Alert archive / Wisconsin / Special Weather Statements in 2016

Special Weather Statement, NWS Milwaukee, WI

September 21, 2016Columbia County, Wisconsin

NWS Milwaukee, WI issued this special weather statement at Sep 21, 2016, 6:40 PM CDT for Columbia County, Wisconsin. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 21, 2016, 6:40 PM CDT (23:40 UTC)
Expired
Sep 21, 2016, 7:30 PM CDT
In force
50 min
Issued by
NWS Milwaukee, WI

County Columbia County, WI

The radar

The Milwaukee radar (KMKX), 71 km from the middle of the area, began a volume at 23:41 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

Davenport, (KDVN), launched 12:00Z, 11.7 hours before the alert went out and 221 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, Davenport, at 12:00Z on 2016-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3354 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2016-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 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
3354 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 21, 3:17 PM CDT, 3 hours 23 minutes earlier.

Area forecast discussion, Sep 21, 3:17 PM CDT, 3 hours 23 minutes before
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Hazardous weather outlook, Sep 21, 3:24 PM CDT, 3 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
324 PM CDT WED SEP 21 2016

WIZ046-047-051-052-056>060-062>072-222030-
MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE-
WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE-
LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA-
324 PM CDT WED SEP 21 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN.

.DAY ONE...TONIGHT

MORE SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED. A
FLASH FLOOD WATCH HAS BEEN POSTED MAINLY NORTH OF A LINE
STRETCHING FROM SHEBOYGAN TO JUNEAU TO MADISON TO MINERAL POINT
THROUGH THURSDAY. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES
WILL BE COMMON WITH LOCALLY 3 TO 4 INCHES POSSIBLE.

THERE IS A MARGINAL RISK FOR SEVERE THUNDERSTORMS WEST OF A
FOND DU LAC TO LAKE GENEVA LINE. THE PRIMARY THREAT IS LARGE HAIL
AND DAMAGING WIND.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY

MORE SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED
INTO THURSDAY EVENING...MAINLY FOR THE SAME AREA HIGHLIGHTED FOR
TODAY AND TONIGHT. THE FLASH FLOOD WATCH CONTINUES THROUGH 7 PM
THURSDAY.

CHANCES OF THUNDERSTORMS ARE FORECAST AGAIN FOR SUNDAY AND INTO
EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING. ANY RAINFALL
REPORTS OF SIGNIFICANT ACCUMULATION ARE APPRECIATED.

LMZ643>646-222030-
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-
324 PM CDT WED SEP 21 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN.

.DAY ONE...TONIGHT

THUNDERSTORMS ARE LIKELY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH WEDNESDAY

NORTHEAST WINDS AND WAVES MAY APPROACH SMALL CRAFT ADVISORY LEVELS
THURSDAY NIGHT AND FRIDAY.

THE CHANCE FOR THUNDERSTORMS WILL CONTINUE THROUGH THURSDAY
NIGHT...THEN AGAIN SUNDAY INTO EARLY NEXT WEEK.

HENTZ

WWW.WEATHER.GOV/MKX

In the hours before

Special weather statement, Sep 21, 4:00 PM CDT, 2 hours 40 minutes before
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Local storm report, Sep 21, 5:03 PM CDT, 1 hour 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
503 PM CDT WED SEP 21 2016

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

0440 PM     HEAVY RAIN       MADISON                 43.08N 89.38W
09/21/2016  U0.00 INCH       DANE               WI   PUBLIC

            STREET FLOODING ALONG NORTHPORT DRIVE. RELAYED VIA
            TWITTER.

&&

JTS
Special weather statement, Sep 21, 5:08 PM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
508 PM CDT WED SEP 21 2016

WIZ057-058-063-064-069-070-212300-
JEFFERSON-ROCK-COLUMBIA-DODGE-DANE-WALWORTH-
508 PM CDT WED SEP 21 2016

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
COLUMBIA...WESTERN JEFFERSON...SOUTHWESTERN DODGE AND EASTERN DANE
COUNTIES...

AT 507 PM CDT...STRONG THUNDERSTORMS WERE CLUSTERED NEAR SUN
PRAIRIE... MOVING EAST AT 25 MPH.

NICKEL SIZE HAIL IS POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
EASTERN MADISON...SUN PRAIRIE...STOUGHTON...FORT ATKINSON...
JEFFERSON...MCFARLAND...MONONA...WINDSOR...LAKE MILLS...EDGERTON...
COLUMBUS...MARSHALL...WATERLOO...DEFOREST...COTTAGE GROVE...
DEERFIELD...CAMBRIDGE...LAKE KOSHKONONG...LAKE RIPLEY AND ALBION.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THISE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4285 8931 4334 8939 4338 8884 4284 8877
TIME...MOT...LOC 2207Z 268DEG 24KT 4322 8919

MRC
Local storm report, Sep 21, 5:37 PM CDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
537 PM CDT WED SEP 21 2016

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

0507 PM     HAIL             DE FOREST               43.25N 89.35W
09/21/2016  E0.75 INCH       DANE               WI   BROADCAST MEDIA

            TIME ESTIMATED FROM RADAR. RELAYED VIA TWITTER.

0510 PM     HAIL             DE FOREST               43.25N 89.35W
09/21/2016  E1.00 INCH       DANE               WI   PUBLIC

            RELAYED VIA TWITTER.

&&

JTS
Local storm report, Sep 21, 5:42 PM CDT, 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
542 PM CDT WED SEP 21 2016

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

0507 PM     HAIL             DE FOREST               43.25N 89.35W
09/21/2016  E0.88 INCH       DANE               WI   TRAINED SPOTTER

            RELAYED VIA FACEBOOK.

&&

JTS
Special weather statement, Sep 21, 6:40 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
640 PM CDT WED SEP 21 2016

WIZ056>058-063>065-220030-
JEFFERSON-WAUKESHA-SAUK-COLUMBIA-DODGE-DANE-
640 PM CDT WED SEP 21 2016

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN SAUK...
COLUMBIA...NORTHERN JEFFERSON...SOUTHWESTERN DODGE AND NORTHEASTERN
DANE COUNTIES...

AT 638 PM CDT...STRONG THUNDERSTORMS WERE CLUSTERED NEAR
POYNETTE...OR 7 MILES EAST OF LAKE WISCONSIN...MOVING EAST AT 25 MPH.

DIME SIZE HAIL IS POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
WATERTOWN...BARABOO...PORTAGE...COLUMBUS...WATERLOO...
WISCONSIN DELLS...LAKE WISCONSIN...LODI...LAKE DELTON...POYNETTE...
PARDEEVILLE...FALL RIVER...RIO...CAMBRIA...LEBANON...
ARLINGTON AND WYOCENA.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4335 8965 4364 8985 4363 8917 4322 8853
      4304 8851
TIME...MOT...LOC 2338Z 264DEG 23KT 4338 8942

MRC

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 9:16 PM CDTRiver Flood WatchMKXSauk5 days
Sep 20, 9:16 PM CDTRiver Flood WatchMKXColumbia, Sauk6 days
Sep 21, 2:53 AM CDTFlash Flood WatchMKXColumbia, Dane, Dodge, Fond du Lac, Green Lake, Iowa and 3 more48 hr
Sep 21, 3:10 AM CDTSpecial Weather StatementMKXSauk50 min
Sep 21, 3:18 AM CDTSpecial Weather StatementMKXGreen Lake, Marquette57 min
Sep 21, 3:56 AM CDTSpecial Weather StatementMKXColumbia, Dodge64 min
Sep 21, 4:47 AM CDTSpecial Weather StatementMKXDane, Jefferson, Rock43 min
Sep 21, 4:48 AM CDTSpecial Weather StatementMKXDane, Jefferson, Rock42 min
Sep 21, 4:50 AM CDTSpecial Weather StatementMKXFond du Lac, Sheboygan40 min
Sep 21, 4:53 AM CDTSpecial Marine WarningMKX97 min
Sep 21, 5:05 AM CDTSpecial Weather StatementMKXMilwaukee, Ozaukee, Washington, Waukesha40 min
Sep 21, 5:20 AM CDTSpecial Marine WarningMKX85 min
Sep 21, 5:36 AM CDTSpecial Weather StatementMKXKenosha, Racine, Walworth54 min
Sep 21, 8:29 AM CDTSpecial Weather StatementMKXLafayette46 min
Sep 21, 10:02 AM CDTSpecial Weather StatementMKXIowa28 min
Sep 21, 11:29 AM CDTAreal Flood AdvisoryMKXIowa2 hr
Sep 21, 12:06 PM CDTAreal Flood AdvisoryMKXSauk114 min
Sep 21, 12:32 PM CDTSpecial Weather StatementMKXSauk43 min
Sep 21, 2:55 PM CDTSpecial Weather StatementMKXColumbia35 min
Sep 21, 4:00 PM CDTSpecial Weather StatementMKXDane30 min
Sep 21, 4:26 PM CDTAreal Flood AdvisoryMKXDane2 hr
Sep 21, 5:08 PM CDTSpecial Weather StatementMKXJefferson52 min
Sep 21, 5:45 PM CDTAreal Flood AdvisoryMKXColumbia, Sauk2 hr

Nearby

Special Weather Statements in Wisconsin, 2016Every special weather statement in 2016

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.