Alert archive / Wisconsin / Special Weather Statements in 2015

Special Weather Statement, NWS La Crosse, WI

April 7, 2015Crawford County, Grant County, Richland County, Wisconsin; Allamakee County, Clayton County, Iowa

NWS La Crosse, WI issued this special weather statement at Apr 7, 2015, 6:49 PM CDT for Crawford County, Grant County, Richland County, Wisconsin; Allamakee County, Clayton County, Iowa. It was in force for 86 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
Apr 7, 2015, 6:49 PM CDT (23:49 UTC)
Expired
Apr 7, 2015, 8:15 PM CDT
In force
86 min
Issued by
NWS La Crosse, WI

Counties Allamakee County, IA, Clayton County, IA, Crawford County, WI, Grant County, WI, Richland County, WI

The radar

The La Crosse radar (KARX), 93 km from the middle of the area, began a volume at 23:49 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.8 hours before the alert went out and 303 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, Minneapolis, MN at 12:00Z on 2015-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Minneapolis, MN at 12:00Z on 2015-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
546 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 La Crosse, WI wrote its last area forecast discussion before this special weather statement went out at Apr 7, 6:00 PM CDT, 49 minutes earlier.

Area forecast discussion, Apr 7, 6:00 PM CDT, 49 minutes before
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Hazardous weather outlook, Apr 7, 11:05 AM CDT, 7 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LA CROSSE WI
1105 AM CDT TUE APR 7 2015

IAZ008>010-018-019-MNZ079-086>088-094>096-WIZ032>034-041>044-053-
081100-
MITCHELL-HOWARD-WINNESHIEK-FLOYD-CHICKASAW-WABASHA-DODGE-OLMSTED-
WINONA-MOWER-FILLMORE-HOUSTON-BUFFALO-TREMPEALEAU-JACKSON-
LA CROSSE-MONROE-JUNEAU-ADAMS-VERNON-
1105 AM CDT TUE APR 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
MINNESOTA...NORTHEAST IOWA...AND WEST CENTRAL INTO CENTRAL
WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS
AFTERNOON AND EVENING. THE MAIN THREAT WITH THESE STORMS WILL BE
LIGHTNING AND SMALL HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

ON WEDNESDAY NIGHT AND THURSDAY...THERE WILL BE A CHANCE OF
THUNDERSTORMS. A FEW OF THESE THUNDERSTORMS MAY BE STRONG WITH
GUSTY WINDS AND HAIL.

.SPOTTER INFORMATION STATEMENT...

RAINFALL REPORTS WOULD BE APPRECIATED.

.EMERGENCY MANAGEMENT COORDINATION...

NO WEBINAR IS SCHEDULED.

WIZ017-029-081100-
TAYLOR-CLARK-
1105 AM CDT TUE APR 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NO ACTION NEEDED.

.EMERGENCY MANAGEMENT COORDINATION...

NO WEBINAR IS SCHEDULED.

IAZ011-029-030-WIZ054-055-061-081100-
ALLAMAKEE-FAYETTE-CLAYTON-CRAWFORD-RICHLAND-GRANT-
1105 AM CDT TUE APR 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST IOWA
AND SOUTHWEST WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND
EVENING. THE MAIN THREAT WITH THESE STORMS WILL BE LIGHTNING AND
SMALL HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

ON WEDNESDAY NIGHT AND THURSDAY...THERE WILL BE A CHANCE OF
THUNDERSTORMS. A FEW OF THESE THUNDERSTORMS MAY BECOME SEVERE ON
THURSDAY. THE MAIN THREATS AT THIS TIME APPEAR TO BE LARGE HAIL
AND DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS MAY BE NEEDED THURSDAY AFTERNOON. RAINFALL REPORTS
ARE ALWAYS APPRECIATED.

.EMERGENCY MANAGEMENT COORDINATION...

NO WEBINAR IS SCHEDULED.

BOYNE/RRS

In the hours before

Local storm report, Apr 7, 5:38 PM CDT, 1 hour 11 minutes before
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Local storm report, Apr 7, 5:45 PM CDT, 1 hour 4 minutes before
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Local storm report, Apr 7, 5:48 PM CDT, 1 hour 1 minute before
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Special weather statement, Apr 7, 5:57 PM CDT, 52 minutes before
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Special weather statement, Apr 7, 6:40 PM CDT, 9 minutes before
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Special weather statement, Apr 7, 6:49 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 4:12 PM CDTSpecial Weather StatementARXLa Crosse63 min
Apr 7, 4:40 PM CDTSpecial Weather StatementARXBuffalo, La Crosse50 min
Apr 7, 5:29 PM CDTSpecial Weather StatementARXJackson, Juneau, La Crosse, Monroe, Vernon46 min
Apr 7, 5:57 PM CDTSpecial Weather StatementARXAdams, Juneau, Monroe48 min
Apr 7, 6:40 PM CDTSpecial Weather StatementARXCrawford, Grant, Richland95 min
Apr 7, 2:45 PM CDTSevere Thunderstorm WarningARXMower30 min
Apr 7, 3:15 PM CDTSevere Thunderstorm WarningARXDodge, Mower30 min
Apr 7, 3:19 PM CDTSpecial Weather StatementARXDodge, Fillmore, Olmsted, Wabasha, Winona26 min
Apr 7, 3:52 PM CDTSpecial Weather StatementARXHouston, Wabasha, Winona53 min

Nearby

Special Weather Statements in Wisconsin, 2015Special Weather Statements in Iowa, 2015Every special weather statement in 2015

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.