Severe Thunderstorm Warning 136, NWS Twin Cities, MN

336 
WWUS53 KMPX 280458
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1158 PM CDT Thu Jul 27 2023

MNC013-079-103-280545-
/O.CON.KMPX.SV.W.0136.000000T0000Z-230728T0545Z/
Le Sueur MN-Blue Earth MN-Nicollet MN-
1158 PM CDT Thu Jul 27 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN LE SUEUR...NORTHERN BLUE EARTH AND NICOLLET
COUNTIES...

At 1158 PM CDT, severe thunderstorms were located along a line
extending from 8 miles south of Gaylord to near Nicollet to near
Courtland, moving southeast at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
  St. Peter, North Mankato, Kasota, Mankato and Cleveland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4404 9404 4423 9437 4427 9437 4446 9422
      4446 9404 4443 9374 4412 9394
TIME...MOT...LOC 0458Z 306DEG 28KT 4443 9417 4432 9421 4422 9430 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Borghoff

030 
WWUS53 KMPX 280509
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1209 AM CDT Fri Jul 28 2023

MNC013-079-103-280545-
/O.CON.KMPX.SV.W.0136.000000T0000Z-230728T0545Z/
Le Sueur MN-Blue Earth MN-Nicollet MN-
1209 AM CDT Fri Jul 28 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN LE SUEUR...NORTHERN BLUE EARTH AND EASTERN NICOLLET
COUNTIES...

At 1209 AM CDT, severe thunderstorms were located along a line
extending from 7 miles northwest of St. Peter to near Nicollet to 5
miles north of Lake Crystal, moving southeast at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Mankato, North Mankato, St. Peter, Nicollet, Kasota, Cleveland,
Judson, Oshawa, Skyline, Ottawa, Mankato Airport and St Henry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4419 9431 4429 9420 4446 9412 4446 9404
      4443 9374 4412 9394 4404 9404
TIME...MOT...LOC 0509Z 296DEG 27KT 4440 9408 4429 9412 4419 9421 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Borghoff

412 
WWUS53 KMPX 280528
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1228 AM CDT Fri Jul 28 2023

MNC013-079-103-280545-
/O.CON.KMPX.SV.W.0136.000000T0000Z-230728T0545Z/
Le Sueur MN-Blue Earth MN-Nicollet MN-
1228 AM CDT Fri Jul 28 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN LE SUEUR...NORTHEASTERN BLUE EARTH AND SOUTHEASTERN
NICOLLET COUNTIES...

At 1228 AM CDT, severe thunderstorms were located along a line
extending from near St. Peter to near Kasota to near North Mankato,
moving southeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Mankato, North Mankato, St. Peter, Kasota, Cleveland, Skyline,
Mankato Airport and Minneopa State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4410 9416 4425 9403 4438 9398 4434 9379
      4412 9394 4404 9404
TIME...MOT...LOC 0528Z 296DEG 27KT 4434 9392 4423 9396 4413 9405 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Borghoff

604 
WWUS53 KMPX 280536
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1236 AM CDT Fri Jul 28 2023

MNC103-280546-
/O.CAN.KMPX.SV.W.0136.000000T0000Z-230728T0545Z/
Nicollet MN-
1236 AM CDT Fri Jul 28 2023

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

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

LAT...LON 4404 9404 4409 9414 4417 9403 4417 9401
      4419 9401 4436 9391 4434 9379 4412 9394
TIME...MOT...LOC 0536Z 298DEG 32KT 4425 9379 4414 9383 4404 9392 

$$

MNC013-079-280545-
/O.CON.KMPX.SV.W.0136.000000T0000Z-230728T0545Z/
Le Sueur MN-Blue Earth MN-
1236 AM CDT Fri Jul 28 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN LE SUEUR AND NORTHEASTERN BLUE EARTH COUNTIES...

At 1236 AM CDT, severe thunderstorms were located along a line
extending from near Madison Lake to near Eagle Lake to near St.
Clair, moving southeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Mankato, North Mankato, Cleveland, Skyline and Mankato Airport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4404 9404 4409 9414 4417 9403 4417 9401
      4419 9401 4436 9391 4434 9379 4412 9394
TIME...MOT...LOC 0536Z 298DEG 32KT 4425 9379 4414 9383 4404 9392 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Borghoff

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
913 PM CDT Thu Jul 27 2023

.UPDATE...
Issued at 840 PM CDT Thu Jul 27 2023

Disorganized, lines of thunderstorms are currently present from
central MN into northern half of WI. These mostly zonal lines have
formed due to various boundaries (convective outflows, a surface
trough and trailing cold front) interacting within the very moist, unstable
air. While most of the severe weather threat has diminished,
training storms have been observed and are expected to continue for
the next several hours. MPX 00z ROAB shows PWATs exceeding 1.8" and
a very high freezing level, which should allow for very heavy
rainfall rates. As such, have issued a Flash Flood Watch for portions
of east-central MN (including the Twin Cities metro) and all of our
WI counties until 4 AM Friday morning.

&&

.DISCUSSION...(This evening through Thursday)
Issued at 321 PM CDT Thu Jul 27 2023

Key Messages:

- Today and overnight, high impact severe weather possible across
  mainly eastern Minnesota and west central Wisconsin. Damaging wind
  greater than 75 mph, and hail larger than tennis balls are possible
  with the storms.

- Friday, additional severe storms are possible, but this depends on
  how the overnight storms play out.

- Looking ahead, temperatures will be more seasonable next week,
  with occasional chances for thunderstorms.

Discussion...

Today and tonight…There is potential for high impact severe weather
later this afternoon into early tonight. Storms that develop will
have the potential for very large hail and damaging wind. The main
driver behind this set up is extreme amounts of instability due to
the hot and humid surface conditions, together with dry mid levels of
the atmosphere. The end result is MLCAPE values of over 4000 J/kg.
In addition, deep layer shear was on the order of 40 kts, which means
organized convection with strong updrafts. However, the 0-1km shear
was less than 10 kts, and the effective helicity was around 100 kts
or less. For this reason, the main threat with these storms is very
large hail, especially once they develop. After that, HiRes models
support the idea of a cold pool developing and these storms
congealing into a line, with strong winds becoming the primary
threats. Additional development is possible into the overnight hours,
but the main concern is between now and midnight. The main takeaway
from all of this is to continue to monitor the forecast, and know
where to seek shelter if warnings are issued for your location later
today.

Friday…There is a conditional threat for severe weather across
southern Minnesota into west central Wisconsin, but a lot will depend
on how the overnight convection plays out. Current thinking is that
the atmosphere will have time to destabilize with another round of
storms developing during the afternoon and evening. Once again the
deep layer shear and CAPE profiles would support severe weather.
There is a marginal risk of severe storms, but this could get
adjusted once the first round of storms moves through. A lot will
depend on where the boundaries set up, as cold air advection will be
moving in from the north.

Saturday through Thursday…A weak cold font is forecast to move
through the region and bring a slight reprieve from the heat and
humidity. This will also bring dry conditions over the weekend. Where
this frontal boundary eventually ends up and how quickly it returns
northward will determine when and where rain chances return.
Northwest flow will bring a few weak systems across the region, and
these could spark showers and thunderstorms across the Upper Midwest,
but the majority of the precipitation will be focused along the
aforementioned boundary which should be across the Upper Missouri
River basin. No changes were made to the blended forecast, and there
are small chances for precipitation next week.

&&

.AVIATION...(For the 00Z TAFS through 00Z Friday evening)
Issued at 603 PM CDT Thu Jul 27 2023

A small cluster of storms has formed just east of RWF along a
boundary that stretches zonally across south-central MN. Expecting
a broken line of storms to develop along this boundary within the
next 1-2 hours as the incoming shortwave approaches. These storms
will then move east, likely affecting MSP, MKT, RNH, and EAU into
late this evening. Conditions could drop to IFR with the heavy rain
and any wind gusts from the storms would likely be strong. Once the
storms exit to our east early Friday morning, VFR conditions expected
the remainder of the period with scattered high clouds. Southerly
winds this evening become northeasterly overnight and then trend more
northerly tomorrow afternoon. Aside from gusts from storms, speeds
will be between 5-10 knots.

KMSP...Potential for 2 rounds of storms tonight, with the first round
possible between 01-05z. These storms should be the strongest with
IFR conditions and strong wind gusts possible. Another round of
storms is possible after 2am as the cold front moves through.

/OUTLOOK FOR KMSP/
Sat...VFR. Wind N 5-10 kts.
Sun...VFR. Wind NE 10-15 kts.
Mon...VFR. Wind SE 5-10 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
MN...Flood Watch until 4 AM CDT Friday for Anoka-Carver-Chisago-Dakota-
     Hennepin-Isanti-Ramsey-Scott-Sherburne-Washington-Wright.

WI...Flood Watch until 4 AM CDT Friday for Barron-Chippewa-Dunn-Eau
     Claire-Pepin-Pierce-Polk-Rusk-St. Croix.

&&

UPDATE...CTG
DISCUSSION...JRB
AVIATION...CTG

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
136 PM CDT Thu Jul 27 2023

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
281845-
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-
136 PM CDT Thu Jul 27 2023

This Hazardous Weather Outlook is for portions of central and
southern Minnesota, and west central Wisconsin.

.DAY ONE...This Afternoon and Tonight.

Excessive heat is expected today with Heat Index values of 100 to
110 degrees this afternoon.

Severe thunderstorms are possible late this afternoon through the
overnight hours. Large hail & damaging winds are the main
hazards, along with locally heavy rain. The greatest risk for
severe storms will be from central Minnesota into northwest
Wisconsin, where there is an Enhanced Risk (risk level 3 of 5) of
severe weather.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Thunderstorms are possible Friday, along with the chance for
isolated severe weather.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will likely be needed this afternoon
and evening.

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
921 PM CDT Thu Jul 27 2023

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

0850 PM     Hail             Litchfield              45.12N 94.53W
07/27/2023  M0.88 inch       Meeker             MN   Trained Spotter

            Trained Spotter measured nickel sized hail
            in Litchfield, MN.

&&

RMD

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
924 PM CDT Thu Jul 27 2023

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

0850 PM     Hail             1 NNE Litchfield        45.13N 94.52W
07/27/2023  E1.00 inch       Meeker             MN   Public

            Report from mPING: Quarter (1.00 in.). Time
            estimated via radar.

&&

RMD

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
933 PM CDT Thu Jul 27 2023

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

0434 PM     Hail             1 W Rush City           45.68N 92.98W
07/27/2023  E1.50 inch       Chisago            MN   Public

            Report from mPING: Ping Pong Ball (1.50
            in.).

&&

RMD

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
941 PM CDT Thu Jul 27 2023

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

0915 PM     Rain             1 N Andover             45.26N 93.30W
07/27/2023  M1.50 inch       Anoka              MN   Trained Spotter

            Trained Spotter measured 1.5 inches of rain
            from 8:30 PM to 9:15 PM storm.

&&

RMD

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
943 PM CDT Thu Jul 27 2023

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

0930 PM     Hail             Lake Lillian            44.95N 94.88W
07/27/2023  M1.00 inch       Kandiyohi          MN   Emergency Mngr

            Emergency Management reported quarter size
            hail in the city of Lake Lillian, MN.

&&

RMD

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
1057 PM CDT Thu Jul 27 2023

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

0730 PM     Hail             3 SE Weber              45.44N 93.08W
07/27/2023  M1.25 inch       Isanti             MN   Public

            Delayed report via Facebook, mix of quarter
            to half dollar sized hail.

&&

TDH