Special Weather Statement, NWS Bismarck, ND

Area Forecast Discussion
National Weather Service Bismarck ND
912 AM CDT Sat Aug 7 2021

.UPDATE...
Issued at 906 AM CDT Sat Aug 7 2021

Storms continue to slowly progress eastwards with the strongest
storms mainly in Adams county as well as far western Sioux
county. These storms are expected to remain below severe criteria,
although hail as large as nickels is possible at times. Increased
PoPs and QPF a bit further south while reducing PoPs in the north
and east over the next few hours.

UPDATE Issued at 702 AM CDT Sat Aug 7 2021

Have updated to increase pops and qpf across the south.

&&

.SHORT TERM...(Today and tonight)
Issued at 400 AM CDT Sat Aug 7 2021

A large area of showers with embedded thunderstorms developed
earlier just west of Dickinson just ahead of the cutoff H5 low and
in an area of surface convergence and diffluence aloft. This area
continued to increase in coverage and radar estimates of around
an inch or rain were likely welcome by those where the rain was
falling.

Following the NAM12, which has predicted not only this convection
but the convection in northeast South Dakota very well, this area
of showers and storms will begin to kick east and outpace its
source of support and weaken as it moves into the Bismarck area by
around 9 AM CDT. It is reinvigorated east of Bismarck around noon
as favorable jet stream dynamics ahead of the H5 low encounter it
and drive it through the Jamestown area for the mid afternoon.

Outside of that, and until the mid level trough passes through,
isolated showers and storms will continue to form. Any severe
weather will be limited to the regeneration of the convection east
of Bismarck this afternoon and would be very limited, more likely
across the state line in South Dakota.

Behind the system comes a clearing sky tonight and dim sunshine
through smoke / haze on Sunday.

.LONG TERM...(Sunday through Friday)
Issued at 400 AM CDT Sat Aug 7 2021

Sunday is the dry day between the exiting Saturday activity and
the incoming Sunday night and Monday event. Most areas will reach
90 to 95 for highs on Sunday before a string of 75 to 85, give or
take, for the foreseeable future after that.

That next long wave trough approaches for Sunday night into Monday
and hangs around into Tuesday (east). The closed low center on
this one rides along the U.S. Canada border with the better
chances for rain over the north.

&&

.AVIATION...(For the 12Z TAFS through 12Z Sunday morning)
Issued at 400 AM CDT Sat Aug 7 2021

An area of showers with a few embedded thunderstorms in the KDIK
area at 07/09Z will move east and through KBIS around 07/14Z and
weaken. It will regenerate east of KBIS and move through the KJMS
area during the mid and late afternoon. This as a low pressure
trough moves out of Montana and into North Dakota. Thunderstorms
will not be severe but gusty wind with them and brief downpours of
rain should be expected. Isolated showers and storms for the rest
of the area, ending from the west late this afternoon. For the
most part VFR ceilings and visibilities outside of areas of
convection. Smoke will continue to make for a hazy look to the
sky.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

UPDATE...Telken
SHORT TERM...JPM
LONG TERM...JPM
AVIATION...JPM

Hazardous Weather Outlook
National Weather Service Bismarck ND
915 AM CDT Sat Aug 7 2021

NDZ011>013-018>023-025-032>037-040>048-050-051-081415-
Ward-McHenry-Pierce-Dunn-Mercer-Oliver-McLean-Sheridan-Wells-
Foster-Billings-Stark-Morton-Burleigh-Kidder-Stutsman-Slope-
Hettinger-Grant-Bowman-Adams-Sioux-Emmons-Logan-La Moure-McIntosh-
Dickey-
915 AM CDT Sat Aug 7 2021 /815 AM MDT Sat Aug 7 2021/

This Hazardous Weather Outlook is for portions of north central
North Dakota, south central North Dakota, southeast North Dakota,
and southwest North Dakota.

.DAY ONE...Today and Tonight

Isolated thunderstorms today, some with gusty winds and brief
downpours of rain. Severe weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Get those rain reports in to the National Weather Service so we
can share your good news of the rain you got!

NDZ001>005-009-010-017-031-081415-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-
McKenzie-Golden Valley-
915 AM CDT Sat Aug 7 2021 /815 AM MDT Sat Aug 7 2021/

This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, and southwest North Dakota.

.DAY ONE...Today and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

Telken

Special Weather Statement
National Weather Service Bismarck ND
423 AM MDT Sat Aug 7 2021

NDZ018-033-071115-
Stark ND-Dunn ND-
423 AM MDT Sat Aug 7 2021

...Strong thunderstorms will impact portions of southeastern Dunn and
eastern Stark Counties through 515 AM MDT...

At 423 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles east of Manning to 6 miles south of
Gladstone. Movement was northeast at 10 mph.

HAZARD...Winds in excess of 40 mph and penny 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...
  Richardton, Halliday and Taylor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4746 10227 4679 10219 4667 10262 4723 10268
TIME...MOT...LOC 1023Z 219DEG 9KT 4719 10256 4678 10252

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

MJONES

Special Weather Statement
National Weather Service Bismarck ND
546 AM MDT Sat Aug 7 2021

NDZ041-042-071230-
Grant ND-Hettinger ND-
546 AM MDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of northeastern
Hettinger and northwestern Grant Counties through 630 AM MDT...

At 545 AM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Mott, moving east at 15 mph.

HAZARD...Winds in excess of 40 mph and nickel 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.

This storm will remain over mainly rural areas of northwestern Grant
and northeastern Hettinger Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4636 10233 4658 10241 4663 10219 4663 10210
      4666 10210 4671 10191 4640 10181
TIME...MOT...LOC 1145Z 257DEG 15KT 4647 10226

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

MJONES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
808 AM CDT SAT AUG 7 2021

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

0807 AM     HEAVY RAIN       8 N BELFIELD            47.00N 103.20W
08/07/2021  M1.20 INCH       BILLINGS           ND   PUBLIC

            STORM TOTAL THUS FAR. RELAYED VIA SOCIAL
            MEDIA.

&&

ZH

Special Weather Statement
National Weather Service Bismarck ND
755 AM MDT Sat Aug 7 2021

NDZ041-044-071430-
Hettinger ND-Adams ND-
755 AM MDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of southeastern
Hettinger and northeastern Adams Counties through 830 AM MDT...

At 755 AM MDT, Doppler radar was tracking a strong thunderstorm 13
miles south of Mott, moving east at 20 mph.

HAZARD...Nickel size hail.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of southeastern
Hettinger and northeastern Adams Counties, including the following
locations... Burt.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4626 10266 4649 10216 4616 10199 4609 10200
      4605 10259
TIME...MOT...LOC 1355Z 258DEG 17KT 4619 10240

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH

HARGROVE

Special Weather Statement
National Weather Service Bismarck ND
825 AM MDT Sat Aug 7 2021

NDZ042-044-045-071500-
Grant ND-Sioux ND-Adams ND-
825 AM MDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of southwestern Sioux,
southwestern Grant and east central Adams Counties through 900 AM
MDT...

At 824 AM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Keldron, or 17 miles northeast of Lemmon, moving
northeast at 10 mph.

HAZARD...Half inch hail.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of southwestern Grant,
southwestern Sioux and east central Adams Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4601 10215 4621 10203 4621 10200 4625 10200
      4628 10198 4612 10154 4596 10183
TIME...MOT...LOC 1424Z 212DEG 9KT 4605 10184

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

HARGROVE