Damaging Wind in Wyoming, July 27, 2018

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
529 PM MDT Fri Jul 27 2018

.DISCUSSION...(This Evening Through Friday)
Issued at 302 PM MDT Fri Jul 27 2018

Current surface analysis shows nearly stationary frontal boundary
remaining south and west of the forecast area, generally from the
Northern Rockies to the central high Plains to the Southern
Plains. High pressure is in place over southeast SK. Upper level
analysis continues to show large trough covering the eastern US,
with high pressure over the desert southwest. Northwest flow
persists over the Northern Plains, with disturbances noted in
water vapor imagery from the Northern Rockies to the Central
Plains. Skies are variably cloudy this afternoon, with KUDX radar
showing isolated to scattered showers and storms across much of
the area. Temps are on the cool side, mostly in the 70s, with
light winds.

A unsettled and cool pattern can be expected through the weekend,
with daily chances for showers and storms. A warmer and drier
pattern will develop early next week as a ridge builds just to the
west of the region.

For late today into tonight, scattered to numerous showers and
storms are expected in most areas, especially from northeast WY to
the Black Hills and southwest SD. The threat for isolated strong to
severe storms will be mainly confined to areas from northeast WY to
the Black Hills and southwest SD late this afternoon into the
evening. Stronger storms would contain gusty winds and hail, along
with at least brief heavy rainfall. Isolated to scattered activity
will linger overnight into Saturday morning in many areas. Lows
tonight will mostly be in the 50s.

Saturday and Sunday will be fairly similar to today, though the risk
for severe storms will be minimal, especially by Sunday. Highs will
be in the 70s across the plains, 60s over much of the Black Hills.
Showers and storms will be most numerous in the afternoon and
evening, with the best chances continuing to be from northeast WY to
southwest SD.

The upper trough will finally start to shift east of the region
early next week as a ridge builds over the western US. Mainly dry
and warmer weather will develop and is expected through much of the
week. Highs will be back to near average levels, mostly in the 80s,
from Tuesday through Friday.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Saturday Evening)
Issued At 528 PM MDT Fri Jul 27 2018

Scattered showers and storms will move through areas mainly from
northeast WY to southwest SD. The strongest and most numerous
activity through the early evening will be across the Black Hills
into southwest SD. Brief MVFR/IFR conditions can be expected with
the stronger storms, along with hail, gusty winds, and heavy
rainfall. Isolated to scattered showers and storms will continue
to track across the area overnight into Saturday morning. Another
round of showers and thunderstorms are expected to develop
Saturday afternoon, especially from far northeast WY through the
Black Hills area.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

DISCUSSION...26
AVIATION...26

Hazardous Weather Outlook
National Weather Service Rapid City SD
527 AM MDT Fri Jul 27 2018

SDZ024>030-041-042-044-072-074-WYZ054>058-071-281300-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Fall River-Oglala Lakota-Bennett-
Sturgis/Piedmont Foot Hills-Hermosa Foot Hills-Northern Campbell-
Southern Campbell-Western Crook-Wyoming Black Hills-Weston-
Northeastern Crook-
527 AM MDT Fri Jul 27 2018

This Hazardous Weather Outlook is for portions of northwestern
South Dakota...southwestern South Dakota...the Black Hills of
South Dakota...northeast Wyoming...and the Black Hills of
Wyoming.

.DAY ONE...Today and Tonight

Scattered thunderstorms will move across the area today. There is
a marginal risk for severe thunderstorms with large hail and
damaging winds.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

An active weather pattern will bring daily chances for showers
and thunderstorms through the weekend. Severe thunderstorms are
not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ001-002-012>014-031-032-043-046-047-049-073-281300-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Pennington Co Plains-Haakon-Jackson-Mellette-Todd-Tripp-
Southern Meade Co Plains-
527 AM MDT Fri Jul 27 2018 /627 AM CDT Fri Jul 27 2018/

This Hazardous Weather Outlook is for portions of western South
Dakota.

.DAY ONE...Today and Tonight

Scattered thunderstorms will move across the area today. Severe
thunderstorms are not expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

An active weather pattern will bring daily chances for showers
and thunderstorms through the weekend. Severe thunderstorms are
not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
735 PM MDT FRI JUL 27 2018

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

0734 PM     HAIL             1 S OGLALA              43.17N 102.73W
07/27/2018  E1.75 INCH       OGLALA LAKOTA      SD   TRAINED SPOTTER

0734 PM     TSTM WND GST     1 S OGLALA              43.17N 102.73W
07/27/2018  E60 MPH          OGLALA LAKOTA      SD   TRAINED SPOTTER

&&

ME

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
747 PM MDT FRI JUL 27 2018

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

0746 PM     HAIL             6 SE OGLALA             43.12N 102.65W
07/27/2018  E3.25 INCH       OGLALA LAKOTA      SD   TRAINED SPOTTER

&&

ME

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
749 PM MDT FRI JUL 27 2018

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

0735 PM     HAIL             1 NE OGLALA             43.19N 102.72W
07/27/2018  M1.50 INCH       OGLALA LAKOTA      SD   PUBLIC

&&

ARK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
750 PM MDT FRI JUL 27 2018

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

0438 PM     TSTM WND DMG     5 WNW TERRY PEAK        44.37N 103.92W
07/27/2018                   LAWRENCE           SD   LAW ENFORCEMENT

            SEVERAL TREES DOWN IN SPEARFISH CANYON

&&

JC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
800 PM MDT FRI JUL 27 2018

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

0759 PM     HAIL             1 ESE PINE RIDGE        43.02N 102.54W
07/27/2018  E1.00 INCH       OGLALA LAKOTA      SD   TRAINED SPOTTER

0759 PM     TSTM WND GST     1 ESE PINE RIDGE        43.02N 102.54W
07/27/2018  E70 MPH          OGLALA LAKOTA      SD   TRAINED SPOTTER

&&

ME

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
802 PM MDT FRI JUL 27 2018

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

0755 PM     HAIL             PINE RIDGE              43.02N 102.56W
07/27/2018  E1.75 INCH       OGLALA LAKOTA      SD   TRAINED SPOTTER

&&

ME