Special Weather Statement, NWS Aberdeen, SD

Area Forecast Discussion
National Weather Service Aberdeen SD
1201 PM CDT Sun Jun 13 2021

.UPDATE...
Issued at 1010 AM CDT Sun Jun 13 2021

Surface/low level trough across central South Dakota this morning,
but more than likely its a weak push of warm advection responsible
for morning convection near the Pierre area. A southwest component
at 700mb and northwest at 500mb leading to a more or less eastward
migration with individual cells moving southeast. Elevated CAPE
maybe around 1000j/kg but thus far convection has been shallow and
sub-severe. Updated POPs/Wx and Sky to account for adding storms
to the forecast.

&&

.SHORT TERM...(Today through Monday Afternoon)
Issued at 451 AM CDT Sun Jun 13 2021

A weak trough will set up from southwest to northeast across the
state today. There could be a few showers or thunderstorms across
the southern tier of the forecast area associated with the trough
through tonight. Any precip will have a difficult time overcoming
the mid level dry air until later tonight. High pressure will also
build back in at the sfc this evening. Needless to say, llm will be
limited as will upper level support.

Otherwise, expect above normal temperatures to persist under the
upper ridge through the short term with highs in the upper 80s to
90s.

.LONG TERM...(Monday Evening through Saturday)
Issued at 451 AM CDT Sun Jun 13 2021

The main initial focus in the long range will be on the building
heat early in the period followed by the potential for a bit a
cooler trend toward the end of the week. Heights will be increasing
Monday night into Tuesday and Wednesday as an upper level ridge
builds across the Northern Plains. The eastern fringes of our CWA
may still benefit from a slightly cooler trend on Tuesday as a
cooler airmass associated with Canadian high pressure will be
hanging on across the western Great Lakes westward through MN.
Nevertheless, temps in the 90s for most the area Tuesday into
Wednesday remain likely. Wednesday still looks to be hottest day of
the period with readings pushing 100F as an afternoon thermal ridge
sets up over our area. Some deterministic guidance is pushing a cold
front down into our area as early as Wednesday afternoon, so this
could have a play on temps and something to keep tracking the next
couple days. There remains sporadic pcpn chances in the extended,
especially toward the latter half of the term, but nothing to really
get too excited about at this time in terms of it bringing anything
meaningful to the forecast area.

&&

.AVIATION...(For the 18Z TAFS through 18Z Monday Afternoon)
Issued at 1154 AM CDT Sun Jun 13 2021

Terminals KABR,KATY,KPIR,KMBG

Terminals will remain VFR for VISBY/CIGS through the next 24-36
hours. Winds are northerly at KABR/KMBG and just turned at KPIR.
Winds at KATY are southwest but will slowly shift around to
northerly over the next few hours. All terminals will gradually
see winds become more northeast to easterly into Monday. Elevated
storms continue around the KPIR terminal, but there will be a
period later this afternoon with less coverage, only to re-develop
overnight. Confidence in coverage and location is not high enough
to include in the KPIR terminal after this initial round of
convection ends.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
&&

UPDATE...Connelly
SHORT TERM...Wise
LONG TERM...Vipond
AVIATION...Connelly

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
850 AM CDT Sun Jun 13 2021

MNZ039-046-SDZ003>011-015>023-141400-
Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-Roberts-
Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant-
Hamlin-Deuel-
850 AM CDT Sun Jun 13 2021 /750 AM MDT Sun Jun 13 2021/

This Hazardous Weather Outlook is for west central Minnesota, north
central South Dakota and northeast South Dakota.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SDZ033>037-045-048-051-141400-
Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
850 AM CDT Sun Jun 13 2021 /750 AM MDT Sun Jun 13 2021/

This Hazardous Weather Outlook is for central South Dakota.

.DAY ONE...Today and tonight.

Isolated to scattered showers and thunderstorms will occur across
portions of central South Dakota through the morning, and possibly
into the afternoon hours. A few storms may produce small hail and
frequent lightning.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

TMT

Special Weather Statement
National Weather Service Aberdeen SD
845 AM CDT Sun Jun 13 2021

SDZ034-035-131430-
Hughes SD-Sully SD-
845 AM CDT Sun Jun 13 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SULLY AND NORTH CENTRAL
HUGHES COUNTIES UNTIL 930 AM CDT...

At 845 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles southwest of Sully Lake, or 13 miles west of Onida, moving
southeast at 25 mph.

Penny size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Onida, Blunt and Sully Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Aberdeen.

&&

LAT...LON 4458 10047 4466 10054 4475 10036 4476 10015
      4465 9984 4437 10009
TIME...MOT...LOC 1345Z 295DEG 20KT 4463 10031

TMT

Special Weather Statement
National Weather Service Aberdeen SD
115 PM CDT Sun Jun 13 2021

SDZ016-034-036-131845-
Sully SD-Hyde SD-Potter SD-
115 PM CDT Sun Jun 13 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SULLY...NORTHWESTERN
HYDE AND SOUTHEASTERN POTTER COUNTIES UNTIL 145 PM CDT...

At 115 PM CDT, Doppler radar was tracking a strong thunderstorm over
Cottonwood Lake Near Agar, or 9 miles south of Gettysburg, moving
east at 30 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Stone Lake and Cottonwood Lake Near Agar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Aberdeen.

&&

LAT...LON 4491 9957 4490 9957 4489 9956 4476 9949
      4472 10001 4490 10008 4506 9965
TIME...MOT...LOC 1815Z 253DEG 28KT 4487 9990

TMT