Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 56, NWS Twin Cities, MN

July 24, 2009Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 24, 2009, 8:28 AM CDT for Ramsey County, Washington County, Minnesota. It was in force for 32 min. 9 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: Jul 24, 2009, 8:28 AM CDT (13:28 UTC)
Expired: Jul 24, 2009, 9:00 AM CDT
In force: 32 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 60 km from the middle of the area, began a volume at 13:31 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
Jul 24, 8:30 AM CDT	HAIL 1	North St Paul, MN	MINOR DAMAGE TO VEHICLES...LEAVES OFF TREES. AT CENTURY AVE AND 34TH STREET.
Jul 24, 8:32 AM CDT	HAIL 1	2 N Maplewood, MN	HWY 36 AND ENGLISH
Jul 24, 8:32 AM CDT	HAIL 1.75	Maplewood, MN	1/2 MILE SOUTH OF 36 AND MCKNIGHT RD
Jul 24, 8:35 AM CDT	HAIL 0.88	North St Paul, MN	AT THE CORNER OF MARGARET AND 17TH AVE.
Jul 24, 8:36 AM CDT	HAIL 1.25	North St Paul, MN	LEAVES RIPPED FROM TREES
Jul 24, 8:37 AM CDT	HAIL 0.88	Oakdale, MN	REPORTED AT INTERSECTIONS OF HWY 5 AND HELMO...AND HWYS 694 AND 5
Jul 24, 8:37 AM CDT	HAIL 1	Maplewood, MN
Jul 24, 8:45 AM CDT	HAIL 1	Woodbury, MN
Jul 24, 8:47 AM CDT	HAIL 0.88	5 Sse Maplewood, MN

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 6 storm reports to this severe thunderstorm warning; the first came 2 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 1.5 hours before the alert went out and 62 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: 14 J/kg
Mixed-layer CIN: -286 J/kg
Mixed-layer LCL: 1508 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 318 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.

000 
WUUS53 KMPX 241328
SVRMPX
MNC123-163-241400-
/O.NEW.KMPX.SV.W.0056.090724T1328Z-090724T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
828 AM CDT FRI JUL 24 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN AND EASTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 900 AM CDT

* AT 826 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THIS STORM WAS
  LOCATED NEAR NORTH ST PAUL...OR ABOUT 7 MILES NORTHEAST OF ST
  PAUL...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  NORTH ST PAUL...
  ST PAUL...
  MAPLEWOOD...
  OAKDALE...
  LAKE ELMO...
  STILLWATER...
  WOODBURY...
  BAYPORT...
  LAKELAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

&&

LAT...LON 4506 9279 4502 9276 4500 9277 4496 9275
      4492 9275 4490 9277 4483 9276 4480 9277
      4479 9279 4505 9319 4512 9302
TIME...MOT...LOC 1327Z 307DEG 19KT 4502 9300

$$

LS

4 follow-up statements

000 
WWUS53 KMPX 241335
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
835 AM CDT FRI JUL 24 2009

MNC123-163-241400-
/O.CON.KMPX.SV.W.0056.000000T0000Z-090724T1400Z/
WASHINGTON MN-RAMSEY MN-
835 AM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT 
FOR SOUTHERN AND EASTERN RAMSEY AND CENTRAL AND SOUTHERN WASHINGTON 
COUNTIES...

AT 830 AM CDT...QUARTER SIZE HAIL WAS REPORTED IN MAPLEWOOD.

AT 833 AM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THE 
SEVERE STORM WAS LOCATED NEAR OAKDALE...AND MOVING SOUTHEAST AT 20 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...LAKE ELMO...STILLWATER...
WOODBURY...BAYPORT...OAK PARK HEIGHTS...AFTON AND LAKELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4505 9279 4496 9275 4492 9275 4490 9277
      4483 9276 4482 9277 4480 9277 4479 9280
      4501 9313 4511 9297
TIME...MOT...LOC 1333Z 307DEG 19KT 4500 9297

$$

LS

000 
WWUS53 KMPX 241336
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
836 AM CDT FRI JUL 24 2009

MNC123-163-241400-
/O.CON.KMPX.SV.W.0056.000000T0000Z-090724T1400Z/
WASHINGTON MN-RAMSEY MN-
836 AM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT 
FOR SOUTHERN AND EASTERN RAMSEY AND CENTRAL AND SOUTHERN WASHINGTON 
COUNTIES...

AT 832 AM CDT...GOLF BALL SIZE HAIL WAS REPORTED IN MAPLEWOOD.

AT 835 AM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THE 
SEVERE STORM WAS LOCATED NEAR OAKDALE...AND MOVING SOUTHEAST AT 20 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...STILLWATER...OAK PARK
HEIGHTS...WOODBURY...BAYPORT...AFTON AND LAKELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4505 9279 4496 9275 4492 9275 4490 9277
      4483 9276 4482 9277 4480 9277 4479 9280
      4501 9313 4511 9297
TIME...MOT...LOC 1336Z 307DEG 19KT 4499 9294

$$

LS

000 
WWUS53 KMPX 241348
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
848 AM CDT FRI JUL 24 2009

MNC163-241400-
/O.CON.KMPX.SV.W.0056.000000T0000Z-090724T1400Z/
WASHINGTON MN-
848 AM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT 
FOR CENTRAL AND SOUTHERN WASHINGTON COUNTY...

AT 830 AM...QUARTER SIZE HAIL WAS REPORTED IN NORTH ST PAUL.

AT 842 AM CDT...DOPPLER RADAR INDICATED THE SEVERE STORM WAS LOCATED 
4 MILES SOUTHEAST OF LAKE ELMO...AND MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...WOODBURY AND AFTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4505 9279 4499 9276 4496 9277 4492 9275
      4490 9277 4483 9276 4480 9277 4479 9280
      4491 9298 4511 9297
TIME...MOT...LOC 1346Z 310DEG 24KT 4493 9285

$$

LS

000 
WWUS53 KMPX 241353
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
853 AM CDT FRI JUL 24 2009

MNC163-241400-
/O.CON.KMPX.SV.W.0056.000000T0000Z-090724T1400Z/
WASHINGTON MN-
853 AM CDT FRI JUL 24 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT
FOR SOUTHERN WASHINGTON COUNTY...

AT 832 AM CDT...GOLF BALL SIZE HAIL WAS REPORTED IN MAPLEWOOD. 
QUARTER SIZE HAIL WAS ALSO REPORTED IN NORTH ST PAUL AT 830 AM CDT. 

AT 851 AM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE SEVERE STORM WAS LOCATED
NEAR AFTON...OR ABOUT 4 MILES SOUTHWEST OF LAKELAND...AND MOVING
SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE....WOODBURY AND AFTON.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4491 9298 4505 9279 4502 9277 4496 9277
      4492 9275 4490 9277 4483 9276 4480 9278
      4479 9280
TIME...MOT...LOC 1351Z 310DEG 24KT 4491 9282

$$

LS

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 Jul 24, 6:25 AM CDT, 2 hours 3 minutes earlier.

Area forecast discussion, Jul 24, 6:25 AM CDT, 2 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
625 AM CDT FRI JUL 24 2009

.AVIATION... /12Z TAF ISSUANCE/

COLD FRONT EARLY THIS MORNING ACROSS WEST CENTRAL MN AND ABOUT TO
MOVE THROUGH KAXN. SHOWERS AND ISOLATED THUNDERSTORMS ARE WELL
AHEAD OF THE FRONT ATTM AND IN THE ZONE OF BEST LOW LEVEL WAA.
INDICATED SHOWERS FOR THE MORNING FOR SITES AHEAD OF THE FRONT
WITH 2 HOURS OF TEMPO THUNDER FOR KMSP AND KRNH. VCTS MENTIONED AT
KEAU EARLY THIS AFTERNOON WHERE A DECENT CHANCE EXISTS FOR A LINE
OF STRONG TO SEVERE STORMS DEVELOPING AHEAD OF THE FRONT. KEPT
PREDOMINATE CEILINGS AND VISIBILITIES VFR THROUGH THE PERIOD WITH
MVFR VISIBILITY IN THE TEMPO GROUPS. SURFACE WINDS INCREASING OUT
OF THE NW TODAY AFTER FROPA. MIXING THIS AFTERNOON INDICATES GUSTS
WELL INTO THE 20 KNOT RANGE FOR KAXN...WITH AROUND 20 FOR KSTC AND
KRWF. EASTERN SITES WILL SEE WINDS BY LATE IN THE AFTERNOON IN THE
14 TO 16 KNOT RANGE THAT WILL PERSIST THROUGH THE EVENING BEFORE
DROPPING.

&&

.DISCUSSION... /ISSUED 323 AM CDT FRI JUL 24 2009/

TIGHT WARM ADVECTION ZONE OVER CENTRAL MN AHEAD OF SURFACE LOW
WITH CONVECTION RIDING JUST NORTH OF THE MORE STABLE AIR OVER
SOUTHERN MN. SOME ELEMENTS DEVELOPING BASK TO THE SW OVER WEST
CENTRAL MN CLOSER TO MORE UNSTABLE REGIME OVER SD. RUC13 TAKES
MOST OF LAYER 850-700 WARM ADVECTION ACROSS THE NORTHERN CWA THIS
MORNING BUT THERE ARE HINTS OF AN ADDITIONAL ADVECTION ZONE
DEVELOPING OVER SW MN AS THE FRONT SAG INTO THAT AREA.
DIFFERENTIAL DIV QUIETS STRONG OVER CENTRAL MN AS WELL..BUT THIS
WEAKENS WITH TIME THIS MORNING INTO SOUTHERN MN. WILL PLACE SOME
HIGH POPS FOR A FEW HOURS MAINLY OVER PARTS OF EAST CENTRAL AND
SE MN INTO WEST CENTRAL WI. SOMEWHAT NORTH-SOUTH THICKNESS
ORIENTATION NOT THE BEST FOR SEVERE WEATHER THIS MORNING OVER THE
AREA...BUT BECOMES A LITTLE BETTER OVER SOUTHEAST MINNESOTA THIS
AFTERNOON...WITH A WNW ORIENTATION. RUC AND NAM A LITTLE FASTER THAN
THE GFS WITH THIS...AND CURRENT TRENDS SUGGEST THAT THIS MAY BE
CORRECT. THUS SEVERE WEATHER THREAT MAY BE JUST SOUTHEAST OF OUR
AREA BY AFTERNOON.

SHOULD BE DECENT CLEARING BEHIND THE SYSTEM NW CWA DURING THE
AFTERNOON AND THE REST OF THE AREA THIS EVENING. MODELS CONTINUE
TREND OF SOMEWHAT UNSTABLE CYCLONIC FLOW INTO THE WEEKEND WITH THE
BEST CHANCE OF SCATTERED SHOWERS EASTERN CWA SATURDAY AFTERNOON
AND THEN PART OF SUNDAY INTO MONDAY. GEFS 500 MB HEIGHT ANOMALY
TRENDS SHOW BELOW NORMAL HEIGHTS THROUGH THE END OF THE MONTH. THE
00Z ECMWF ACTUALLY SHOWING A LITTLE MORE BROAD TROUGH EXTENDING
BACK TO THE NW CONUS BY THE END OF THE RUN. BASICALLY THIS
SUGGESTS THE CONTINUING CHANCE OF PRECIP INTO NEXT WEEK. WAVES
WILL BE HARD TO TIME..THUS ARGUES FOR POPS SOMEWHAT ABOVE THE
CLIMATOLOGY. TEMPS STILL AVERAGING BELOW NORMAL.

&&

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

RAH/JPR

Hazardous weather outlook, Jul 24, 4:25 AM CDT, 4 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
425 AM CDT FRI JUL 24 2009

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
250930-
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-
425 AM CDT FRI JUL 24 2009

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS ARE EXPECTED TO TRACK ACROSS MUCH OF
EAST CENTRAL AND SOUTH MINNESOTA INTO WEST CENTRAL WISCONSIN THIS
MORNING. SOME OF THE STORMS OVER CENTRAL OR SOUTH CENTRAL
MINNESOTA COULD PRODUCE SMALL HAIL AND BRIEF HEAVY RAIN. A COLD
FRONT WILL BE MOVING INTO FAR SOUTHERN MINNESOTA...AND PARTS OF
WEST CENTRAL WISCONSIN THIS AFTERNOON. INSTABILITY WILL BE
INCREASING AHEAD OF THE FRONT AND IT IS POSSIBLE THAT
THUNDERSTORMS COULD BECOME SEVERE IN AN AREA FROM AROUND ALBERT
LEA TO EAU CLAIRE. LARGER HAIL AND DAMAGING WINDS WOULD BE THE
MAIN THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ISOLATED THUNDERSTORMS ARE POSSIBLE OVER PARTS OF EAST CENTRAL
MINNESOTA AND WEST CENTRAL WISCONSIN SATURDAY AND SUNDAY
AFTERNOON...AS WEAK DISTURBANCES MOVE SOUTHEAST OUT OF CANADA. THE
WEATHER PATTERN WILL REMAIN UNSETTLED INTO MUCH OF NEXT WEEK...WITH
A CONTINUING CHANCE OF ISOLATED THUNDERSTORMS. SEVERE WEATHER IS
NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OVER FAR
SOUTHERN MINNESOTA AND PARTS OF WEST CENTRAL WISCONSIN.

In the hours before

Local storm report, Jul 24, 7:34 AM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
734 AM CDT FRI JUL 24 2009

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

0723 AM     HAIL             3 W CEDAR               45.31N 93.37W
07/24/2009  M1.75 INCH       ANOKA              MN   TRAINED SPOTTER

            MEASURED IN OAK GROVE

&&

MKM

Special weather statement, Jul 24, 7:38 AM CDT, 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
738 AM CDT FRI JUL 24 2009

MNZ061>063-241315-
ANOKA-RAMSEY-WASHINGTON-
738 AM CDT FRI JUL 24 2009

AT 738 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM NEAR LINO LAKES. THIS STORM WAS MOVING SOUTHEAST AT 40
MPH.

HAIL UP TO NICKEL SIZE...WINDS UP TO 30 MPH...AND HEAVY DOWNPOURS ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CENTERVILLE.
  HUGO.
  MAHTOMEDI.
  MARINE ON ST CROIX.
  STILLWATER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4522 9276 4500 9282 4520 9334 4536 9322
TIME...MOT...LOC 1238Z 300DEG 34KT 4518 9307

Local storm report, Jul 24, 8:02 AM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
802 AM CDT FRI JUL 24 2009

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

0750 AM     HAIL             1 N CIRCLE PINES        45.15N 93.15W
07/24/2009  M0.88 INCH       ANOKA              MN   TRAINED SPOTTER

&&

MKM

Local storm report, Jul 24, 8:20 AM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
820 AM CDT FRI JUL 24 2009

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

0808 AM     HAIL             1 ESE OSCEOLA           45.31N 92.68W
07/24/2009  M0.75 INCH       POLK               WI   TRAINED SPOTTER

&&

MKM

Special weather statement, Jul 24, 8:20 AM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
820 AM CDT FRI JUL 24 2009

MNZ062-063-WIZ023-241345-
RAMSEY-ST. CROIX-WASHINGTON-
820 AM CDT FRI JUL 24 2009

AT 819 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 3 MILES NORTH OF LAKE ELMO. THIS STORM WAS MOVING
SOUTHEAST AT 25 MPH.

HAIL UP TO NICKEL SIZE AND WINDS UP TO 30 MPH ARE EXPECTED WITH THIS
STORM. HEAVY DOWNPOURS ARE ALSO ANTICIPATED.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  WILLERNIE.
  LAKE ELMO.
  BAYPORT.
  NORTH HUDSON.
  LAKELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4499 9260 4480 9288 4509 9318 4515 9286
TIME...MOT...LOC 1320Z 313DEG 21KT 4503 9290

Special weather statement, Jul 24, 8:21 AM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
821 AM CDT FRI JUL 24 2009

WIZ014-023-241400-
POLK-ST. CROIX-
821 AM CDT FRI JUL 24 2009

AT 819 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 3 MILES NORTH OF STAR PRAIRIE. THIS STORM WAS MOVING
SOUTHEAST AT 30 MPH.

HAIL UP TO NICKEL SIZE...WINDS UP TO 30 MPH...AND HEAVY DOWNPOURS ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  HUNTINGTON.
  STAR PRAIRIE.
  NEW RICHMOND.
  DEER PARK.
  CYLON.
  FOREST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4520 9216 4492 9217 4522 9274 4535 9257
TIME...MOT...LOC 1322Z 304DEG 26KT 4522 9253

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:11 AM CDT	Special Weather Statement	MPX	Todd	49 min
Jul 24, 6:35 AM CDT	Special Weather Statement	MPX	Chisago	40 min
Jul 24, 6:53 AM CDT	Special Weather Statement	MPX	Anoka	52 min
Jul 24, 7:20 AM CDT	Special Weather Statement	MPX	Anoka	25 min
Jul 24, 7:38 AM CDT	Special Weather Statement	MPX	Anoka, Washington	37 min
Jul 24, 7:41 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey, Washington	34 min
Jul 24, 8:20 AM CDT	Special Weather Statement	MPX	Ramsey, Washington	25 min
Jul 24, 9:01 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	29 min
Jul 24, 9:08 AM CDT	Special Weather Statement	MPX	Goodhue	52 min
Jul 24, 9:15 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	60 min
Jul 24, 9:28 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	48 min
Jul 24, 9:31 AM CDT	Special Weather Statement	MPX	Rice	29 min
Jul 24, 9:38 AM CDT	Severe Thunderstorm Warning	MPX	Rice, Steele	32 min
Jul 24, 10:18 AM CDT	Special Weather Statement	MPX	Goodhue	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2009 Every severe thunderstorm warning in 2009

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.