Alert archive / Wisconsin / Special Weather Statements in 2018

Special Weather Statement, NWS Green Bay, WI

August 7, 2018Marathon County, Wisconsin

NWS Green Bay, WI issued this special weather statement at Aug 7, 2018, 3:39 PM CDT for Marathon County, Wisconsin. It was in force for 51 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 7, 2018, 3:39 PM CDT (20:39 UTC)
Expired
Aug 7, 2018, 4:30 PM CDT
In force
51 min
Issued by
NWS Green Bay, WI

County Marathon County, WI

The radar

The La Crosse radar (KARX), 165 km from the middle of the area, began a volume at 20:39 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.7 hours before the alert went out and 174 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, Green Bay/Straub, WI at 12:00Z on 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Green Bay/Straub, WI at 12:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.19395878Sfc1 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
2 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
653 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

095 
WWUS83 KGRB 072039
SPSGRB

Special Weather Statement
National Weather Service Green Bay WI
339 PM CDT TUE AUG 7 2018
 
WIZ018-030-072130-
Marathon WI-Lincoln WI-
339 PM CDT TUE AUG 7 2018

...SPECIAL WEATHER STATEMENT...

At 338 PM CDT, Doppler radar was tracking thunderstorms along a line 
extending from 7 miles south of Rib Lake to 8 miles northwest of 
Greenwood. Movement was east at 20 mph.

Heavy rain and winds up to 30 mph are be possible with these storms.

Locations impacted include...
Abbotsford, Colby, Athens, Unity, Milan, Bill Cross Rapids Wildlife
Area, Otis and Cherokee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4503 9031 4504 9020 4512 9020 4512 9005
      4527 9004 4535 8956 4484 9031
TIME...MOT...LOC 2038Z 262DEG 15KT 4521 9018 4483 9074 

$$

RDM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 4:53 PM CDTSpecial Weather StatementGRBMarathon52 min
Aug 7, 5:34 PM CDTSpecial Weather StatementGRBMarathon41 min
Aug 7, 6:33 PM CDTSpecial Weather StatementGRBMarathon42 min

Nearby

Special Weather Statements in Wisconsin, 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.