Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 71, NWS Green Bay, WI

September 7, 2001Brown County, Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Sep 7, 2001, 1:44 PM CDT for Brown County, Manitowoc County, Wisconsin. It was in force for 31 min. 2 reports 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: Sep 7, 2001, 1:44 PM CDT (18:44 UTC)
Expired: Sep 7, 2001, 2:15 PM CDT
In force: 31 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Brown County, WI, Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 32 km from the middle of the area, began a volume at 18:46 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
Sep 7, 1:56 PM CDT	Thunderstorm Wind 50 E	De Pere, WI
Sep 7, 2:15 PM CDT	Thunderstorm Wind 50 E	Green Bay, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 7, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.7 hours before the alert went out and 30 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: 489 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 656 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

897 
WUUS53 KGRB 071846
SVRGRB
WIC009-071-071915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
144 PM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MANITOWOC COUNTY IN WISCONSIN
  BROWN COUNTY IN WISCONSIN

* UNTIL 215 PM CDT

* AT 144 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS WITH 60 MPH WINDS. THE LINE EXTENDED
  FROM 22 MILES WEST OF GREEN BAY TO 29 MILES SOUTHWEST OF DENMARK.
  IT WAS MOVING NORTHEAST AT 50 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THE STORMS INCLUDE...
  HOLLAND BY 145 PM CDT.
  GREENLEAF BY 150 PM CDT.
  ASKEATON BY 150 PM CDT.
  WRIGHTSTOWN BY 150 PM CDT.
  GREEN BAY BY 205 PM CDT.

THESE STORMS COULD DAMAGE WEAK STRUCTURES AND TREES. IF YOU ARE IN
THE PATH OF THESE STORMS...TAKE COVER IN A STURDY BUILDING UNTIL THE
STORMS HAVE PASSED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN GREEN BAY.

$$

APK

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 7:28 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Oneida, Vilas	62 min
Sep 6, 8:16 PM CDT	Tornado Warning	GRB	Oneida	44 min
Sep 6, 9:56 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	34 min
Sep 7, 1:12 PM CDT	Severe Thunderstorm Warning	GRB	Winnebago	33 min
Sep 7, 1:25 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Outagamie	35 min
Sep 7, 2:06 PM CDT	Severe Thunderstorm Warning	GRB	Door, Kewaunee	39 min
Sep 7, 2:10 PM CDT	Severe Thunderstorm Warning	GRB	Brown	50 min
Sep 7, 6:35 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	40 min
Sep 7, 6:55 PM CDT	Severe Thunderstorm Warning	GRB	Wood	65 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2001 Every severe thunderstorm warning in 2001

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.