Alert archive / Wisconsin / Tornado Warnings in 1996

Tornado Warning 2, NWS Green Bay, WI

July 18, 1996Marathon County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 18, 1996, 4:00 PM CDT for Marathon County, Wisconsin. It was in force for 30 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 18, 1996, 4:00 PM CDT (21:00 UTC)
Expired: Jul 18, 1996, 4:30 PM CDT
In force: 30 min
Issued by: NWS Green Bay, WI
Area: Whole counties

County Marathon County, WI

The radar

The Green Bay radar (KGRB), 138 km from the middle of the area, began a volume at 20:59 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.

What was reported inside it

Time	Report	Where	Remark
Jul 18, 4:00 PM CDT	Hail 0.75	Stratford, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.0 hours before the alert went out and 139 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: 74 J/kg
Mixed-layer CIN: -283 J/kg
Mixed-layer LCL: 548 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRB 182059
TORGRB
WIC073-182130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
400 PM CDT THU JUL 18 1996

THE NATIONAL WEATHER SERVICE IN GREEN BAY WI HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 430 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL WISCONSIN

   ...SOUTHERN MARATHON COUNTY
 
AT 400 PM...DOPPLER RADAR SHOWED A DEVELOPING TORNADO NEAR THE TOWN OF
SPENCER IN SOUTHWEST MARATHON COUNTY.  THE SEVERE THUNDERSTORM WAS
MOVING EAST-SOUTHEAST AT 35 MPH AND WILL MOVE IN AND AROUND
ROZELLVILLE...HALDER AND KNOWLTON.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

J K LAST/BRUSKY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 9:35 AM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon	55 min
Jul 18, 3:35 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	55 min
Jul 18, 4:25 PM CDT	Severe Thunderstorm Warning	GRB	Portage	50 min
Jul 18, 4:32 PM CDT	Tornado Warning	GRB	Portage	48 min
Jul 18, 5:06 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	64 min
Jul 18, 5:21 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waupaca	64 min
Jul 18, 5:38 PM CDT	Tornado Warning	GRB	Langlade, Lincoln	47 min
Jul 18, 5:45 PM CDT	Tornado Warning	GRB	Waupaca	45 min
Jul 18, 6:02 PM CDT	Tornado Warning	GRB	Outagamie, Winnebago	48 min
Jul 18, 6:29 PM CDT	Tornado Warning	GRB	Calumet	46 min

Nearby

Tornado Warnings in Wisconsin, 1996 Every tornado warning in 1996 Tornadoes in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.