Storms fade overnight

Update 1:45am:

Storms will move rapidly east and fade overnight. A few storms storms will linger in Wisconsin and southeast Minnesota through 4am.

Update 12:50am

Bow echo passing just south of the metro with damaging winds. See warnings below.

PH

MPX: 5 Sse Cannon Falls [Goodhue Co, MN] mesonet reports TSTM WND GST of M59 MPH at 01:17 AM CDT — measured at mndot sensor at mile post 90 on hwy 52

MPX: Mankato [Blue Earth Co, MN] law enforcement reports TSTM WND DMG at 12:14 AM CDT — several trees down around town

MPX: Madison Lake [Blue Earth Co, MN] law enforcement reports TSTM WND DMG at 12:20 AM CDT — tree down on powerline

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BULLETIN – IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

1258 AM CDT SAT JUL 24 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…

SOUTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA…

WESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA…

EASTERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA…

* UNTIL 200 AM CDT

* AT 1256 AM CDT…RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS…

CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE

STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 12 MILES WEST OF

CASTLE ROCK TO 3 MILES SOUTH OF NORTHFIELD TO 10 MILES SOUTHWEST OF

NERSTRAND…AND MOVING EAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE…

NORTHFIELD…

NERSTRAND…

DENNISON…

KENYON…

STANTON…

CASTLE ROCK…

RANDOLPH…

WASTEDO…

CANNON FALLS…

HADER…

WANAMINGO…

PRECAUTIONARY/PREPAREDNESS ACTIONS…

IF YOU ARE IN THE PATH OF THIS STORM…PREPARE IMMEDIATELY FOR

DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY

STRUCTURE AND STAY AWAY FROM WINDOWS.

Damaging winds are likely with fast moving bow echo in Nothfield, Faribault, and Owatonna.

1248 AM CDT SAT JUL 24 2010

…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN

STEELE…RICE AND SOUTHWESTERN DAKOTA COUNTIES UNTIL 115 AM CDT…

AT 1246 AM CDT…NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF

SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF

60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM

LONSDALE TO FARIBAULT TO DEERFIELD…MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE…

FARIBAULT…OWATONNA…LONSDALE…MEDFORD…WEBSTER…DUNDAS…

RUSKIN…NORTHFIELD…NERSTRAND…CLINTON FALLS…BRIDGEWATER…

MERTON AND MOLAND.

Also, heavy rains will cause localized flooding south of the metro.

FLOOD ADVISORY

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

1249 AM CDT SAT JUL 24 2010

MNC019-037-049-079-085-131-139-143-240900-

/O.NEW.KMPX.FA.Y.0025.100724T0549Z-100724T0900Z/

/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

MCLEOD MN-CARVER MN-DAKOTA MN-SCOTT MN-SIBLEY MN-GOODHUE MN-

LE SUEUR MN-RICE MN-

1249 AM CDT SAT JUL 24 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR…

DAKOTA COUNTY IN EAST CENTRAL MINNESOTA…

EAST CENTRAL MCLEOD COUNTY IN CENTRAL MINNESOTA…

EASTERN SIBLEY COUNTY IN CENTRAL MINNESOTA…

LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA…

RICE COUNTY IN SOUTH CENTRAL MINNESOTA…

SCOTT COUNTY IN EAST CENTRAL MINNESOTA…

SOUTHERN CARVER COUNTY IN EAST CENTRAL MINNESOTA…

WESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA…

* UNTIL 400 AM CDT

* AT 1247 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED

THUNDERSTORMS WITH HEAVY RAINFALL ACROSS THE ADVISORY AREA. RAINFALL

AMOUNTS OF NEAR 2 INCHES IN AN HOUR OR LESS ARE POSSIBLE AS THESE

THUNDERSTORMS MOVE ACROSS THE AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE MINOR FLOODING TO

OCCUR…ESPECIALLY ALONG SMALL STREAMS AND NEAR LOW WATER

CROSSINGS. SOME LOCATIONS THAT WILL EXPERIENCE MINOR FLOODING

INCLUDE…FARIBAULT…APPLE VALLEY…ARLINGTON…BELLE PLAINE…

BURNSVILLE…CANNON FALLS…CARVER…CLEVELAND…COATES…COLOGNE…

CREDIT RIVER…DUNDAS…EAGAN…ELKO…FARMINGTON…GLENCOE…GREEN ISLE…

HADER…HAMBURG…HAMPTON…HELENA…HENDERSON…JORDAN…

KILKENNY…LAKEVILLE…LE CENTER AND LE SUEUR.

Update 12:00am Saturday (Original post 4:30pm Friday)

SPECIAL WEATHER STATEMENT

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

1230 AM CDT SAT JUL 24 2010

MNZ060-067>070-076-240615-

CARVER-DAKOTA-HENNEPIN-LE SUEUR-SCOTT-SIBLEY-

1230 AM CDT SAT JUL 24 2010

…THUNDERSTORMS MOVING INTO CARVER…DAKOTA…HENNEPIN…LE

SUEUR…SCOTT AND SIBLEY COUNTIES THROUGH 115 AM CDT…

AT 1225 AM CDT…WEATHER SERVICE RADAR WAS TRACKING STRONG

THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES WEST OF GREEN ISLE

TO 6 MILES EAST OF LE SUEUR TO ST HENRY. THESE STORMS WERE MOVING

NORTHEAST AT 50 MPH.

WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE…

HAMBURG.

NORWOOD/YOUNG AMERICA.

WACONIA.

VICTORIA.

SHOREWOOD.

MINNETONKA.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

THIS THUNDERSTORM COULD INTENSIFY QUICKLY…SO BE READY TO ACT IF A

WARNING IS ISSUED.

A line of strong to severe storms is rumbling eastward through the southern half of Minnesota overnight. A line of severe storms will pass along the I-35 corridor south of the Twin Cities. Expect large hail and possible damaging winds of 60 mph with this line of storms.

Storm reports:

MPX: Eagle Lake [Blue Earth Co, MN] law enforcement reports TSTM WND DMG at 12:20 AM CDT — large trees down.

A severe T-Storm Watch in in effect south of the metro until 7am.

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In the Twin Cities expect a wave of thunderstorms through 3am. Most of the severe threat looks to stay south of the central metro, but storms will contain frequent lightning, downpours, gusty winds and possibly small hail as they pass through.

From Twin Cities NWS:

SHORT TERM FORECAST

NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN

1150 PM CDT FRI JUL 23 2010

MNZ042>045-049>053-057>063-066-068>070-076>078-084-085-092-093-

240630-

ANOKA-BENTON-CARVER-CHISAGO-DAKOTA-FARIBAULT-FREEBORN-GOODHUE-

HENNEPIN-ISANTI-KANABEC-KANDIYOHI-LE SUEUR-MCLEOD-MEEKER-MILLE LACS-

MORRISON-RAMSEY-RICE-SCOTT-SHERBURNE-STEARNS-STEELE-TODD-WASECA-

WASHINGTON-WRIGHT-

INCLUDING THE CITIES OF…ALBERT LEA…CAMBRIDGE…HUTCHINSON…

MILACA…MINNEAPOLIS…OWATONNA…RED WING…ST CLOUD…ST PAUL…

STILLWATER…WILLMAR

1150 PM CDT FRI JUL 23 2010

.NOW…

AN AREA OF MODERATE TO HEAVY SHOWERS…WITH ISOLATED EMBEDDED

THUNDERSTORMS…WILL CONTINUE TO TREK EAST AT 40 MPH ACROSS

CENTRAL AND SOUTH CENTRAL MINNESOTA…INTO THE MIDNIGHT HOUR.

WIND GUSTS TO 45 MPH…AND TORRENTIAL RAINFALL…WILL BE ENCOUNTERED

WITH THE STRONGEST STORMS. RAINFALL AMOUNTS ON AVERAGE…WILL

RANGE FROM A FEW TENTHS…TO JUST OVER ONE AND ONE QUARTER INCHES

…AS THESE CELLS PASS YOUR LOCATION PRIOR TO 1 AM. MOST OF THE

ACTIVITY WILL END ACROSS CENTRAL…AND SOUTH CENTRAL MINNESOTA BY

4 AM.

-Twin Cities radar loop

-Latest severe weather warnings

PH

As you enjoy a beautifully warm and quiet summer Friday evening, keep an eye out for possible storms in southern Minnesota overnight.

There is a slight risk some of the storms could be severe in southern Minnesota, especially along the I-90 corridor.

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A flash flood watch remains in effect for the I-90 corridor counties of southern Minnesota tonight, and a tornado watch has been issued for central and eastern South Dakota until 10pm.

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It looks like the bulk of any severe weather should pass south of the highly populated Twin Cities, but there could be a batch of thunderstorms rolling through anytime after midnight with the best chance between 3am and 7am.

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Rare quiet Weekend?

After the chance of storms overnight, we may see what has become a rarity this summer in Minnesota…a blissfully quiet weekend. Look for increasing sunshine Saturday and Sunday, with highs in the 80s.

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Lake water temps near seasonal highs:

A check of water temperatures near the Weather Lab in Lake Minnetonka this week shows a surface water temperature of 82 degrees. This is at or slightly above the peak average temperature for southern Minnesota lakes, which usually takes place from late July into mid- August.

Even Lake Superior is showing unusually warm temps this summer with lake water temps near 70 degrees at the mouth of North Shore rivers like the Knife River.

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Changes in wind direction over Lake Superior cause upwelling to bring frigid water to the surface with little warning in some areas. It is interesting to watch water temps fluctuate wildly in summer. Surface temperatures may be near 70 one day, and plunge into the 50s or even 30s in some areas with little warning. Keep that in mind if you are thinking of a dip in the big lake this summer.

What’s the water temperature at your favorite lake this weekend? Please send a comment if you have a reading from one of our 10,000+ lakes.

Enjoy the “bathwater” lake temperatures for the next few weeks.

PH

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