Severe Thunderstorm Warning 79, NWS La Crosse, WI

919 
WWUS53 KARX 101709
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1209 PM CDT Mon Aug 10 2020

IAC005-043-WIC023-043-103-101745-
/O.CON.KARX.SV.W.0079.000000T0000Z-200810T1745Z/
Clayton IA-Allamakee IA-Grant WI-Richland WI-Crawford WI-
1209 PM CDT Mon Aug 10 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR CENTRAL CLAYTON...SOUTHEASTERN ALLAMAKEE...CENTRAL GRANT...
SOUTHWESTERN RICHLAND AND SOUTHERN CRAWFORD COUNTIES...

At 1208 PM CDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Harpers Ferry to 8 miles west of
Bloomington to near Guttenberg, moving east at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

These severe storms will be near...
  Cassville and Bloomington around 1225 PM CDT.
  Boscobel around 1235 PM CDT.
  Lancaster and Fennimore around 1245 PM CDT.

Other locations impacted by these severe thunderstorms include
Eastman, Highway 61 And County T, Giard, Turkey River, Beetown,
County Roads K And T and Bridgeport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4279 9149 4300 9130 4323 9118 4323 9055
      4290 9061 4266 9083 4268 9090 4265 9090
      4265 9100
TIME...MOT...LOC 1708Z 290DEG 31KT 4315 9103 4292 9108 4277 9120 

HAIL...1.00IN
WIND...70MPH
 
$$

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694 
WWUS53 KARX 101729
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1229 PM CDT Mon Aug 10 2020

IAC005-101738-
/O.CAN.KARX.SV.W.0079.000000T0000Z-200810T1745Z/
Allamakee IA-
1229 PM CDT Mon Aug 10 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALLAMAKEE COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
northeastern Iowa...and southwestern Wisconsin.

LAT...LON 4276 9137 4301 9119 4313 9118 4323 9108
      4323 9055 4290 9061 4266 9083 4268 9090
      4265 9090 4265 9100
TIME...MOT...LOC 1728Z 299DEG 38KT 4311 9098 4287 9091 4267 9095 

$$

IAC043-WIC023-043-103-101745-
/O.CON.KARX.SV.W.0079.000000T0000Z-200810T1745Z/
Clayton IA-Grant WI-Richland WI-Crawford WI-
1229 PM CDT Mon Aug 10 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR EASTERN CLAYTON...CENTRAL GRANT...SOUTHWESTERN RICHLAND AND
SOUTHERN CRAWFORD COUNTIES...

At 1228 PM CDT, severe thunderstorms were located along a line
extending from 9 miles northeast of Prairie Du Chien to Bloomington
to near Cassville, moving southeast at 45 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Law enforcement reported 63 mph wind gusts in Patch Grove.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

These severe storms will be near...
  Lancaster around 1240 PM CDT.
  Fennimore around 1255 PM CDT.

Other locations impacted by these severe thunderstorms include
Eastman, Highway 61 And County T, Turkey River, Beetown, County Roads
K And T, Bridgeport and Nelson Dewey State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4276 9137 4301 9119 4313 9118 4323 9108
      4323 9055 4290 9061 4266 9083 4268 9090
      4265 9090 4265 9100
TIME...MOT...LOC 1728Z 299DEG 38KT 4311 9098 4287 9091 4267 9095 

HAIL...1.00IN
WIND...70MPH
 
$$

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Area Forecast Discussion
National Weather Service La Crosse WI
655 AM CDT Mon Aug 10 2020

.SHORT TERM...(Today and tonight)
Issued at 221 AM CDT Mon Aug 10 2020

Early morning radar imagery showed a cluster of severe storms
moving through the Twin Cities area, just ahead of a southwest to
northeast oriented surface cold front. SPC mesoanalysis suggests
3000+ J/kg of MUCAPE ahead of these storms with effective shear of
35 to 40 kts continuing southeast with them. In addition, low
level moisture transport, while not particularly strong, does look
to persist through sunrise. Therefore, thinking these storms
should continue into the forecast area, with additional
development expected as the front continues to advance
southeastward. Time of day suggests damaging wind would be tough
to come by, but have seen a 50+ kt gust or two at times as
additional cores form and combine with ongoing convection. That
said, hail should be the main threat as these storms move in this
morning.

Meanwhile, expect additional storms to form across southern South
Dakota and eventually develop into an eastward moving MCS that
tracks across Iowa and possibly clips far southwest Wisconsin
today. Already seeing some signs of this occurring with light
showers forming along what seems to be a weak secondary surface
boundary. Eventually, expect this to develop into an eastward
moving MCS that moves across Iowa today. It should eventually
catch up to the main boundary and bring a strong to severe storm
threat to far southern portions of the forecast area. Said threat
will really depend on how far southeast the main front makes it,
with areas behind said front seeing much less of a threat.
Otherwise, could see some lighter showers farther north associated
with the aforementioned secondary boundary as it slowly sinks
southward this afternoon.

Any precip should exit by late afternoon/early evening with high
pressure building in behind the front. This should lead to
clearing skies tonight, with perhaps some fog forming in the MS
River tributaries, though winds just above the surface look like
they might be a bit too strong for more widespread development.

.LONG TERM...(Tuesday through Sunday)
Issued at 221 AM CDT Mon Aug 10 2020

Upper level flow looks to remain zonal through much of the period
with surface high pressure building in and leading to quiet
weather through Wednesday morning or so. Models are in good
agreement then of several shortwave troughs moving through the
forecast area and bringing off and on shower and storm chances
through the remainder of the period. While quite a bit of model
spread remains timing and strength (though nothing looks overly
strong), GEFS members seem to be in pretty good agreement of the
first chances moving in Wednesday. That said, the 10.00Z
GFS/ECMWF/NAM all remain dry, so forecast confidence remains
fairly low. Otherwise, expect seasonable temperatures into next
weekend, with highs generally in the 80s and lows in the 50s and
60s.

&&

.AVIATION...(For the 12Z TAFS through 12Z Monday morning)
Issued at 655 AM CDT Mon Aug 10 2020

Cigs: some potential for a brief period of MVFR cigs post shra/ts
and passage of cold front. Not seeing much evidence in obs so will
leave VFR for the moment. Skies look to clear this afternoon with
VFR expected through Tue.

WX/vsby: SHRA/TS look to clear KLSE by 14z with some impacts to vsby
and potentially small hail. With clearing skies tonight and recent
rains, fog could develop. Low level moisture on the decrease with
passage of cold front though, and have opted to not add to forecast
for now.

Winds: swinging to the north with passage of cold front. Could have
higher gusts at KLSE with any storm through 14z. Generally light
tonight.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.
&&

SHORT TERM...Rieck/CA
LONG TERM...CA
AVIATION...Rieck

Hazardous Weather Outlook
National Weather Service La Crosse WI
1039 AM CDT Mon Aug 10 2020

IAZ008>011-018-019-029-030-WIZ054-055-061-111215-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Crawford-Richland-Grant-
1039 AM CDT Mon Aug 10 2020

This Hazardous Weather Outlook is for portions of northeast Iowa
and southwest Wisconsin.

.DAY ONE...Through Tonight

Scattered severe storms developing in the late morning in
northeast Iowa and shifting into southwest Wisconsin in the early
to mid-afternoon. Severe storm threats will include large hail,
damaging wind gusts and locally heavy rain.

The threat for severe storms has increased sharply since early
this morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There are mostly small storm chances Wednesday into Sunday. The
threat for organized severe weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is more likely today. Rainfall reports are
appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

MNZ079-086>088-094>096-WIZ017-029-032>034-041>044-053-111215-
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-
Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-
1039 AM CDT Mon Aug 10 2020

This Hazardous Weather Outlook is for portions of southeast
Minnesota...and western into north central Wisconsin.

.DAY ONE...This Afternoon and Tonight

A few storms are possible early this afternoon, mostly south of
Interstate 90. Some could be strong with small hail and locally
heavy rain.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There are mostly small storm chances Wednesday into Sunday. The
threat for organized severe weather is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated. Rainfall reports are
appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

Rieck/Baumgardt

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
827 AM CDT MON AUG 10 2020

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

0803 AM     TSTM WND DMG     2 N FRIENDSHIP          44.00N 89.83W
08/10/2020                   ADAMS              WI   LAW ENFORCEMENT

            LAW ENFORCEMENT REPORTED A TREE DOWN NEAR
            13TH DRIVE AND CYPRESS DRIVE.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
831 AM CDT MON AUG 10 2020

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

0748 AM     TSTM WND DMG     5 SW NEW ROME           44.19N 89.96W
08/10/2020                   JUNEAU             WI   LAW ENFORCEMENT

            LAW ENFORCEMENT REPORTED A TREE DOWN IN
            ARMENIA TOWNSHIP.

&&

Special Weather Statement
National Weather Service La Crosse WI
847 AM CDT Mon Aug 10 2020

MNZ086-087-094-101500-
Olmsted-Dodge-Mower-
847 AM CDT Mon Aug 10 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN OLMSTED...MOWER
AND DODGE COUNTIES...

At 846 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Owatonna to Geneva. Movement was
east at 45 mph.

Winds in excess of 30 mph and penny size hail are possible with these
storms.

Locations impacted include...
Rochester, Austin, Dodge Center, Mantorville, Kasson, Stewartville,
Byron, Hayfield, Oronoco, Grand Meadow, Le Roy, Adams, West Concord,
Brownsdale, Lyle, Claremont, Rose Creek, High Forest, and Lansing.

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4377 9305 4420 9304 4419 9245 4350 9245
      4350 9305
TIME...MOT...LOC 1346Z 276DEG 37KT 4411 9311 4380 9328

CA

Special Weather Statement
National Weather Service La Crosse WI
958 AM CDT Mon Aug 10 2020

IAZ008-009-018-019-101545-
Floyd-Chickasaw-Howard-Mitchell-
958 AM CDT Mon Aug 10 2020

...THUNDERSTORMS AFFECTING SOUTHERN MITCHELL...HOWARD... FLOYD AND
CHICKASAW COUNTIES...

Thunderstorms will continue to develop and possibly intensify across
the area through 11 AM. A few storms could become severe with the
potential for damaging winds and large hail. Monitor the weather
closely this morning into early this afternoon.

Scattered thunderstorms will continue across the area through 11 AM
this morning. Winds in excess of 40 mph and half inch hail are
possible with these storms. These storms may intensify, so be
certain to monitor local radio stations and available television
stations for additional information and possible warnings from the
National Weather Service.

LAT...LON 4331 9302 4345 9208 4291 9208 4291 9303
TIME...MOT...LOC 1453Z 252DEG 20KT 4306 9309

Wetenkamp

Special Weather Statement
National Weather Service La Crosse WI
1059 AM CDT Mon Aug 10 2020

IAZ008>011-018-019-029-030-101645-
Clayton-Floyd-Winneshiek-Chickasaw-Howard-Fayette-Allamakee-Mitchell-
1059 AM CDT Mon Aug 10 2020

...Severe Thunderstorms Possible Through Mid Afternoon...

Thunderstorms will continue to develop and possibly intensify across
the area through early this afternoon.  Some of the storms could
become severe with large hail and damaging winds.

Look for scattered strong thunderstorms to persist through early
afternoon. Winds in excess of 40 mph and half inch hail are possible
with these storms.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.

LAT...LON 4330 9284 4347 9140 4273 9137 4275 9208
      4291 9208 4291 9301
TIME...MOT...LOC 1557Z 260DEG 21KT 4328 9200

Wetenkamp

Special Weather Statement
National Weather Service La Crosse WI
1144 AM CDT Mon Aug 10 2020

IAZ010-011-029-030-WIZ054-055-061-101730-
Clayton-Winneshiek-Fayette-Allamakee-Richland-Crawford-Grant-
1144 AM CDT Mon Aug 10 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CLAYTON...CENTRAL
FAYETTE...SOUTHERN ALLAMAKEE...SOUTHEASTERN WINNESHIEK...CENTRAL
GRANT...SOUTHWESTERN RICHLAND AND SOUTHERN CRAWFORD COUNTIES...

At 1143 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Harpers Ferry to near Farmersburg to
near Arlington. Movement was east at 45 mph.

Winds in excess of 40 mph and half inch hail are possible with these
storms.

Locations impacted include...
Prairie Du Chien, Lancaster, West Union, Guttenberg, Elkader,
Boscobel, Fennimore, Postville, Monona, Fayette, Strawberry Point,
Cassville, McGregor, Garnavillo, Bloomington, Elgin, Clermont,
Maynard, Arlington and Marquette.

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4276 9205 4309 9183 4326 9138 4323 9054
      4288 9063 4265 9100 4264 9116
TIME...MOT...LOC 1643Z 276DEG 41KT 4316 9117 4295 9128 4280 9169

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