Alert archive / Wisconsin / Special Weather Statements in 2010

Special Weather Statement, NWS Twin Cities, MN

August 31, 2010Pierce County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Aug 31, 2010, 5:59 PM CDT for Pierce County, Wisconsin. It was in force for 46 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: Aug 31, 2010, 5:59 PM CDT (22:59 UTC)
Expired: Aug 31, 2010, 6:45 PM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN

County Pierce County, WI

The radar

The La Crosse radar (KARX), 112 km from the middle of the area, began a volume at 23:02 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 12:00Z, 11.0 hours before the alert went out and 120 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: 33 J/kg
Mixed-layer CIN: -391 J/kg
Mixed-layer LCL: 1358 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 31, 1:47 PM CDT, 4 hours 12 minutes earlier.

Area forecast discussion, Aug 31, 1:47 PM CDT, 4 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
147 PM CDT TUE AUG 31 2010

.DISCUSSION...

A VERY PROGRESSIVE WEATHER PATTERN DEVELOPING ACROSS THE UPPER
MIDWEST FOR THE NEXT SEVERAL DAYS AND A SERIES OF DISTURBANCES
INTERACT WITH A STRENGTHENING UPPER LEVEL JET STRUCTURE.

IN THE SHORT TERM...COLD FRONT IS NEAR THE FAR WESTERN SUBURBS OF
THE TWIN CITIES EARLY THIS AFTN...WITH CAPES NEAR 1500 J/KG ALONG
AND AHEAD OF THIS FRONT. THERE WILL BE A SMALL OPPORTUNITY OF SVR
WX THIS AFTN...FOR MAINLY THE FAR SE FA...OR JUST AHEAD OF THIS
COLD FRONT. UPPER LEVEL ENERGY IS CONDUCIVE FOR A FEW SVR STORM
BASED ON SHEAR PARAMETERS. SEE SPC FOR ADDITIONAL INFORMATION.

ONCE THE COLD FRONT MOVES THROUGH...STRONG NVA WITH DEVELOP.
HOWEVER...THIS WILL BE VERY SHORT LIVED AS THE NEXT SYSTEM WILL
BEGIN TO CARVE OUT A VERY VIGOROUS UPPER WAVE ACROSS THE DAKOTAS
LATE TOMORROW AFTN. THIS WILL SET THE STAGE FOR THE OLD FRONTAL
BOUNDARY TO MOVE BACK AS A WARM FRONT...ALONG WITH AN INCREASING
LLJ AND MOISTURE ADVECTION. THIS WILL INDUCE A WIDE AREA OF SHRA
AND EMBEDDED TSRA ACROSS THE SE CWA BY LATE WEDNESDAY
AFTN/EVENING...AND MOVE NORTHEAST DURING THE OVERNIGHT HRS.

THIS WAVE HAS A VERY STRONG PVA ANOMALY WHICH WAS PREVIOUSLY
STATED IN EARLY AFD'S. MODELS CONTINUE TO DEEPEN THIS SYSTEM
THROUGH THURSDAY AFTN WITH LOW PRESSURE RAPIDLY INTENSIFIES ACROSS
THE NORTHERN GREAT LAKES REGION. THIS SHOULD ALLOW FOR A GREATER
FETCH OF MOISTURE TO WRAP AROUND THIS SYSTEM AND DEVELOP
INSTABILITY SHRA THURSDAY...AND ESPECIALLY THURSDAY AFTN. AN
ISOLATED TSRA/SMALL HAILERS ARE ALSO POSSIBLE DUE TO THE STEEP
LAPSE RATES DEVELOPING.

IN THE WAKE OF THIS SYSTEM...STRONG W/NW FLOW /CAA/ WILL COMMENCE
WITH LEFT OVER MOISTURE FOR THE EASTERN CWA ON FRIDAY.

THERE SHOULD BE A PERIOD OF SUNNY SKIES AND NEAR NORMAL
TEMPERATURES THIS WEEKEND BEFORE THE NEXT SYSTEM BEGINS TO AFFECT
THE UPPER MIDWEST EARLY NEXT WEEK. TIMING AND STRENGTH OF NEXT
WEEK SYSTEM IS HIGHLY VARIABLE AT THIS TIME DUE TO MODEL
INCONSISTENCIES AND THE VERY FAST PROGRESSIVE FLOW PROGGED.

&&

.AVIATION.../18Z TAF ISSUANCE/

SFC CDFNT HA BEEN MVG EWRD BIT FASTER THAN EARLIER XPCTD.  WND SHIFT
TO WNW NOW FM NR STC-LJF-ULM.  LOOP OF MPX RADAR SHWS THIS SHIFT
QUITE WELL.  BAND OF FAIRLY SOLID MVFR CIGS HAS BEEN FOLLOWING THIS
WND SHIFT WELL.  AHD OF FNT STILL CONSIDERABLE MVFR CIGS ACRS IA
INTO SE MN AND WC WI. BASES WILL CONT TO LIFT DRNG AFTN...BUT ENUF
CLOUDS MAY RMN TO SUPPRESS CONVCTN SMWT.  SHUD STILL SEE SM SHRWS
AND FEW TSTMS DRNG AFTN...MAINLY MSP AND WI TAF SITES. RADAR SHWS WK
ELEVATED RETURNS IN SW MN THEN INTO NW IA AHD OF UPR TROF. HRRR
SEEMS TO HV A GOOD HANDLE THIS SPRDG PCPN NE DRNG AFTN.

KMSP...SFC WNDS WL TRND MR SW NEXT CUPL HRS...AND THEN WNW ARND 22Z.
MOIST AMS AHD OF FNT HAS BEEN DVLPG SCT/BKN025...BUT XPCT CIGS ARND
3K BY THE TIME THEN REACH MSP. SHWRS TRYING TO DVLP IN SW MN AHD OF
UPR TROF. PUT TEMPO TSTM 21-23Z.  OTHW VFR OVRNITE WITH SFC WNDS
TURN NE BY MRNG AS HI PRES BLDS INTO AREA.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
MN...NONE.
WI...NONE.
&&

JLT/BAP

Hazardous weather outlook, Aug 31, 4:51 PM CDT, 1 hour 8 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
451 PM CDT TUE AUG 31 2010

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
011100-
DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS-
BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA-
KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON-
YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA-
REDWOOD-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-BLUE EARTH-
WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-POLK-BARRON-RUSK-
ST. CROIX-PIERCE-DUNN-PEPIN-EAU CLAIRE-
451 PM CDT TUE AUG 31 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
SOUTHERN MINNESOTA...AND WEST CENTRAL WISCONSIN.

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH THIS EVENING
FOR SOUTH CENTRAL AND SOUTHEAST MINNESOTA AND WEST CENTRAL
WISCONSIN. DAMAGING WIND IS THE MOST LIKELY SEVERE WEATHER THREAT.
THERE WILL ALSO BE TORRENTIAL DOWNPOURS WITH THE STORMS WHICH MAY
LEAD TO THE PONDING OF WATER IN LOW AREAS AND ON AREA HIGHWAYS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A SLIGHT RISK FOR SEVERE THUNDERSTORMS WILL EXIST AGAIN WEDNESDAY
NIGHT FOR PORTIONS OF WEST CENTRAL AND SOUTH CENTRAL MINNESOTA AS
A STRONG LOW PRESSURE TROUGH MOVES ACROSS THE PLAINS.
THUNDERSTORM CHANCES WILL CONTINUE THROUGH THURSDAY ACROSS THE
REMAINDER OF THE OUTLOOK AREA...THOUGH CHANCES FOR MORE ORGANIZED
SEVERE WEATHER BEYOND WEDNESDAY NIGHT IS LOW AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THROUGH EARLY EVENING.

In the hours before

Special weather statement, Aug 31, 3:30 PM CDT, 2 hours 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
330 PM CDT TUE AUG 31 2010

MNZ083>085-091>093-312145-
BLUE EARTH-FARIBAULT-FREEBORN-MARTIN-STEELE-WASECA-
330 PM CDT TUE AUG 31 2010

...THUNDERSTORMS MOVING INTO BLUE EARTH...FARIBAULT...FREEBORN...
EASTERN MARTIN...STEELE AND WASECA COUNTIES THROUGH 445 PM CDT...

AT 326 PM CDT...WEATHER SERVICE RADAR WAS TRACKING STRENGTHENING
THUNDERSTORMS ALONG A LINE EXTENDING FROM ESTHERVILLE TO KIESTER.
THESE STORMS WERE MOVING NORTHEAST AT 30 MPH.

PEA SIZE HAIL AND WINDS UP TO 45 MPH ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  CEYLON.
  WILBERT.
  EMMONS.
  FAIRMONT.
  FROST.
  GLENVILLE.
  ALBERT LEA.
  BLUE EARTH.
  GOOD THUNDER.
  CLARKS GROVE.
  WASECA.
  OWATONNA.
  INTERSTATES 90 AND 35.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

RAINFALL AMOUNTS OF ONE INCH PER HOUR OR GREATER ARE POSSIBLE UNDER
SOME OF THESE THUNDERSTORMS. THIS MAY RESULT IN BRIEF RUNOFF
PROBLEMS AND PONDING OF WATER ON AREA ROADWAYS.

&&

LAT...LON 4350 9477 4408 9414 4419 9415 4416 9404
      4419 9400 4422 9402 4424 9401 4424 9378
      4420 9377 4419 9304 4349 9306
TIME...MOT...LOC 2026Z 237DEG 25KT 4332 9481 4337 9390

Special weather statement, Aug 31, 4:49 PM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
449 PM CDT TUE AUG 31 2010

MNZ092-093-312245-
FARIBAULT-FREEBORN-
449 PM CDT TUE AUG 31 2010

...THUNDERSTORMS MOVING INTO/DEVELOPING OVER FARIBAULT AND FREEBORN
COUNTIES THROUGH 545 PM CDT...

AT 449 PM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM BLUE EARTH MINNESOTA TO
LAKE MILLS IOWA. THESE STORMS WERE MOVING EAST AT 35 MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...AND VERY HEAVY DOWNPOURS ARE
EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  HUNTLEY.
  WINNEBAGO.
  KIESTER.
  DELAVAN.
  EMMONS.
  EASTON.
  MINNESOTA LAKE.
  GLENVILLE.
  ALBERT LEA.
  INTERSTATES 35 AND 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

&&

LAT...LON 4350 9425 4351 9424 4385 9425 4385 9305
      4350 9305 4349 9306 4349 9424
TIME...MOT...LOC 2149Z 255DEG 29KT 4367 9419 4340 9360

Special weather statement, Aug 31, 5:32 PM CDT, 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
532 PM CDT TUE AUG 31 2010

MNZ078-312315-
GOODHUE-
532 PM CDT TUE AUG 31 2010

...THUNDERSTORMS MOVING OVER GOODHUE COUNTY THROUGH 615 PM CDT...

AT 529 PM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM HAGER CITY TO 3 MILES SOUTH
OF KENYON. THESE STORMS WERE MOVING SOUTHEAST AT 15 MPH.

WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  HADER.
  WANAMINGO.
  GOODHUE.
  ZUMBROTA.
  FRONTENAC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREES...TREE
LIMBS...AND POWERLINES. SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED.

&&

LAT...LON 4420 9304 4424 9304 4440 9293 4461 9261
      4457 9250 4456 9234 4446 9225 4445 9226
      4445 9241 4436 9244 4436 9254 4420 9254
      4419 9256
TIME...MOT...LOC 2232Z 284DEG 12KT 4456 9251 4422 9298

Local storm report, Aug 31, 5:55 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
555 PM CDT TUE AUG 31 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     2 N ALBERT LEA          43.68N 93.37W
08/31/2010                   FREEBORN           MN   LAW ENFORCEMENT

            TREES AND POWER LINES WERE BLOWN DOWN ON THE NORTHSIDE OF
            ALBERT LEA. THE LOCAL AWOS AIRPORT MEASURED A WIND GUST
            OF 59 MPH AT THIS TIME.

&&

JLT

Special weather statement, Aug 31, 5:59 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
559 PM CDT TUE AUG 31 2010

WIZ024-026-312345-
PEPIN-PIERCE-
559 PM CDT TUE AUG 31 2010

...THUNDERSTORMS MOVING OVER PEPIN AND SOUTHERN PIERCE COUNTIES
THROUGH 645 PM CDT...

AT 559 PM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM BAY CITY TO 6 MILES
NORTHEAST OF BELLECHESTER. THESE STORMS WERE MOVING EAST AT 25 MPH.

WINDS UP TO 50 MPH AND HEAVY DOWNPOURS ARE EXPECTED WITH THESE
STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  BAY CITY.
  MAIDEN ROCK.
  STOCKHOLM.
  PLUM CITY.
  PORCUPINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREES...TREE
LIMBS...AND POWERLINES. SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED.

&&

LAT...LON 4459 9201 4458 9203 4443 9207 4441 9210
      4444 9224 4456 9234 4457 9249 4468 9246
      4468 9202 4467 9196 4459 9196
TIME...MOT...LOC 2259Z 270DEG 17KT 4459 9241 4442 9239

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 7:52 PM CDT	Special Weather Statement	MPX	Stevens	68 min
Aug 30, 8:26 PM CDT	Special Weather Statement	MPX	Lac qui Parle, Yellow Medicine	94 min
Aug 30, 9:31 PM CDT	Special Weather Statement	MPX	Chippewa, Douglas, Pope, Stevens, Swift	74 min
Aug 30, 10:09 PM CDT	Special Weather Statement	MPX	Kandiyohi, Todd	66 min
Aug 30, 11:11 PM CDT	Special Weather Statement	MPX	Benton, Morrison, Stearns	64 min
Aug 30, 11:54 PM CDT	Special Weather Statement	MPX	Chippewa, Lac qui Parle, Yellow Medicine	51 min
Aug 30, 11:59 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	45 min
Aug 31, 1:24 AM CDT	Special Weather Statement	MPX	Stearns	36 min
Aug 31, 1:34 AM CDT	Special Weather Statement	MPX	Stearns	41 min
Aug 31, 2:34 AM CDT	Special Weather Statement	MPX	Isanti, Sherburne, Wright	41 min
Aug 31, 3:30 PM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Freeborn, Martin, Steele, Waseca	75 min
Aug 31, 4:49 PM CDT	Special Weather Statement	MPX	Faribault, Freeborn	56 min
Aug 31, 4:52 PM CDT	Areal Flood Advisory	MPX	Blue Earth, Faribault, Freeborn, Goodhue, Rice, Steele and 1 more	4 hr
Aug 31, 5:12 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	39 min
Aug 31, 5:32 PM CDT	Special Weather Statement	MPX	Goodhue	43 min
Aug 31, 6:04 PM CDT	Areal Flood Advisory	MPX	Chippewa, Dunn, Eau Claire, Pepin, Pierce, Rusk	3 hr
Aug 31, 6:05 PM CDT	Severe Thunderstorm Warning	MPX	Pepin, Pierce	40 min
Aug 31, 6:45 PM CDT	Special Weather Statement	MPX	Eau Claire, Pepin	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.