Alert archive / Wisconsin / Tornado Warnings in 2007

Tornado Warning 2, NWS Green Bay, WI

March 25, 2007Oconto County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Mar 25, 2007, 8:06 PM CDT for Oconto County, Wisconsin. It was in force for 24 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: Mar 25, 2007, 8:06 PM CDT (01:06 UTC)
Expired: Mar 25, 2007, 8:30 PM CDT
In force: 24 min
Issued by: NWS Green Bay, WI
Area: Counties, with a storm outline in the text

County Oconto County, WI

The radar

The Green Bay radar (KGRB), 92 km from the middle of the area, began a volume at 01:07 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 watch it was issued in

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

Issued	Product	Office	Lasted
Mar 25, 5:19 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.1 hours before the alert went out and 94 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: 1047 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1205 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KGRB 260106
TORGRB
WIC083-260130-
/O.NEW.KGRB.TO.W.0002.070326T0106Z-070326T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
806 PM CDT SUN MAR 25 2007

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN OCONTO COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 830 PM CDT

* AT 803 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO 9 MILES WEST OF MOUNTAIN...OR ABOUT
  24 MILES EAST OF ANTIGO...MOVING NORTHEAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  LAKEWOOD AND TOWNSEND BY 815 PM...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE
DESTRUCTIVE HAIL AND WIDESPREAD DAMAGING WINDS.

SEEK SHELTER IMMEDIATELY. MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR. DO NOT RUN OUTSIDE TO FIND THE TORNADO.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4529 8868 4513 8860 4521 8830 4537 8831
      4538 8849

$$

KALLAS

2 follow-up statements

000 
WWUS53 KGRB 260119
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
818 PM CDT SUN MAR 25 2007

WIC083-260130-
/O.CON.KGRB.TO.W.0002.000000T0000Z-070326T0130Z/
OCONTO WI-
818 PM CDT SUN MAR 25 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHERN 
OCONTO COUNTY...

AT 815 PM...DOPPLER RADAR CONTINUED TO INDICATE A TORNADO.  THIS
TORNADO WAS LOCATED NEAR MOUNTAIN...OR ABOUT 30 MILES SOUTHEAST OF
CRANDON...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL OCONTO COUNTY AT 830 PM

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE
HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

LAT...LON 4534 8858 4514 8852 4521 8830 4537 8831
      4538 8849

$$

KALLAS

000 
WWUS53 KGRB 260126
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
826 PM CDT SUN MAR 25 2007

WIC083-260136-
/O.EXP.KGRB.TO.W.0002.000000T0000Z-070326T0130Z/
OCONTO WI-
826 PM CDT SUN MAR 25 2007

...THE TORNADO WARNING FOR NORTHERN OCONTO COUNTY EXPIRES AT 830 PM 
CDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED.

A TORNADO WATCH REMAINS IN EFFECT FOR THE AREA.

LAT...LON 4534 8858 4514 8852 4521 8830 4537 8831
      4538 8849

$$

KALLAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 7:16 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Shawano	29 min
Mar 25, 7:23 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	37 min
Mar 25, 7:43 PM CDT	Tornado Warning	GRB	Langlade, Menominee	32 min
Mar 25, 7:54 PM CDT	Severe Thunderstorm Warning	GRB	Shawano	36 min
Mar 25, 8:50 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	25 min
Mar 25, 11:44 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	45 min

Nearby

Tornado Warnings in Wisconsin, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.