Alert archive / Wisconsin / River Flood Watches in 2018

River Flood Watch 9, NWS Milwaukee, WI

May 14, 2018Jefferson County, Wisconsin

NWS Milwaukee, WI issued this river flood watch at May 14, 2018, 10:37 AM CDT for Jefferson County, Wisconsin. It took effect at May 15, 2018, 7:00 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
May 14, 2018, 10:37 AM CDT (15:37 UTC)
In effect from
May 15, 2018, 7:00 PM CDT
Expired
May 15, 2018, 4:37 AM CDT
In force
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Flood severity
None

County Jefferson County, WI

The radar

The Milwaukee radar (KMKX), 19 km from the middle of the area, began a volume at 15:37 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 river

Written for the forecast point Rock River at Jefferson (JFFW3).

Action stage
8 ft
Minor stage
10 ft
Moderate stage
11 ft
Major stage
13 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05426031, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this river flood watch went out at May 14, 10:06 AM CDT, 31 minutes earlier.

Area forecast discussion, May 14, 10:06 AM CDT, 31 minutes before
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Hazardous weather outlook, May 14, 3:38 AM CDT, 6 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
338 AM CDT Mon May 14 2018

WIZ046-047-051-052-056>060-062>072-150845-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
338 AM CDT Mon May 14 2018

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.

.DAY ONE...Today and Tonight

Numerous thunderstorms along and south of a line from Lone Rock to
Milwaukee will diminish early this morning. They may produce hail
up to one inch and brief heavy rainfall. The rainfall may cause
localized urban and rural flooding.

More thunderstorms are expected this afternoon and tonight, mostly
along and south of a Lone Rock to Madison to Milwaukee line. A few
storms may produce large hail and damaging winds.  These
thunderstorms will also produce heavy rain, which may affect some
of the same areas that have seen significant amounts of rainfall
over the last week. Should this take place, a localized urban and
rural flooding threat may develop.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

The chance for thunderstorms continues into Tuesday morning.

May rivers will remain elevated through the week, with some
locations exceeding flood stage. Those with interests along the
rivers are encouraged to follow the latest river forecasts and
flood warnings.

Thunderstorm chances will return by next weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

LMZ643>646-150845-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
338 AM CDT Mon May 14 2018

This Hazardous Weather Outlook is for portions of Lake Michigan.

.DAY ONE...Today and Tonight

Periods of thunderstorms will affect the near shore waters this
morning and again later this afternoon and tonight. A few storms
may produce damaging winds and large hail.

Areas of fog may become dense at times with visibilities less than
one mile.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There is a chance for thunderstorms Tuesday morning along with the
potential for dense fog.

Thunderstorms will again be possible by next weekend.

www.weather.gov/mkx

MBK

In the hours before

Special weather statement, May 14, 7:23 AM CDT, 3 hours 14 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
723 AM CDT MON MAY 14 2018

WIZ062-063-067-068-141300-
Green-Lafayette-Iowa-Dane-
723 AM CDT MON MAY 14 2018

...A STRONG THUNDERSTORM WILL AFFECT LAFAYETTE...NORTHWESTERN
GREEN...SOUTHEASTERN IOWA AND SOUTHWESTERN DANE COUNTIES...

At 723 AM CDT, a strong thunderstorm was located near Belmont, or 7
miles west of Darlington, moving northeast at 60 mph.

Dime size hail is possible with this storm.

Locations impacted include...
Mount Horeb, Mineral Point, Darlington, New Glarus, Shullsburg,
Belmont, Argyle, Blanchardville, Lamont, Hollandale, Platte Mounds,
Mount Vernon, Yellowstone Lake St Park and Leslie.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4305 8967 4280 8953 4251 9031 4273 9043
      4278 9043
TIME...MOT...LOC 1223Z 246DEG 54KT 4272 9026

MBK
Special weather statement, May 14, 7:53 AM CDT, 2 hours 44 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
753 AM CDT MON MAY 14 2018

WIZ062-063-067>069-141330-
Green-Lafayette-Iowa-Rock-Dane-
753 AM CDT MON MAY 14 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN LAFAYETTE...
GREEN...NORTHWESTERN ROCK AND SOUTHEASTERN DANE COUNTIES...

At 752 AM CDT, a strong thunderstorm was located near Argyle, or 11
miles northwest of Monroe, moving east at 55 mph.

Dime size hail is possible with this storm.

Locations impacted include...
Fitchburg, Stoughton, Oregon, Evansville, Belleville, New Glarus,
Brooklyn, Monticello, Albany, Argyle, Blanchardville, Footville,
Fulton, Magnolia, Dayton, Cooksville and Jordan Center.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4262 8983 4280 8993 4301 8918 4266 8909
TIME...MOT...LOC 1252Z 252DEG 47KT 4274 8978

MBK
Special weather statement, May 14, 8:21 AM CDT, 2 hours 16 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
821 AM CDT MON MAY 14 2018

WIZ063-064-068>070-141400-
Green-Walworth-Rock-Jefferson-Dane-
821 AM CDT MON MAY 14 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN GREEN...
NORTHWESTERN WALWORTH...NORTHERN ROCK...SOUTHEASTERN DANE AND
SOUTHERN JEFFERSON COUNTIES...

At 821 AM CDT, a strong thunderstorm was located near Evansville,
moving east at 60 mph.

Winds in excess of 30 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Janesville, Fitchburg, Whitewater, Stoughton, Fort Atkinson, Oregon,
Milton, Edgerton, Evansville, Palmyra, Brooklyn, Footville, Lake
Koshkonong, Richmond, Fulton, Rome, La Grange, Albion, Hebron and
Magnolia.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4280 8956 4295 8942 4300 8854 4284 8854
      4284 8852 4273 8852 4265 8930
TIME...MOT...LOC 1321Z 264DEG 51KT 4281 8923

SPM
Special weather statement, May 14, 8:54 AM CDT, 1 hour 43 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
854 AM CDT MON MAY 14 2018

WIZ064-065-070-071-141430-
Walworth-Waukesha-Racine-Jefferson-
854 AM CDT MON MAY 14 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN WALWORTH...NORTHWESTERN
RACINE...SOUTHERN WAUKESHA AND SOUTHEASTERN JEFFERSON COUNTIES...

At 854 AM CDT, a strong thunderstorm was located over Palmyra, or 8
miles east of Whitewater, moving east at 40 mph.

Winds in excess of 30 mph and dime size hail are possible with this
storm.

Locations impacted include...
Waukesha, New Berlin, Muskego, Whitewater, Mukwonago, East Troy,
Wales, Wind Lake, Rochester, North Prairie, Palmyra, Big Bend,
Waterford North, Potter Lake, Waterford, Rome, La Grange, Eagle,
Hebron and Honey Creek.

LAT...LON 4275 8870 4283 8878 4284 8877 4284 8879
      4299 8879 4299 8807 4284 8807 4273 8809
      4271 8826
TIME...MOT...LOC 1354Z 268DEG 37KT 4285 8858

SPM

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 12:44 AM CDTSpecial Weather StatementMKXJefferson31 min
May 14, 1:13 AM CDTSpecial Weather StatementMKXWaukesha47 min
May 14, 1:23 AM CDTSpecial Weather StatementMKXWalworth37 min
May 14, 2:19 AM CDTSpecial Weather StatementMKXRacine26 min
May 14, 3:25 AM CDTSpecial Weather StatementMKXIowa35 min
May 14, 4:34 AM CDTRiver Flood WarningMKXWaukesha6 hr
May 14, 7:23 AM CDTSpecial Weather StatementMKXLafayette37 min
May 14, 7:53 AM CDTSpecial Weather StatementMKXGreen37 min
May 14, 8:21 AM CDTSpecial Weather StatementMKXRock39 min
May 14, 8:54 AM CDTSpecial Weather StatementMKXWaukesha36 min
May 14, 9:53 AM CDTRiver Flood WarningMKXRacine59 hr
May 14, 10:03 AM CDTRiver Flood WarningMKXKenosha6 days
May 14, 10:37 AM CDTRiver Flood WatchMKXJefferson, Rock18 hr
May 14, 10:37 AM CDTRiver Flood WatchMKXRacine26 hr
May 14, 10:50 AM CDTMarine Dense Fog AdvisoryMKX16 hr
May 14, 6:56 PM CDTSpecial Weather StatementMKXKenosha34 min

Nearby

River Flood Watches in Wisconsin, 2018Every river flood watch 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.