Alert archive / Wisconsin / Special Weather Statements in 2018

Special Weather Statement, NWS La Crosse, WI

August 1, 2018Crawford County, Grant County, Richland County, Wisconsin; Clayton County, Iowa

NWS La Crosse, WI issued this special weather statement at Aug 1, 2018, 9:49 PM CDT for Crawford County, Grant County, Richland County, Wisconsin; Clayton County, Iowa. It was in force for 56 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 1, 2018, 9:49 PM CDT (02:49 UTC)
Expired
Aug 1, 2018, 10:45 PM CDT
In force
56 min
Issued by
NWS La Crosse, WI

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

The radar

The La Crosse radar (KARX), 103 km from the middle of the area, began a volume at 02:52 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 00:00Z, 2.8 hours before the alert went out and 150 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 00:00Z on 2018-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 203 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 00:00Z on 2018-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.1939Sfc1 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
203 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1931 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

004 
WWUS83 KARX 020249
SPSARX

Special Weather Statement
National Weather Service La Crosse WI
949 PM CDT WED AUG 1 2018

IAZ030-WIZ054-055-061-020345-
Clayton-Richland-Crawford-Grant-
949 PM CDT WED AUG 1 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN CLAYTON...
GRANT...RICHLAND AND CRAWFORD COUNTIES...

At 948 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Richland Center to near Cassville.
Movement was east at 30 mph.

Wind gusts up to 50 mph and dime size hail are possible with these
storms.

Locations impacted include...
Platteville, Prairie Du Chien, Richland Center, Lancaster,
Guttenberg, Boscobel, Fennimore, Cuba City, and Muscoda.

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

LAT...LON 4264 9071 4268 9090 4265 9090 4264 9143
      4267 9151 4342 9079 4343 9067 4355 9067
      4355 9019 4317 9019 4321 9029 4320 9043
      4251 9043 4251 9064
TIME...MOT...LOC 0248Z 285DEG 26KT 4329 9041 4276 9100 

$$

Rogers

Nearby

Special Weather Statements in Wisconsin, 2018Special Weather Statements in Iowa, 2018Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.