Alert archive / Wisconsin / Special Weather Statements in 2014

Special Weather Statement, NWS Twin Cities, MN

August 4, 2014Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Aug 4, 2014, 5:36 PM CDT for Eau Claire County, Wisconsin. It was in force for 114 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
Aug 4, 2014, 5:36 PM CDT (22:36 UTC)
Expired
Aug 4, 2014, 7:30 PM CDT
In force
114 min
Issued by
NWS Twin Cities, MN

County Eau Claire County, WI

The radar

The La Crosse radar (KARX), 99 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 178 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 2014-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 767 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, Minneapolis, MN at 12:00Z on 2014-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
767 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1046 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
46 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.

436 
WWUS83 KMPX 042236
SPSMPX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
536 PM CDT MON AUG 4 2014

WIZ028-050030-
EAU CLAIRE-
536 PM CDT MON AUG 4 2014

...URBAN AND SMALL STREAM FLOODING IS LIKELY IN THE AREA...

AT 535 PM CDT...THUNDERSTORMS WITH HEAVY RAINFALL WERE RESULTING IN 
URBAN AND SMALL STREAM FLOODING. RAINFALL AMOUNTS SINCE 430 PM IN 
THE CITY OF EAU CLAIRE...HAVE RANGED FROM ONE TO TWO INCHES. ANOTHER 
ONE INCH OR MORE OF RAINFALL IS POSSIBLE IN EAU CLAIRE AND SURROUND 
COMMUNITIES THROUGH 7 PM. 

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES.

&&

LAT...LON 4460 9165 4485 9165 4486 9092 4461 9092

$$

JLT

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 9:14 PM CDTSpecial Weather StatementMPXRamsey61 min
Aug 3, 10:11 PM CDTSpecial Weather StatementMPXWashington64 min
Aug 3, 10:21 PM CDTSpecial Weather StatementMPXGoodhue54 min
Aug 4, 10:14 AM CDTSpecial Weather StatementMPXMartin46 min
Aug 4, 10:16 AM CDTSpecial Weather StatementMPXMartin44 min
Aug 4, 10:59 AM CDTSpecial Weather StatementMPXFaribault46 min
Aug 4, 4:19 PM CDTSpecial Weather StatementMPXChippewa41 min

Nearby

Special Weather Statements in Wisconsin, 2014Every special weather statement in 2014

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.