Alert archive / Minnesota / Special Weather Statements in 2010

Special Weather Statement, NWS Twin Cities, MN

June 1, 2010Le Sueur County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jun 1, 2010, 1:01 PM CDT for Le Sueur County, Nicollet County, Minnesota. It was in force for 44 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
Jun 1, 2010, 1:01 PM CDT (18:01 UTC)
Expired
Jun 1, 2010, 1:45 PM CDT
In force
44 min
Issued by
NWS Twin Cities, MN

Counties Le Sueur County, MN, Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 61 km from the middle of the area, began a volume at 18:03 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, 6.0 hours before the alert went out and 60 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2010-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2010-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2002 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
174 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 Jun 1, 6:23 AM CDT, 6 hours 38 minutes earlier.

Area forecast discussion, Jun 1, 6:23 AM CDT, 6 hours 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
623 AM CDT TUE JUN 1 2010

.UPDATE...

ADDED 12Z TAF DISCUSSION BELOW.

&&

.DISCUSSION...

THE DETAILS OF THE ACTIVE PERIOD AHEAD ARE BECOMING MORE CLEAR EARLY
THIS MORNING BUT THE FORECAST IS DEPENDENT ON MORE SUBTLE FEATURES
SO CONFIDENCE IS NOT AS HIGH AS IT COULD BE...ESPECIALLY LATER IN
THE WEEK. NEAR TERM CONCERN WILL BE SEVERE AND HEAVY RAIN POTENTIAL
AS DISCUSSED BELOW. MOISTURE CHANNEL IMAGERY AND EVENING UA ANALYSIS
SHOWS A MUCH LESS AMPLIFIED PATTERN OF THE CONUS THAN OVER THE LAST
SEVERAL DAYS. HOWEVER...THE FLOW OVER CANADA IS VERY AMPLIFIED WITH
A WELL DEFINED OMEGA BLOCK IN PLACE. THE RIDGE AXIS PORTION OF THE
BLOCK EXTENDS ALONG THE B.C./ALBERTA BORDER AND WELL NORTHWARD INTO
THE ARCTIC. THE CLOSED LOW TO ITS EAST HAS BEEN IN PLACE OVER THE
CANADIAN PRAIRIES FOR THE LAST SEVERAL DAYS. A SHORTWAVE IS VISIBLE
ROUNDING THE BASE OF THIS LOW AND WILL IMPACT OUR WEATHER TODAY.
OTHERWISE...THE FAST WESTERLY AND FAIRLY ZONAL FLOW TO THE SOUTH OF
THE BLOCK WILL CONTINUE THROUGH THE WEEK AND SET THE STAGE FOR
SEVERAL SMALLER SCALE TROUGHS AND RIDGES TO TRAVERSE IT.
OVERALL...MODEL SOLUTIONS HAVE COME INTO BETTER AGREEMENT WITH THE
EVOLUTION OF THE MORE SIGNIFICANT FEATURES INTO THE WEEKEND WITH WET
AND DRY PERIODS BECOMING MORE CLEAR.

SEVERE WEATHER AND HEAVY RAIN THREAT TODAY AND THIS EVENING WILL BE
THE MAIN FOCUS. AFOREMENTIONED SHORTWAVE ROUNDING THE SOUTHERN
PERIPHERY OF THE CLOSED UPPER LOW OVER MANITOBA WILL HELP PUSH A SFC
COOL FRONTAL BOUNDARY SOUTHWARD ACROSS THE CWA TODAY WITH ANOTHER
WAVE CURRENTLY OVER THE WESTERN U.S. CROSSING THE AREA LATER ON
TODAY. WARM AND MOIST ASCENT ACROSS CENTRAL AND NORTHERN MN ALONG
WITH ELEVATED INSTABILITY CONTINUES TO GENERATE SCATTERED SHOWERS
AND THUNDERSTORMS EARLY THIS MORNING. THIS ACTIVITY LOOKS TO
CONTINUE AND WILL BECOME MORE NUMEROUS ACROSS EASTERN SOUTH DAKOTA
AND CENTRAL MN THROUGH THE LATE MORNING HOURS AS THE FRONT PUSHES
SOUTH. INSTABILITY WILL GROW ACROSS SOUTHERN MN INTO EARLY AFTERNOON
WITH MODERATE DEEP LAYER SHEAR ACROSS THE AREA. BETWEEN THE FRONT...
THE ARRIVAL OF THE SHORTWAVE FROM THE WEST...AND THE ARRIVAL OF THE
RIGHT REAR QUADRANT OF A 100 KT UPPER JET...THERE SHOULD BE PLENTY
OF SHRA/TSRA DEVELOPMENT ACROSS THE AREA BY MID AFTERNOON. EXPECT
THAT WESTERN AREAS WILL SEE AN INCREASE IN COVERAGE LATE THIS
MORNING AS THE FRONT SAGS SOUTH WITH AN EXPANSION IN COVERAGE ALONG
THE FRONT ACROSS MUCH OF THE AREA BY MID AFTERNOON AS THE FRONT...THE
UPPER SHORTWAVE...AND THE INCREASING INSTABILITY ALL INTERSECT.
INSTABILITY AND SHEAR PARAMETERS SUPPORT ORGANIZED CLUSTERS OF
STORMS WITH DAMAGING WINDS AND LARGE HAIL BEING THE MAIN SEVERE
THREATS...ESPECIALLY ACROSS THE CENTRAL AND SOUTHERN CWA. HEAVY RAIN
WILL ALSO BE A THREAT WITH PRECIPITABLE WATER VALUES QUICKLY
INCREASING TO AROUND 1.5/1.6 INCHES. STORMS SHOULD TRAIN IN A GENERAL
WEST TO EAST DIRECTION WHICH WILL INCREASE RESIDENCE TIME OVER ANY
GIVEN AREA BUT THE SOUTHWARD PROGRESSION OF THE FRONT SHOULD KEEP
THE SOUTHWARD PROGRESSION OF THE ACTIVITY STEADY. NEVER THE
LESS...HIGH RAINFALL RATES MAY LEAD TO ISOLATED PONDING/FLOODING. 1
HR FLASH FLOOD GUIDANCE VALUES ARE MOSTLY IN THE 3 TO 3.5 INCH RANGE
THOUGH THERE ARE A FEW COUNTIES THAT ARE AROUND 2.5 INCHES SCATTERED
AROUND THE AREA...NAMELY THE LE SUER/RICE/STEELE AREA IN SOUTH CNTRL
MN...WHICH IS WHERE THE BEST CHANCE FOR HEAVY RAIN EXISTS. ACTIVITY
IS EXPECTED TO CONTINUE INTO TONIGHT BEFORE WANING EARLY WEDNESDAY
MORNING.

HIGH PRESSURE WILL BUILD IN DURING THE DAY WEDNESDAY WITH NORTHERLY
SFC FLOW ACROSS THE AREA. ANOTHER SHORTWAVE WILL APPROACH IN THE
CONTINUED WESTERLY UPPER FLOW SO LOW POPS ARE WARRANTED ACROSS THE
SOUTH DESPITE THE PRESENCE OF HIGH PRESSURE. COOLER AIR WILL BE IN
PLACE AS WELL WITH NORTHERN AREAS LIKELY STRUGGLING TO REACH 70 WITH
LOW TO MID 70S SOUTH. THE HIGH WILL SLIDE TO THE EAST INTO THURSDAY
WITH SHORTWAVE RIDGING APPROACHING FROM THE WEST THURSDAY AFTERNOON.
MID LEVEL WARM ADVECTION ALONG WITH A SHORTWAVE WILL CROSS THE AREA
THURSDAY INTO FRIDAY. A SFC LOW WILL BE MOVING ACROSS THE CANADIAN
PRAIRIES AS WELL WITH A COLD FRONT EXTENDING SOUTHWARD WHICH WILL
ALSO CROSS THE AREA. THE GFS IS FASTER WITH THE PROGRESSION OF
FEATURES THAN THE NAM AND ECMWF WHICH IS NOT AN UNREASONABLE
SOLUTION BUT WILL GO AHEAD AND KEEP THE FORECAST FOR THURSDAY DRY
BUT INTRODUCE POPS FROM WEST TO EAST THURSDAY EVENING/NIGHT AS THE
WAA...WAVE...AND FRONT APPROACH. THERE LOOKS TO BE A BRIEF RESPITE
FROM SHRA/TSRA LATER FRIDAY OR FRIDAY NIGHT BUT ANOTHER SYSTEM LOOKS
TO BRING MORE SHRA/TSRA CHANCES SATURDAY INTO SUNDAY. HIGHS FROM
THURSDAY ONWARD WILL GENERALLY BE IN THE 70S.  ..MDB..

&&

.AVIATION.../12Z TAF ISSUANCE/

GENERALLY VFR CIG CONDITIONS EXPECTED ON AVERAGE EXCEPT IN
DEVELOPING SHOWERS AND THUNDERSTORMS FROM KRWF TO KRNH ON TO THE
SOUTH. THERE MAY ALSO BE A PERIOD OF MVFR CIGS FOR A SHORT TIME
BEHIND THE COLD FRONT MAINLY S OF A LINE FROM KRWF TO KMSP TO
KRNH. MID TO HIGH LEVEL CIGS INTO LATE MORNING OR NOON. INCREASING
INSTABILITY ADVECTION AHEAD OF THE SE MVG COLD FRONT WILL THEN CAUSE
SCT SHOWERS TO DEVELOP OVER MN. THE GREATER RISK OF THUNDERSTORMS
WILL BEGIN IN THE 20-21Z TIME FRAME...ESPECIALLY KRWF TO KMSP TO
KRNH. A LESSER CHANCE FOR KSTC. THE THREAT MOVES TO KEAU AFTER
22Z. VSBYS COULD GO DOWN TO 3-4SM IN SHOWERS AND THUNDERSTORMS
WITH JUST ABOVE MVFR CIGS. THE THREAT OF THUNDER WILL DECREASE
AFTER 01Z BUT WITH SHOWERS LINGERING UNTIL 04Z. CLEARING TOWARD
THE END OF THE TAF PERIOD MOST AREAS. WINDS TO REMAIN LIGHT BUT A
FEW SW GUSTS OVER SOUTH CENTRAL MN. WIND TURNING TO NNE BEHIND THE
COLD FRONT.

KMSP....VFR FOR THE ENTIRE PERIOD EXCEPT FOR THE TIME PERIOD OF
GREATEST RISK OF SHOWERS AND THUNDERSTORMS. VSBYS EXPECTED TO DROP
TO MVFR IN SHOWERS...BUT WILL NEED TO WATCH FOR ANY TRAINING OF
CONVECTION WHICH COULD LOWER CIGS TO MVFR. OTHERWISE THERE MAY BE
A BRIEF PERIOD OF MVFR CIGS BEHIND THE FRONT. SSW WIND DIRECTION
A LITTLE PROBLEMATIC FOR THE RUNWAYS AHEAD OF THE FRONT. WIND
SWITCHING TO NNE BEHIND THE COOL FRONT.

&&

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

MDB/JPR
Hazardous weather outlook, Jun 1, 12:40 PM CDT, 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1240 PM CDT TUE JUN 1 2010

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
020915-
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-
1240 PM CDT TUE JUN 1 2010

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

.DAY ONE...TODAY AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS ARE LIKELY FOR MUCH OF THE OUTLOOK
AREA THIS AFTERNOON AND THIS EVENING...ESPECIALLY ACROSS SOUTH
CENTRAL MINNESOTA. THE MAIN SEVERE THREAT WILL BE LARGE HAIL AND
DAMAGING WINDS. HEAVY RAINFALL WILL ALSO BE POSSIBLE WITH ANY
THUNDERSTORM WHICH MAY LEAD TO PONDING OF WATER AND ISOLATED
FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORMS WILL AGAIN BE POSSIBLE FROM THURSDAY NIGHT INTO THE
WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON
AND THIS EVENING ACROSS SOUTH CENTRAL MINNESOTA AND SOUTHERN
PORTIONS OF WEST CENTRAL WISCONSIN.

DRL

In the hours before

Special weather statement, Jun 1, 11:37 AM CDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1137 AM CDT TUE JUN 1 2010

MNZ065-073-011715-
REDWOOD-RENVILLE-
1137 AM CDT TUE JUN 1 2010

AT 1137 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM NEAR DELHI. THIS STORM WAS MOVING EAST AT 30 MPH.

HAIL UP TO DIME SIZE AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  DELHI.
  REDWOOD FALLS.
  BECHYN.
  FRANKLIN.
  BIRD ISLAND.
  FAIRFAX.

LAT...LON 4487 9478 4450 9464 4452 9514 4464 9529
TIME...MOT...LOC 1637Z 253DEG 25KT 4460 9515
Local storm report, Jun 1, 12:11 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1211 PM CDT TUE JUN 01 2010

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

1209 PM     HAIL             5 N MANKATO             44.24N 93.99W
06/01/2010  M0.50 INCH       BLUE EARTH         MN   LAW ENFORCEMENT

&&

LRS
Local storm report, Jun 1, 12:21 PM CDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1221 PM CDT TUE JUN 01 2010

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

1205 PM     HAIL             NICOLLET                44.28N 94.19W
06/01/2010  M0.75 INCH       NICOLLET           MN   TRAINED SPOTTER

&&

LRS
Local storm report, Jun 1, 12:47 PM CDT, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1247 PM CDT TUE JUN 01 2010

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

1204 PM     HAIL             2 NW MANKATO            44.19N 94.02W
06/01/2010  M1.00 INCH       NICOLLET           MN   LAW ENFORCEMENT

&&

LRS
Special weather statement, Jun 1, 12:54 PM CDT, 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1254 PM CDT TUE JUN 1 2010

MNZ091-011845-
MARTIN-
1254 PM CDT TUE JUN 1 2010

AT 1250 PM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 7 MILES SOUTHEAST OF BERGEN. THIS STORM WAS MOVING EAST
AT 25 MPH.

WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  SHERBURN.
  TRIMONT.
  FOXLAKE.
  WELCOME.
  FAIRMONT.
  NORTHROP.

LAT...LON 4363 9487 4382 9487 4382 9486 4385 9427
      4360 9428
TIME...MOT...LOC 1754Z 270DEG 24KT 4373 9485
Special weather statement, Jun 1, 1:01 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
101 PM CDT TUE JUN 1 2010

MNZ075-076-011845-
LE SUEUR-NICOLLET-
101 PM CDT TUE JUN 1 2010

AT 1259 PM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 7 MILES WEST OF NORSELAND. THIS STORM WAS MOVING EAST AT
35 MPH.

HAIL UP TO DIME SIZE AND WINDS UP TO 50 MPH ARE EXPECTED WITH THIS
STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  NORSELAND.
  OTTAWA.
  KASOTA.
  ST THOMAS.
  CLEVELAND.
  LE CENTER
  ST PETER.

LAT...LON 4445 9366 4424 9373 4426 9411 4438 9430
      4446 9424
TIME...MOT...LOC 1801Z 289DEG 30KT 4444 9418

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 11:37 AM CDTSpecial Weather StatementMPXRenville38 min
Jun 1, 11:55 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca35 min
Jun 1, 12:54 PM CDTSpecial Weather StatementMPXMartin51 min
Jun 1, 1:27 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Martin, Watonwan63 min
Jun 1, 1:39 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet, Waseca51 min
Jun 1, 6:22 PM CDTSpecial Weather StatementMPXAnoka, Sherburne53 min
Jun 1, 3:30 PM CDTSpecial Weather StatementMPXEau Claire45 min

Nearby

Special Weather Statements in Minnesota, 2010Every 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.