert archive / Wisconsin / Flash Flood Warnings in 2020

Flash Flood Warning 2, NWS Milwaukee, WI

June 10, 2020Fond du Lac County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Jun 10, 2020, 4:43 PM CDT for Fond du Lac County, Wisconsin. It was in force for 3 hr. 3 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: Jun 10, 2020, 4:43 PM CDT (21:43 UTC)
Expired: Jun 10, 2020, 7:45 PM CDT
In force: 3 hr
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Flood severity: None

County Fond du Lac County, WI

The radar

The Milwaukee radar (KMKX), 79 km from the middle of the area, began a volume at 21:44 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
Jun 10, 5:46 PM CDT	FLASH FLOOD	2 Ssw Fond Du Lac, WI	I-41 IN FOND DU LAC COUNTY CLOSED (BOTH LANES) FROM MILITARY RD TO US 151 DUE TO WATER OVER ROADWAY.
Jun 10, 6:05 PM CDT	HEAVY RAIN 2.77	2 Sw Fond Du Lac, WI	ASOS STATION KFLD FOND DU LAC AIRPORT.
Jun 10, 6:16 PM CDT	HEAVY RAIN 2.7	2 Sse Fond Du Lac, WI	REPORTED FROM WFRV.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.7 hours before the alert went out and 96 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -150 m²/s²
0-3 km storm-relative helicity: -31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

982 
WGUS53 KMKX 102143
FFWMKX
WIC039-110045-
/O.NEW.KMKX.FF.W.0002.200610T2143Z-200611T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Milwaukee/Sullivan WI
443 PM CDT Wed Jun 10 2020

The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Warning for...
  Central Fond du Lac County in east central Wisconsin...

* Until 745 PM CDT.

* At 443 PM CDT, Local law enforcement reported thunderstorms 
  producing heavy rain across the warned area. Between 1 and 2 
  inches of rain have fallen. Flash flooding is already occurring 
  especially on area roadways.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Fond Du Lac, North Fond Du Lac, Lomira, Oakfield, Southern Lake 
  Winnebago, Taycheedah, Lamartine, Byron, Eden, Peebles and Oak 
  Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4363 8870 4385 8853 4385 8827 4363 8840
      4363 8845 4363 8854 4363 8859 4363 8863
      4363 8866

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...0.75-1.5 INCHES IN 2 HOURS 

$$

WAGNER

2 follow-up statements

224 
WGUS73 KMKX 102253
FFSMKX

Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
553 PM CDT Wed Jun 10 2020

WIC039-110045-
/O.CON.KMKX.FF.W.0002.000000T0000Z-200611T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond du Lac WI-
553 PM CDT Wed Jun 10 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT THIS 
EVENING FOR CENTRAL FOND DU LAC COUNTY...

At 553 PM CDT, Local law enforcement reported thunderstorms produced 
heavy rain across the warned area. Between 1 and 3 inches of rain 
have fallen. Flash flooding is ongoing. WIDOT reporting road 
closures on I-41 on southwest side of Fond Du Lac between Military 
Road and US 151 due to water over the highway.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Fond Du Lac, North Fond Du Lac, Lomira, Oakfield, Southern Lake 
  Winnebago, Taycheedah, Lamartine, Byron, Eden, Peebles and Oak 
  Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4363 8870 4385 8853 4385 8827 4363 8840
      4363 8845 4363 8854 4363 8859 4363 8863
      4363 8866

FLASH FLOOD...OBSERVED

$$

WAGNER

980 
WGUS73 KMKX 110038
FFSMKX

Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
738 PM CDT Wed Jun 10 2020

WIC039-110048-
/O.EXP.KMKX.FF.W.0002.000000T0000Z-200611T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond du Lac WI-
738 PM CDT Wed Jun 10 2020

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM CDT THIS EVENING FOR 
CENTRAL FOND DU LAC COUNTY...

The heavy rain has ended and the flood waters are receding. Flooding 
is no longer expected to pose a threat. Please continue to heed 
remaining road closures.

LAT...LON 4363 8870 4385 8853 4385 8827 4363 8840
      4363 8845 4363 8854 4363 8859 4363 8863
      4363 8866

$$

WAGNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 1:17 PM CDT	Special Weather Statement	MKX	Waukesha	28 min
Jun 10, 1:22 PM CDT	Severe Thunderstorm Warning	MKX	Washington, Waukesha	38 min
Jun 10, 1:48 PM CDT	Special Weather Statement	MKX	Washington	27 min
Jun 10, 1:53 PM CDT	Special Marine Warning	MKX		63 min
Jun 10, 4:19 PM CDT	Areal Flood Advisory	MKX	Columbia, Dodge	116 min
Jun 10, 5:27 PM CDT	Special Marine Warning	MKX		33 min
Jun 10, 6:04 PM CDT	Areal Flood Advisory	MKX	Milwaukee	116 min

Nearby

Flash Flood Warnings in Wisconsin, 2020 Every flash flood warning in 2020

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.