Alert archive / Wisconsin / Special Weather Statements in 2010

Special Weather Statement, NWS Twin Cities, MN

September 6, 2010Chippewa County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Sep 6, 2010, 8:19 PM CDT for Chippewa County, Wisconsin. It was in force for 41 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: Sep 6, 2010, 8:19 PM CDT (01:19 UTC)
Expired: Sep 6, 2010, 9:00 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN

County Chippewa County, WI

The radar

The La Crosse radar (KARX), 118 km from the middle of the area, began a volume at 01:20 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

Minneapolis, MN (KMPX), launched 00:00Z, 1.3 hours before the alert went out and 182 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: 547 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 478 m²/s²
0-3 km storm-relative helicity: 509 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 10.3

Open this sounding in Storm Lab

The text

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

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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 Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Sep 6, 6:23 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, Sep 6, 6:23 PM CDT, 1 hour 56 minutes before

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Hazardous weather outlook, Sep 6, 1:13 PM CDT, 7 hours 6 minutes before

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In the hours before

Special weather statement, Sep 6, 2:30 PM CDT, 5 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
230 PM CDT MON SEP 6 2010

MNZ041-047-048-054>056-064-062045-
CHIPPEWA-DOUGLAS-LAC QUI PARLE-POPE-STEVENS-SWIFT-YELLOW MEDICINE-
230 PM CDT MON SEP 6 2010

...THUNDERSTORMS MOVING INTO CHIPPEWA...DOUGLAS...LAC
QUI PARLE...POPE...STEVENS...SWIFT AND YELLOW MEDICINE COUNTIES
THROUGH 345 PM CDT...

AT 224 PM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS OVER NORTHEAST SOUTH DAKOTA. THESE THUNDERSTORMS WERE
MOVING NORTHEAST AT 45 MPH.

ONE HALF INCH DIAMETER HAIL AND WINDS UP TO 50 MPH ARE POSSIBLE WITH
THESE STORMS AFTER 3 PM.

PEOPLE IN LAC QUI PARLE...NORTHWESTERN CHIPPEWA...NORTHWESTERN YELLOW
MEDICINE...SOUTHWESTERN DOUGLAS...STEVENS...SWIFT AND WESTERN POPE
COUNTIES...INCLUDING THE CITIES OF BELLINGHAM...MADISON...CHOKIO...
APPLETON...ALBERTA...WATSON AND MILAN...SHOULD MONITOR THE WEATHER
SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO
TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

LAT...LON 4526 9646 4526 9632 4520 9612 4540 9614
      4541 9625 4575 9627 4576 9577 4580 9575
      4505 9534 4468 9646
TIME...MOT...LOC 1927Z 230DEG 41KT 4573 9706 4520 9658
          4478 9650

Special weather statement, Sep 6, 3:46 PM CDT, 4 hours 33 minutes before

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Special weather statement, Sep 6, 5:33 PM CDT, 2 hours 46 minutes before

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Special weather statement, Sep 6, 6:25 PM CDT, 1 hour 54 minutes before

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The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 6, 8:21 PM CDT	Special Weather Statement	MPX	Dunn	39 min
Sep 6, 11:15 PM CDT	Special Weather Statement	MPX	Rusk	30 min

Nearby

Special Weather Statements in Wisconsin, 2010 Every special weather statement in 2010

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.