Alert archive / Minnesota / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 8, NWS Twin Cities, MN

May 23, 20104 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 23, 2010, 2:10 AM CDT for 4 counties in Minnesota. It was in force for 55 min. 2 reports 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: May 23, 2010, 2:10 AM CDT (07:10 UTC)
Expired: May 23, 2010, 3:05 AM CDT
In force: 55 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Douglas County, MN, Pope County, MN, Stearns County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 174 km from the middle of the area, began a volume at 07:11 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
May 23, 2:25 AM CDT	HAIL 1	Glenwood, MN	DIME TO QUARTER SIZE HAIL.
May 23, 2:25 AM CDT	HAIL 1	Glenwood, MN	DIME TO QUARTER SIZE HAIL AT PELICAN LAKE

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 15 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 22, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.2 hours before the alert went out and 172 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: 614 J/kg
Mixed-layer CIN: -475 J/kg
Mixed-layer LCL: 1468 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 421 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

924 
WUUS53 KMPX 230710
SVRMPX
MNC041-121-145-153-230815-
/O.NEW.KMPX.SV.W.0008.100523T0710Z-100523T0815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
210 AM CDT SUN MAY 23 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TODD COUNTY IN CENTRAL MINNESOTA...
  EASTERN DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...
  WESTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  POPE COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 315 AM CDT

* AT 207 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  MILTONA TO 3 MILES SOUTHWEST OF ALEXANDRIA TO 6 MILES SOUTHWEST OF
  FORADA TO 14 MILES SOUTH OF STARBUCK...AND MOVING EAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  GLENWOOD...
  LONG PRAIRIE...
  CARLOS...
  LONG BEACH...
  FORADA...
  ROSE CITY...
  HEWITT...
  BERTHA...
  OSAKIS...
  EAGLE BEND...
  CLOTHO...
  SEDAN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4636 9467 4543 9467 4542 9564 4610 9531
      4611 9516 4636 9514
TIME...MOT...LOC 0709Z 277DEG 27KT 4605 9529 4585 9540
          4575 9545 4542 9560
WIND...HAIL 60MPH 1.00IN

$$

3 follow-up statements

298 
WWUS53 KMPX 230734
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
234 AM CDT SUN MAY 23 2010

MNC041-121-145-153-230815-
/O.CON.KMPX.SV.W.0008.000000T0000Z-100523T0815Z/
TODD MN-DOUGLAS MN-STEARNS MN-POPE MN-
234 AM CDT SUN MAY 23 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
POPE...WESTERN STEARNS...EASTERN DOUGLAS AND TODD COUNTIES UNTIL 315
AM CDT...

AT 230 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM BERTHA TO OSAKIS TO 7 MILES SOUTHEAST OF FORADA
TO SEDAN...MOVING EAST AT 30 MPH.

IN ADDITION...AT 225 AM...QUARTER SIZE HAIL WAS REPORTED IN GLENWOOD 
WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  LONG PRAIRIE...CLOTHO...SEDAN...CLARISSA...BROWERVILLE...LITTLE
  SAUK...PHILBROOK...SAUK CENTRE...BELGRADE...ELROSA...GEORGEVILLE...
  MEIRE GROVE...GREY EAGLE...GREY EALGE...MELROSE...NORTH SHORE...
  PLEASANT BEACH...ST ROSA...NEW MUNICH AND FREEPORT.

LAT...LON 4636 9467 4543 9467 4543 9547 4610 9521
      4611 9516 4636 9514
TIME...MOT...LOC 0732Z 277DEG 27KT 4628 9494 4583 9515
          4573 9520 4554 9530
WIND...HAIL 60MPH 1.00IN

$$

433 
WWUS53 KMPX 230750
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
250 AM CDT SUN MAY 23 2010

MNC041-121-145-230800-
/O.CAN.KMPX.SV.W.0008.000000T0000Z-100523T0815Z/
DOUGLAS MN-STEARNS MN-POPE MN-
250 AM CDT SUN MAY 23 2010

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN POPE...WESTERN STEARNS
AND EASTERN DOUGLAS COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4636 9467 4579 9467 4579 9512 4612 9510
      4636 9497
TIME...MOT...LOC 0750Z 277DEG 27KT 4625 9474 4599 9486
          4582 9493

$$

MNC153-230815-
/O.CON.KMPX.SV.W.0008.000000T0000Z-100523T0815Z/
TODD MN-
250 AM CDT SUN MAY 23 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR TODD COUNTY
UNTIL 315 AM CDT...

AT 248 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM PHILBROOK TO LONG PRAIRIE TO LITTLE SAUK...
MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  PHILBROOK...GREY EAGLE...GREY EALGE...NORTH SHORE AND BURTRUM.

LAT...LON 4636 9467 4579 9467 4579 9512 4612 9510
      4636 9497
TIME...MOT...LOC 0750Z 277DEG 27KT 4625 9474 4599 9486
          4582 9493
WIND...HAIL 60MPH 1.00IN

$$

474 
WWUS53 KMPX 230805
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
305 AM CDT SUN MAY 23 2010

MNC153-230815-
/O.CAN.KMPX.SV.W.0008.000000T0000Z-100523T0815Z/
TODD MN-
305 AM CDT SUN MAY 23 2010

...THE SEVERE THUNDERSTORM WARNING FOR TODD COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4636 9467 4579 9467 4579 9512 4612 9510
      4636 9497
TIME...MOT...LOC 0805Z 277DEG 27KT 4624 9458 4598 9470
          4581 9477

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 23, 1:30 AM CDT, 40 minutes earlier.

Area forecast discussion, May 23, 1:30 AM CDT, 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
130 AM CDT SUN MAY 23 2010

.DISCUSSION...

ONGOING CONVECTION IN THE FAR WESTERN FA IS THE MAIN CONCERN TODAY
AS IF THERE WILL BE ENOUGH ENERGY TO CONTINUE THE CELLS FURTHER
EAST OVERNIGHT...AND INTO THE MORNING HRS. ALSO...HOW WILL THE
FRONTAL BOUNDARY END UP TODAY...AND IF THE CAP WILL BE STRONG
ENOUGH TO KEEP CONVECTION AT BAY.

SEVERE WX IN SD/ND HAS TRANSLATED FURTHER EASTWARD INTO OUR FAR NW
CWA SINCE MIDNIGHT. CURRENT SPC MESOSCALE ANALYSIS INDICATED MUCAPES
AROUND 3000 J/KG AND NO CIN IN THE FAR WEST WHERE MARGINAL WND
GUSTS OF 50 MPH AND HAIL AROUND ONE INCH WAS OBSERVED EARLIER
TONIGHT. ALTHOUGH RUC DOES SHOW AT LEAST SOME MARGINAL SVR THREATS
THROUGH EARLY MORNING...DO NOT EXPECT ANY SUBSTANTIAL FOR CENTRAL
MN UNLESS A COLD POOL DEVELOPS.

CURRENT TRENDS OF THE LATEST RUC INDICATED AT LEAST SOME SCATTERED
TSRA IN CENTRAL MN THIS MORNING...WITH SOME REDEVELOPMENT THIS
AFTN ALONG THE OUTFLOW/FRONTAL BOUNDARY ACROSS THE EASTERN HALF OF
FA. HAVE ALREADY TRENDED A BIT HIGH IN POPS DURING THE AFTN DUE TO
THIS SCENARIO. ONLY PROBLEM IS IF CAP REMAINS STRONG ENOUGH TO
INHIBIT INITIATION. HOWEVER...ONE SIGN THAT IS NOT AS STRONG IS
THE 85H JET WHICH IS SUBSTANTIAL LOWER THAN TONIGHT'S...SO IT WILL
TAKE A BIT MORE FOR CONVECTION TO FIRE. LATER SHIFTS WILL NEED TO
MONITOR FOR THIS SCENARIO.

AFTER SUNDAY...THE FRONTAL BOUNDARY/OUTFLOW WILL SURGE BACK
NORTHWARD AS THE UPPER RIDGE ACROSS THE GREAT LAKES CONTINUES TO
BUILD. THE NEXT CHC OF HIGHER POPS WILL COME LATER MONDAY
NIGHT/TUESDAY AS ANOTHER WAVE OF ENERGY MOVES NORTHEAST ACROSS THE
CENTRAL PLAINS...AND INTO THE UPPER MIDWEST. MODELS HAVE BEEN
TRENDING AT LEAST SOMEWHAT ON THE POSITION OF THIS FRONT...SO CHC
POPS ARE WARRANTED. HAVE NOT LOOKED BEYOND TUESDAY TOO MUCH DUE TO
SVR WX TONIGHT...AND HOW THE UPPER RIDGE CONTINUES TO BUILD ACROSS
THE UPPER MIDWEST...AND INTO THE CENTRAL PLAINS LATER IN THE WEEK.
..JLT..

&&

.AVIATION.../06Z TAF ISSUANCE/

MANY CHALLENGES THIS PERIOD INCLUDING THUNDERSTORM TRENDS THROUGH
EARLY MORNING FOLLOWED BY LOW CEILING POTENTIAL DURING THE MORNING
WITH ANOTHER ROUND OF THUNDERSTORMS POSSIBLE SUNDAY AFTERNOON.
LINE OF THUNDERSTORMS APPROACHING THE WESTERN MN BORDER AT 05Z
WILL CONTINUE AN EASTWARD MARCH FOR THE NEXT FEW HOURS BUT IS
EXPECTED TO DECREASE IN COVERAGE FROM SOUTH TO NORTH AS IT RUNS
INTO A LESS FAVORABLE ENVIRONMENT. KAXN AND KRWF WILL BE AFFECTED
PRIOR TO 8Z WITH GUSTY WINDS AND SMALL HAIL POSSIBLE. CONVECTION
AT KSTC AND KMSP IS A BIT MORE UP IN THE AIR SO HAVE INCLUDED
VCSH AND A CB FOR NOW WITH THE EXPECTATION OF A DECREASE IN
COVERAGE. A FRONTAL BOUNDARY WILL WORK ACROSS WEST CENTRAL MN INTO
THE MORNING THEN BECOME STATIONARY AND ATTEMPT TO WASH OUT
SOMEWHAT. THIS WILL KEEP THE THREAT FOR SCATTERED SHOWERS GOING
ACROSS EAST CENTRAL MN AND FAR WEST CENTRAL WI THROUGH LATE
MORNING AND EARLY AFTERNOON BUT THIS COVERAGE MAY BE SPARSE.
CHANCES FOR REDEVELOPMENT WILL INCREASE BY LATE AFTERNOON FROM
KSTC TO KMSP AND POINTS EAST WHICH WILL LINGER INTO THE EVENING.
CIG/VSBY ARE THE NEXT CHALLENGE. MOISTURE LEVELS HAVE INCREASED
DRAMATICALLY SO SOME HAZE/MIST MAY DEVELOP ALONG WITH MVFR CIGS.
NOT MUCH IN THE WAY OF MVFR CIGS OUT THERE NOW THOUGH. GENERALLY
HAVE LOW CONFIDENCE IN DEVELOPMENT SO MAY HAVE TO BACK OFF ON THE
MVFR LATER ON TONIGHT. SHOULD IT DEVELOP IT WOULD LAST THROUGH
LATE MORNING BEFORE SCATTERING BY EARLY AFTERNOON. SOUTH WINDS
WILL CONTINUE AHEAD OF THE FRONT BUT TURN WEST THEN NORTH BEHIND
IT ACROSS WEST CENTRAL MN THROUGH THE MORNING.

KMSP...MAIN CHALLENGES ARE CIGS/VSBY AND CONVECTIVE CHANCES. LINE
OF CONVECTION OFF TO THE WEST WILL CONTINUE EASTWARD BUT IS
EXPECTED TO BEGIN TO DECREASE IN COVERAGE AND INTENSITY. ASSOCIATED
FRONTAL BOUNDARY WILL CONTINUE EASTWARD ACROSS WEST CNTRL MN
TONIGHT PUSHING SHRA/TSRA EASTWARD BUT COVERAGE BY THE TIME IT
REACHES MSP IS EXPECTED TO BE QUITE SCATTERED. WILL INCLUDE VCSH
FOR NOW BUT WILL HAVE TO WATCH TRENDS. THE FRONTAL BOUNDARY WILL
BECOME STATIONARY OVER THE MSP METRO AREA SUNDAY AFTERNOON SO
SCATTERED -SHRA MAY LINGER INTO EARLY AFTERNOON BUT THE BEST CHANCE
FOR NEW DEVELOPMENT OF SHRA AND TSRA WILL BE DURING THE LATE
AFTERNOON SO WILL RETAIN PROB30 FOR THUNDER. THE FRONT WILL NOT
MOVE MUCH SO ACTIVITY MAY LINGER WELL INTO THE EVENING. WINDS WILL
STAY SOUTH TO SOUTHEAST THROUGH THE DAY THEN POTENTIALLY BECOME
LIGHT AND VARIABLE SUNDAY EVENING WITH THE WEAKENING FRONT STILL
IN THE AREA. MVFR CIGS MAY DEVELOP LATE TONIGHT AND CONTINUE
THROUGH SUNDAY MORNING BUT CONFIDENCE IS NOT ALL THAT GREAT SO
WILL NEED TO WATCH TRENDS FOR ADJUSTMENTS TO THE CIG FORECAST. IF
THEY DO DEVELOP EXPECT VFR CONDS BY EARLY AFTERNOON.  ..MDB..

&&

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

JLT/MDB

Hazardous weather outlook, May 22, 9:35 PM CDT, 4 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
935 PM CDT SAT MAY 22 2010

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
240245-
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-
935 PM CDT SAT MAY 22 2010

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

.DAY ONE...TONIGHT

THIS EVENING AND TONIGHT...A COMPLEX OF THUNDERSTORMS WILL
CONTINUE TO MOVE EASTWARD ACROSS THE EASTERN DAKOTAS TOWARDS
WESTERN MINNESOTA LATE THIS EVENING. THE ACTIVITY IS EXPECTED TO
REACH WEST CENTRAL MINNESOTA AROUND MIDNIGHT OR NOT LONG AFTER. A
FEW OF THE STORMS MAY BE STRONG OR SEVERE EARLY TONIGHT. THE MAIN
HAZARD WILL BE LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

MORE THUNDERSTORMS ARE POSSIBLE SUNDAY THROUGH NEXT THURSDAY. DUE
TO STRONG INSTABILITY SUNDAY AFTERNOON AND EVENING AHEAD OF A
BOUNDARY ACROSS EASTERN MINNESOTA AND WEST CENTRAL
WISCONSIN...SOME SEVERE THUNDERSTORMS ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS NOT ANTICIPATED THIS EVENING OR
TONIGHT.

MDB

In the hours before

Local storm report, May 22, 10:18 PM CDT, 3 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1018 PM CDT SAT MAY 22 2010

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

0920 AM     HAIL             1 ESE OLIVIA            44.77N 94.98W
05/22/2010  E0.75 INCH       RENVILLE           MN   TRAINED SPOTTER

1115 AM     HAIL             1 SSW RICHFIELD         44.86N 93.29W
05/22/2010  M0.75 INCH       HENNEPIN           MN   TRAINED SPOTTER

1115 AM     HAIL             DARWIN                  45.10N 94.40W
05/22/2010  E0.88 INCH       MEEKER             MN   TRAINED SPOTTER

1145 AM     NON-TSTM WND GST 3 SE MORA               45.85N 93.25W
05/22/2010  E55.00 MPH       KANABEC            MN   TRAINED SPOTTER

            SOUTHEAST WINDS ESTIMATED 45 MPH TO 55 MPH...AFTER THE
            RAIN ENDED.

1220 PM     HAIL             ST MICHAEL              45.21N 93.66W
05/22/2010  M0.75 INCH       WRIGHT             MN   TRAINED SPOTTER

0110 PM     TSTM WND DMG     FOREST LAKE             45.28N 92.99W
05/22/2010                   WASHINGTON         MN   PUBLIC

            5 INCH TO 6 INCH DIAMETER TREES BLOWN DOWN.

&&

JLT

Special weather statement, May 23, 12:53 AM CDT, 1 hour 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1253 AM CDT SUN MAY 23 2010

MNZ041-047-048-230630-
DOUGLAS-POPE-STEVENS-
1253 AM CDT SUN MAY 23 2010

...THUNDERSTORMS MOVING INTO OVER DOUGLAS...POPE AND STEVENS
COUNTIES THROUGH 130 AM CDT...

AT 1249 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 5 MILES NORTHWEST OF CLINTON. THIS STORM WAS MOVING
NORTHEAST AT 55 MPH.

ONE HALF INCH DIAMETER HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH
THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CHOKIO.
  DONNELLY.
  MELBY
  MORRIS.
  ALEXANDRIA.
  BRANDON.

LAT...LON 4575 9627 4576 9577 4609 9578 4611 9575
      4611 9517 4574 9516 4556 9514 4542 9514
      4541 9625
TIME...MOT...LOC 0552Z 218DEG 49KT 4555 9646

Special weather statement, May 23, 1:02 AM CDT, 1 hour 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
102 AM CDT SUN MAY 23 2010

MNZ054>056-064-230645-
CHIPPEWA-LAC QUI PARLE-SWIFT-YELLOW MEDICINE-
102 AM CDT SUN MAY 23 2010

...THUNDERSTORMS MOVING INTO CHIPPEWA...LAC QUI PARLE...SWIFT
AND YELLOW MEDICINE COUNTIES THROUGH 145 AM CDT...

AT 1258 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES WEST OF BIG STONE
CITY TO 3 MILES WEST OF REVILLO TO 9 MILES WEST OF LAKE COCHRANE REC
AREA. THESE STORMS WERE MOVING EAST AT 35 MPH.

ONE HALF INCH DIAMETER HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH
THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  NASSAU.
  BELLINGHAM.
  BURR.
  PORTER.
  PROVIDENCE
  MADISON.
  CANBY.
  APPLETON.

LAT...LON 4527 9646 4528 9643 4527 9641 4526 9632
      4520 9617 4520 9612 4540 9613 4540 9585
      4464 9584 4463 9646
TIME...MOT...LOC 0600Z 270DEG 31KT 4528 9660 4502 9661
          4469 9661

Special weather statement, May 23, 1:47 AM CDT, 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
147 AM CDT SUN MAY 23 2010

MNZ041-042-047>049-055-057-230730-
DOUGLAS-KANDIYOHI-POPE-STEARNS-STEVENS-SWIFT-TODD-
147 AM CDT SUN MAY 23 2010

AT 144 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES NORTH OF BRANDON TO
6 MILES NORTHEAST OF CYRUS TO DANVERS. THESE STORMS WERE MOVING EAST
AT 45 MPH.

ONE HALF INCH DIAMETER HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH
THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  FARWELL.
  LEAF VALLEY.
  STARBUCK.
  MILTONA.
  SWIFT FALLS.
  ROSE CITY
  ALEAXANDRIA.
  GLENWOOD.
  BENSON.
  BROOTEN.

LAT...LON 4610 9485 4569 9491 4524 9503 4524 9573
      4568 9575 4610 9569
TIME...MOT...LOC 0646Z 270DEG 40KT 4602 9557 4569 9563
          4530 9576

Local storm report, May 23, 1:57 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
157 AM CDT SUN MAY 23 2010

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

0145 AM     HAIL             APPLETON                45.20N 96.02W
05/23/2010  M0.50 INCH       SWIFT              MN   LAW ENFORCEMENT

&&

JLT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 12:53 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Stevens	37 min
May 23, 1:02 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Yellow Medicine	43 min
May 23, 1:19 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Stevens, Swift	56 min
May 23, 1:47 AM CDT	Special Weather Statement	MPX	Douglas, Pope, Swift, Todd	43 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2010 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.