Special Weather Statement, NWS Twin Cities, MN

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
647 AM CDT Sun Aug 9 2026

.KEY MESSAGES...

- Scattered showers and thunderstorms to persist through
  sunrise, a few producing hail and gusty winds, followed by
  partial clearing this afternoon.

- The next best chance for rain comes early Tuesday morning,
  then dry for much of the upcoming week.

- Temperatures to remain very close to normal values through
  Wednesday, then drop below normal Thursday onward.

&&

.DISCUSSION...
Issued at 407 AM CDT Sun Aug 9 2026

A bit of a nondescript surface pressure pattern sits over the
WFO MPX coverage area with some scattered showers/thunderstorms
early this morning over far eastern MN through western WI. A few
meager troughs at the surface can be analyzed while the main
surface low lingers over eastern SD/NE. Aloft, the large trough
emanating from Hudson Bay continues to rotate several shortwave
disturbances around its western and southern fringes through the
Upper Midwest. The most important feature is LLJ in between
900-700mb, helping spark the thunderstorm activity within an
environment sporting a roughly 1.50" PWAT. The
moisture/instability gradient shows up nicely at the surface
with dewpoints into the low- mid 60s in western MN while
dewpoints in the mid 50s to around 60 are evident in eastern MN
to western WI.

The expectation is that going towards sunrise, the push of the
surface low into IA within the elevated moisture/unstable
environment will help fill in the area over southwestern-
southern MN with additional showers/thunderstorms. Not
necessarily expecting much in the way of strong-severe
thunderstorms but the storms ongoing overnight have generally
produced 0.25"-0.50" hail along with frequent lightning and
rainfall rates nearing 1 in/hr. The storms are progressive to
the east, thus mitigating flooding concerns thus far. However,
should storm coverage overachieve, even FFG over 2 in/hr could
be realized in pockets.

Storms are expected to wane in coverage/intensity from late
morning into the early afternoon, with partial clearing
thereafter as the low pressure center and its associated fronts
move to the E and SE of the coverage area. This will then allow
high pressure to nudge southward from Canada. While this
scenario will not bring in an airmass change in terms of
temperatures/dewpoints, it will push the lingering frontal
boundary far south enough to allow for dry weather to prevail
from this afternoon through Monday evening. The front does look
to retreat back north just enough to spawn another round of
scattered showers/thunderstorms early morning Tuesday, in
conjunction with one last gasp from the upper low over eastern
NOAM. Like this morning, there is the possibility of a few
stronger storms but organization is again lacking as is diurnal
assistance due to the overnight timing.

The rest of the week looks to run mainly dry aside from an
isolated chance here or there of a few showers. The topic then
changes to one of temperatures as temperatures will remain
generally close to normal through Wednesday with highs in the
upper 70s to lower 80s, possibly as high as 84-85 degrees. The
upper ridge over the western CONUS is expected to flatten/shift
southward slightly while the NOAM trough shifts to the eastern
seaboard, making for more pronounced northwest flow aloft for
the north-central CONUS. Cooler western Canadian high pressure
will slide southeast to the Upper Midwest, bringing a cooler
airmass to our region from Thursday onward. This will push highs
into the 70s area-wide for the latter portion of the week, with
lows into the 50s away from the Twin Cities metro (and near 60
within the TC metro).

&&

.AVIATION /12Z TAFS THROUGH 18Z MONDAY/...
Issued at 641 AM CDT Sun Aug 9 2026

Thunderstorms have filled in over much of southern MN at
initialization time this morning and will continue shifting off
to the SE, mainly impacting MKT and possibly the WI TAF sites
for the first 1-2hrs of this set. All others will remain dry
throughout, with all sites having gradually clearing skies to
only high passing cirrus/smoke by late morning, persisting
through Monday morning. Variable winds around 5kts will settle
on a northerly direction by mid-afternoon and remain there
through tomorrow morning.

KMSP...Not only does convection look to remain south of MSP and
not be a concern, but ceilings have returned to VFR after
briefly within MVFR range prior to the 12z sending deadline.
Thus, will run with VFR conditions for this entire duration as
no additional thunderstorms are expected.

/OUTLOOK FOR KMSP/
TUE...Mainly VFR. Chc early A.M. -SHRA. Wind NE 5-10 kts.
WED...VFR. Wind N 5-10 kts becoming NW.
THU...VFR. Wind N 5-10 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
MN...None.
WI...None.

&&

DISCUSSION...JPC
AVIATION...JPC

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
411 AM CDT Sun Aug 9 2026

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
100900-
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-
411 AM CDT Sun Aug 9 2026

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

.DAY ONE...Today and Tonight.

Scattered thunderstorms are expected through late this morning
across much of the coverage area. A few storms may produce hail,
gusty winds, frequent lightning and brief heavy rain. Severe
storms cannot be entirely ruled out but chances are low.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Scattered thunderstorms are forecast to develop late Monday night
into early Tuesday morning across much of the coverage area. A
few storms may produce hail, gusty winds, frequent lightning and
brief heavy rain. Severe storms cannot be entirely ruled out but
chances are low.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation is not expected to be needed.

Preliminary Local Storm Report
National Weather Service Twin Cities/Chanhassen MN
604 AM CDT Sun Aug 9 2026

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

0545 AM     Hail             1 SE Fairmont           43.65N 94.45W
08/09/2026  M1.00 Inch       Martin             MN   Public

            Report from mPING: Quarter (1.00 in.).

&&

mpg

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
614 AM CDT Sun Aug 9 2026

MNZ083-084-092-091200-
Blue Earth MN-Waseca MN-Faribault MN-
614 AM CDT Sun Aug 9 2026

...A LINE OF STRONG THUNDERSTORMS WILL IMPACT FARIBAULT...
SOUTHEASTERN BLUE EARTH AND SOUTHWESTERN WASECA COUNTIES UNTIL 7 AM
CDT...

At 614 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from near Good Thunder to 11 miles south of
Elmore, or extending from 15 miles south of Mankato to 29 miles
southeast of Fairmont, moving east at 25 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  Blue Earth, Wells, Mapleton, Minnesota Lake, Elmore, Good Thunder,
  Amboy, Bricelyn, Vernon Center, Pemberton, Waldorf, Easton, Frost,
  Delavan, Kiester, Brush Creek, Walters, Baroda and Alma City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

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

&&

LAT...LON 4385 9416 4402 9418 4406 9364 4385 9364
      4385 9365 4350 9365 4350 9414 4358 9413
TIME...MOT...LOC 1114Z 271DEG 22KT 4394 9404 4358 9400 4336 9403

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

MPG

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
623 AM CDT Sun Aug 9 2026

MNZ076-077-083>085-091230-
Steele MN-Waseca MN-Le Sueur MN-Rice MN-Blue Earth MN-
623 AM CDT Sun Aug 9 2026

...A LINE OF STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN BLUE
EARTH...NORTHERN WASECA...RICE...SOUTHEASTERN LE SUEUR AND
NORTHWESTERN STEELE COUNTIES UNTIL 730 AM CDT...

At 623 AM CDT, Doppler radar was tracking a line of strong
thunderstorms extending from near Montgomery to near Eagle Lake, or
extending from 17 miles northwest of Faribault to near Mankato,
moving east at 35 mph.

HAZARD...Wind gusts up to 30 mph and half inch size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Faribault, Northfield, Waseca, Lonsdale, Montgomery, Janesville,
  Waterville, Dundas, Medford, Madison Lake, Morristown, Elysian,
  Warsaw, Nerstrand, Bridgewater, Clinton Falls and Kilkenny.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4423 9402 4426 9384 4454 9354 4447 9328
      4447 9304 4437 9304 4424 9313 4398 9339
      4422 9401
TIME...MOT...LOC 1123Z 283DEG 28KT 4446 9352 4435 9375 4421 9392

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

MPG

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
735 AM CDT Sun Aug 9 2026

MNC013-043-091-165-091530-
Faribault-Martin-Blue Earth-Watonwan-
735 AM CDT Sun Aug 9 2026

...URBAN AND SMALL STREAM FLOODING EXPECTED...

Thunderstorms with heavy rain will cause minor flooding in the
following counties...

Faribault...Martin...Blue Earth...Watonwan...

* Until 1030 AM CDT.

* At 734 AM CDT, Doppler radar indicated heavy rain due to
  thunderstorms. This will cause urban and small stream flooding in
  the area. 2 to 4 inches of rain have fallen, with totals up to 4.5
  inches possible.

* Some locations that will experience minor flooding include...
  Fairmont, Blue Earth, Madelia, Mapleton, Winnebago, Sherburn,
  Truman, Minnesota Lake, Welcome, Elmore, Good Thunder, and Amboy.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 4351 9481 4410 9453 4402 9377 4350 9379

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
916 AM CDT Sun Aug 9 2026

MNZ053-WIZ014-091515-
Polk WI-Chisago MN-
916 AM CDT Sun Aug 9 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CHISAGO AND
SOUTHEASTERN POLK COUNTIES UNTIL 1015 AM CDT...

At 916 AM CDT, Doppler radar was tracking a strong thunderstorm near
Center City, or 26 miles east of Cambridge, moving southeast at 30
mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  Lindstrom, Amery, Osceola, St. Croix Falls, Clear Lake, Taylors
  Falls, Dresser, Center City, Shafer, Wanderoos, Nye, Deronda, and
  East Farmington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4530 9275 4530 9278 4535 9287 4550 9273
      4529 9216 4526 9216 4521 9220 4521 9263
      4529 9276
TIME...MOT...LOC 1416Z 302DEG 25KT 4540 9275

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

MPG

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
922 AM CDT Sun Aug 9 2026

WIZ027-091500-
Chippewa WI-
922 AM CDT Sun Aug 9 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN CHIPPEWA COUNTY
UNTIL 10 AM CDT...

At 922 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Cornell, or 13 miles south of Ladysmith, moving east
at 30 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  Holcombe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4511 9092 4524 9120 4529 9120 4529 9093
      4512 9093 4512 9092
TIME...MOT...LOC 1422Z 288DEG 25KT 4528 9113

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH

MPG