Alert archive / Wisconsin / Flash Flood Warnings in 2018

Flash Flood Warning 16, NWS Milwaukee, WI

August 28, 2018Fond du Lac County, Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this flash flood warning at Aug 28, 2018, 4:21 PM CDT for Fond du Lac County, Sheboygan County, Wisconsin. It was in force for 9 hr. 2 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
Aug 28, 2018, 4:21 PM CDT (21:21 UTC)
Expired
Aug 29, 2018, 1:13 AM CDT
In force
9 hr
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Flood severity
None

Counties Fond du Lac County, WI, Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 81 km from the middle of the area, began a volume at 21:19 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.

What was reported inside it

TimeReportWhereRemark
Aug 28, 5:15 PM CDTHEAVY RAIN 5.5Sheboygan Falls, WISTORM TOTAL SO FAR. REPORTED VIA SOCIAL MEDIA.
Aug 29, 12:00 AM CDTHEAVY RAIN 2.42Fond Du Lac, WI24 HOUR TOTAL ENDING AT MIDNIGHT.

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, 9.4 hours before the alert went out and 79 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 2018-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2018-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
41 J/kg
Mixed-layer CIN
-407 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

809 
WGUS53 KMKX 282121
FFWMKX
WIC039-117-290315-
/O.NEW.KMKX.FF.W.0016.180828T2121Z-180829T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Milwaukee/Sullivan WI
421 PM CDT TUE AUG 28 2018

The National Weather Service in Milwaukee/Sullivan has issued a

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

* Until 1015 PM CDT.

* At 419 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Sheboygan, Fond Du Lac, Waupun, Plymouth, Sheboygan Falls, Ripon,
  North Fond Du Lac, Howards Grove, Oostburg, Kohler, Cedar Grove,
  Campbellsport, Random Lake, Oakfield, Rosendale, Elkhart Lake,
  Brandon, Southern Lake Winnebago, Taycheedah and Ashford.

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Do not 
drive around barricades.

&&

LAT...LON 4367 8770 4353 8779 4354 8840 4363 8841
      4363 8888 4390 8889 4389 8841 4394 8840
      4394 8834 4393 8816 4389 8816 4389 8772
      4379 8769

$$

MRC
2 follow-up statements
541 
WGUS53 KMKX 290149
FFWMKX
WIC039-117-291115-
/O.EXT.KMKX.FF.W.0016.000000T0000Z-180829T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Milwaukee/Sullivan WI
849 PM CDT TUE AUG 28 2018

The National Weather Service in Milwaukee/Sullivan has extended the

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

* Until 615 AM CDT Wednesday.

* At 848 PM CDT, Emergency management reported flash flooding across 
  the warned area.  Many roads are closed and impassable.  As runoff 
  continues overnight, water may still rise in some locations. 

* Some locations that will experience flooding include...
  Sheboygan, Fond Du Lac, Waupun, Plymouth, Sheboygan Falls, Ripon,
  North Fond Du Lac, Howards Grove, Oostburg, Kohler, Cedar Grove,
  Campbellsport, Random Lake, Oakfield, Rosendale, Elkhart Lake,
  Brandon, Southern Lake Winnebago, Taycheedah and Ashford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4367 8770 4353 8779 4354 8840 4363 8841
      4363 8888 4390 8889 4389 8841 4394 8840
      4394 8834 4393 8816 4389 8816 4389 8772
      4379 8769

$$

BOXELL
353 
WGUS73 KMKX 290613
FFSMKX

Flash Flood Statement
National Weather Service Milwaukee/Sullivan WI
113 AM CDT WED AUG 29 2018

WIC039-117-290622-
/O.CAN.KMKX.FF.W.0016.000000T0000Z-180829T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fond du Lac WI-Sheboygan WI-
113 AM CDT WED AUG 29 2018

...THE FLASH FLOOD WARNING FOR FOND DU LAC AND SHEBOYGAN COUNTIES IS
CANCELLED...

The heavy rain has ended and flash flooding is no longer occurring. 
Please continue to heed any remaining road closures.

LAT...LON 4367 8770 4353 8779 4354 8840 4363 8841
      4363 8888 4390 8889 4389 8841 4394 8840
      4394 8834 4393 8816 4389 8816 4389 8772
      4379 8769

$$

GEHRING

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 9:12 PM CDTSevere Thunderstorm WarningMKXGreen Lake, Marquette48 min
Aug 27, 10:43 PM CDTSpecial Marine WarningMKX92 min
Aug 27, 10:47 PM CDTSevere Thunderstorm WarningMKXSauk43 min
Aug 27, 11:22 PM CDTTornado WarningMKXSauk23 min
Aug 27, 11:36 PM CDTTornado WarningMKXColumbia, Marquette, Sauk24 min
Aug 27, 11:51 PM CDTFlash Flood WarningMKXColumbia, Sauk3 hr
Aug 27, 11:55 PM CDTFlash Flood WarningMKXGreen Lake, Marquette6 hr
Aug 27, 11:57 PM CDTTornado WarningMKXColumbia, Green Lake, Marquette33 min
Aug 28, 12:00 AM CDTFlash Flood WarningMKXFond du Lac, Sheboygan6 hr
Aug 28, 12:51 AM CDTFlash Flood WarningMKXFond du Lac, Sheboygan6 hr
Aug 28, 1:45 AM CDTFlash Flood WarningMKXDodge, Ozaukee, Washington3 hr
Aug 28, 2:43 AM CDTFlash Flood WarningMKXColumbia, Sauk3 hr
Aug 28, 5:45 AM CDTAreal Flood WarningMKXColumbia, Sauk6 hr
Aug 28, 5:53 AM CDTAreal Flood WarningMKXGreen Lake, Marquette6 hr
Aug 28, 11:33 AM CDTRiver Flood WatchMKXOzaukee7 hr
Aug 28, 12:11 PM CDTRiver Flood WarningMKXSauk13 days
Aug 28, 12:11 PM CDTRiver Flood WarningMKXSauk16 days
Aug 28, 2:29 PM CDTSevere Thunderstorm WarningMKXColumbia, Marquette, Sauk46 min
Aug 28, 2:46 PM CDTTornado WarningMKXMarquette44 min
Aug 28, 3:01 PM CDTFlash Flood WarningMKXColumbia, Green Lake, Marquette, Sauk10 hr
Aug 28, 3:06 PM CDTSevere Thunderstorm WarningMKXColumbia, Green Lake, Marquette39 min
Aug 28, 3:12 PM CDTTornado WarningMKXGreen Lake, Marquette33 min
Aug 28, 3:35 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge, Fond du Lac, Green Lake55 min
Aug 28, 3:38 PM CDTTornado Warning Tornado observedMKXFond du Lac, Green Lake37 min
Aug 28, 3:44 PM CDTSevere Thunderstorm WarningMKXColumbia, Dodge33 min
Aug 28, 3:59 PM CDTTornado WarningMKXDodge, Fond du Lac31 min
Aug 28, 4:10 PM CDTTornado Warning Tornado observedMKXDodge, Fond du Lac35 min
Aug 28, 4:13 PM CDTSpecial Marine WarningMKX92 min
Aug 28, 4:15 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac, Ozaukee, Sheboygan, Washington60 min
Aug 28, 4:26 PM CDTTornado Warning Tornado observedMKXFond du Lac, Sheboygan34 min
Aug 28, 4:38 PM CDTFlash Flood WarningMKXOzaukee, Washington7 hr
Aug 28, 4:41 PM CDTSevere Thunderstorm WarningMKXDodge, Milwaukee, Ozaukee, Washington, Waukesha27 min
Aug 28, 6:55 PM CDTRiver Flood WarningMKXSauk63 hr
Aug 28, 6:55 PM CDTRiver Flood WarningMKXOzaukee36 hr
Aug 28, 6:55 PM CDTRiver Flood WarningMKXJefferson20 days

Nearby

Flash Flood Warnings in Wisconsin, 2018Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.