Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS Green Bay, WI

April 19, 2017Marathon County, Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this special weather statement at Apr 19, 2017, 8:50 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 85 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 19, 2017, 8:50 PM CDT (01:50 UTC)
Expired: Apr 19, 2017, 10:15 PM CDT
In force: 85 min
Issued by: NWS Green Bay, WI

Counties Marathon County, WI, Portage County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 137 km from the middle of the area, began a volume at 01:49 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.8 hours before the alert went out and 138 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Green Bay, WI wrote its last area forecast discussion before this special weather statement went out at Apr 19, 4:45 PM CDT, 4 hours 5 minutes earlier.

Area forecast discussion, Apr 19, 4:45 PM CDT, 4 hours 5 minutes before

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Hazardous weather outlook, Apr 19, 3:17 PM CDT, 5 hours 33 minutes before

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In the hours before

Special weather statement, Apr 19, 8:50 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Green Bay WI
850 PM CDT WED APR 19 2017

WIZ030-035-036-045-200315-
Marathon WI-Waushara WI-Wood WI-Portage WI-
850 PM CDT WED APR 19 2017

...THUNDERSTORMS WITH TORRENTIAL RAINFALL APPROACHING CENTRAL
WISCONSIN THIS EVENING...

At 846 PM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from near Fairchild to 8 miles
west of Black River Falls to near Dakota. Movement was east at 35
mph.

A few storms may produce up to one half inch hail and wind gusts to
40 mph.

Locations impacted include...
Wausau, Stevens Point, Wisconsin Rapids, Wautoma, Marshfield, Weston,
Rib Mountain, Mosinee, Abbotsford and Spencer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4503 9031 4503 9020 4512 9020 4509 8924
      4424 8922 4398 8932 4398 8960 4425 8960
      4425 9032
TIME...MOT...LOC 0146Z 257DEG 29KT 4467 9094 4428 9102 4389 9143

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 10:17 AM CDT	River Flood Warning	GRB	Wood	48 hr
Apr 20, 10:17 AM CDT	River Flood Warning	GRB	Marinette	5 days
Apr 20, 12:04 PM CDT	Small Craft Advisory	GRB		22 hr

Nearby

Special Weather Statements in Wisconsin, 2017 Every special weather statement in 2017

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.