Severe Thunderstorm Warning 35, NWS Aberdeen, SD

260 
WWUS53 KABR 242234
SVSABR

Severe Weather Statement
National Weather Service Aberdeen SD
534 PM CDT THU MAY 24 2018

SDC085-242300-
/O.CON.KABR.SV.W.0035.000000T0000Z-180524T2300Z/
Lyman SD-
534 PM CDT THU MAY 24 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR EASTERN LYMAN COUNTY...

At 532 PM CDT, a severe thunderstorm was located near Reliance, or 13
miles west of Chamberlain, moving northeast at 20 mph.

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

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Lower Brule, Lyman, Oacoma, Reliance, Medicine Butte, Counselor Creek
Boat Access Area, Tailrace Rec Area, Dude Ranch, Lake Francis Case
and Lake Sharpe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4374 9962 4377 9965 4373 9967 4375 9968
      4376 9968 4376 9969 4372 9972 4375 9974
      4374 9977 4371 9975 4370 9986 4367 9987
      4370 9990 4369 9998 4410 9964 4411 9960
      4400 9935 4390 9936 4386 9931 4358 9962
TIME...MOT...LOC 2232Z 239DEG 17KT 4381 9959 

HAIL...0.88IN
WIND...60MPH
 
$$

Dorn

629 
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Severe Weather Statement
National Weather Service Aberdeen SD
546 PM CDT THU MAY 24 2018

SDC085-242300-
/O.CON.KABR.SV.W.0035.000000T0000Z-180524T2300Z/
Lyman SD-
546 PM CDT THU MAY 24 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHEASTERN LYMAN COUNTY...

At 546 PM CDT, a severe thunderstorm was located near Reliance, or 11
miles northwest of Chamberlain, moving northeast at 30 mph.

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

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Lyman, Oacoma, Reliance, Medicine Butte, Dude Ranch and Lake Francis
Case.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4374 9962 4377 9965 4373 9967 4375 9968
      4376 9968 4376 9969 4372 9972 4375 9974
      4374 9977 4371 9975 4370 9986 4367 9987
      4370 9990 4405 9968 4399 9943 4392 9936
      4390 9936 4386 9931 4358 9962
TIME...MOT...LOC 2246Z 214DEG 27KT 4390 9951 

HAIL...0.88IN
WIND...60MPH
 
$$

Telken

844 
WWUS53 KABR 242256
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Severe Weather Statement
National Weather Service Aberdeen SD
556 PM CDT THU MAY 24 2018

SDC085-242306-
/O.EXP.KABR.SV.W.0035.000000T0000Z-180524T2300Z/
Lyman SD-
556 PM CDT THU MAY 24 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LYMAN COUNTY WILL
EXPIRE AT 600 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.

LAT...LON 4374 9962 4377 9965 4373 9967 4375 9968
      4376 9968 4376 9969 4372 9972 4375 9974
      4374 9977 4371 9975 4370 9986 4367 9987
      4370 9990 4405 9968 4399 9943 4392 9936
      4390 9936 4386 9931 4358 9962
TIME...MOT...LOC 2256Z 214DEG 27KT 4395 9946 

$$

Telken

Area Forecast Discussion
National Weather Service Aberdeen SD
347 PM CDT Thu May 24 2018

.SHORT TERM...(This Evening through Friday Afternoon)
Issued at 345 PM CDT Thu May 24 2018

Diurnal cumulus clouds have developed across portions of eastern SD
and western MN as the pre-frontal air mass in which they reside
continues to destabilize. This front could become an area of
focus for thunderstorm development by the early evening, as the
right entrance region of a 70kt jet streak continues northeast
towards the area. However confidence has decreased in overall
coverage of storms, and thus POPs have been lowered accordingly.
That said, a favorable environment for severe weather,
particularly damaging winds, is in place for storms that do fire.
Steep low and mid-level lapse rates, SBCAPE generally between
2000-3000 J/kg, dry air at the mid levels and inverted-V
soundings, as well as DCAPE above 1200 J/kg would help contribute
to severe- level wind gusts. Thanks in part to marginal deep-layer
shear, storms may not be organized enough for particularly large
hail, but large hail is still a concern. A few storms may last
into tonight before they move out of the CWA/the environment
becomes less favorable.

Another warm day is in store for the area on Friday, with high temps
in the upper 80s and lower 90s thanks to an incoming ridge. Dry
weather with mostly sunny skies is also expected.

.LONG TERM...(Friday Evening through Thursday)
Issued at 345 PM CDT Thu May 24 2018

A fairly strong upper level ridge will build over the central part
of the country Friday night, then will remain dominant over the area
through the day Monday. Shortwave energy will eject northeastward
from a western U.S. low Monday night, with the main shortwave trough
tracking across the Northern Plains on Tuesday. Weak ridging builds
back in Wednesday and Thursday.

At the surface, weak high pressure will be in place Friday night and
Saturday, keeping conditions dry. Southerly flow develops Saturday
night as the high pushes east and low pressure approaches from the
west. Scattered showers and storms may develop in this area Saturday
night, aided by a 40-50 knot low level jet. Warming aloft should
result in a capped atmosphere on Sunday, then will see off and on
chances of showers and thunderstorms Sunday night through the day
Wednesday as the surface low/boundary moves over the region and
basically stalls there. The system finally pushes east Wednesday
night into Thursday, bringing cooler conditions and lesser chances
for precipitation.

Under the influence of the upper ridge, high temperatures will be in
the lower to mid 90s Saturday and Sunday. Will then see a gradual
cooling trend, with mid to upper 80s Monday, lower to mid 80s
Tuesday, and upper 70s to lower 80s Wednesday and Thursday.
Overnight lows in the upper 50s to mid 60s will be common.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday Afternoon)
Issued at 1240 PM CDT Thu May 24 2018

VFR conditions are expected through the period, the possible
exception being during thunderstorms if they manage to develop
over the ABR and/or ATY sites. Best chance for thunderstorms will
be this afternoon/evening.

&&

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

SHORT TERM...Lueck
LONG TERM...Parkin
AVIATION...Lueck

Hazardous Weather Outlook
National Weather Service Aberdeen SD
420 AM CDT Thu May 24 2018

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-250930-
Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-
Roberts-Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-
Codington-Grant-Hamlin-Deuel-Stanley-Sully-Hughes-Hyde-Hand-Jones-
Lyman-Buffalo-
420 AM CDT Thu May 24 2018 /320 AM MDT Thu May 24 2018/

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

.DAY ONE...Today and Tonight

Thunderstorms are possible again this afternoon and evening,
mainly east of the Missouri River. Some storms could be strong to
severe with large hail and strong winds, especially across
northeast South Dakota and west central Minnesota.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

On and off thunderstorm chances are in the forecast this weekend
into early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be necessary this afternoon and evening
east of the Missouri River.

TMT

Special Weather Statement
National Weather Service Aberdeen SD
511 PM CDT THU MAY 24 2018

SDZ048-242245-
Lyman SD-
511 PM CDT THU MAY 24 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LYMAN COUNTY UNTIL 545 PM
CDT...

At 510 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Hamill, or 20 miles west of Chamberlain, moving
northeast at 20 mph.

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

Locations impacted include...
Lyman and Lake Francis Case.

LAT...LON 4374 9962 4374 9964 4377 9965 4373 9967
      4375 9968 4376 9968 4376 9969 4372 9972
      4375 9974 4374 9976 4371 9975 4369 9984
      4370 9986 4367 9987 4370 9990 4370 9994
      4381 9984 4390 9972 4378 9945 4360 9962
TIME...MOT...LOC 2210Z 223DEG 19KT 4373 9972

Telken