Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 49, NWS Green Bay, WI

June 18, 2007Oconto County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 18, 2007, 5:43 PM CDT for Oconto County, Wisconsin. It was in force for 47 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 18, 2007, 5:43 PM CDT (22:43 UTC)
Expired: Jun 18, 2007, 6:30 PM CDT
In force: 47 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), 82 km from the middle of the area, began a volume at 22:45 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
Jun 18, 5:50 PM CDT	TSTM WND DMG	Townsend, WI	TREE DOWN ON POWER LINE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 18, 12:46 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.7 hours before the alert went out and 85 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: 1126 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KGRB 182243
SVRGRB
WIC083-182330-
/O.NEW.KGRB.SV.W.0049.070618T2243Z-070618T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
543 PM CDT MON JUN 18 2007

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN OCONTO COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 630 PM CDT

* AT 541 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 15 MILES NORTHWEST OF
  MOUNTAIN TO 21 MILES SOUTHWEST OF MOUNTAIN TO 23 MILES SOUTHWEST OF
  MOUNTAIN...OR ALONG A LINE EXTENDING FROM 18 MILES SOUTHEAST OF
  CRANDON TO 19 MILES NORTHWEST OF SHAWANO TO 19 MILES SOUTHEAST OF
  ANTIGO...AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MOUNTAIN BY 555 PM...

THE THUNDERSTORM WILL PRODUCE WINDS UP TO 60 MPH. IF OUTDOORS...MOVE
TO A STURDY BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM PASSES.

CAMPERS AND OTHERS OUTDOORS SHOULD SEEK SHELTER IN A STURDY BUILDING
IMMEDIATELY.

LAT...LON 4537 8860 4536 8831 4521 8831 4520 8820
      4512 8820 4511 8813 4506 8813 4502 8846
      4513 8849 4513 8863 4520 8863 4521 8867
      4535 8867

$$

RDM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:14 PM CDT	Severe Thunderstorm Warning	GRB	Door	16 min
Jun 18, 4:41 PM CDT	Severe Thunderstorm Warning	GRB	Marathon	49 min
Jun 18, 4:47 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Langlade	43 min
Jun 18, 5:21 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Shawano	39 min
Jun 18, 5:30 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Langlade	31 min
Jun 18, 5:57 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Shawano	48 min
Jun 18, 6:14 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	46 min
Jun 18, 6:26 PM CDT	Severe Thunderstorm Warning	GRB	Oconto	49 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2007 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.