Special Weather Statement, NWS North Platte, NE

Area Forecast Discussion
National Weather Service North Platte NE
342 AM CDT Thu Jun 28 2018

.SHORT TERM...(Today and tonight)
Issued at 333 AM CDT Thu Jun 28 2018

Hot weather is expected today. Very warm air aloft will overspread
the region from the southwest ahead a shortwave trough that will be
digging into the Pacific Northwest. A warm front will extend across
southern NE this morning, lifting north through the day and be
located across northern NE by early this evening. Very humid
conditions (70s to near 80F surface dew points) will be in place
to the north of the front from eastern into northern Nebraska. It
will be somewhat cooler temperature wise north of the front, but the
humidity will push heat index readings over 100F. Across southwest
NE hot and drier air will be in place to the south of the
warm front. Highs will likely surpass 100F across southwest NE to
the south of the warm front this afternoon. Will issue a heat
advisory for portions of the area where heat index readings will
surpass 100F. An extremely unstable and sheared environment will be
in place to the north of the warm front, but a very strong cap
should suppress any convective development.

A warm night is in the cards for tonight as a southerly LLJ keeps
the boundary layer well mixed. Lows should hold above 70F at many
locations, with warm mid 70s across portions of north central NE.

.LONG TERM...(Friday through Wednesday)
Issued at 333 AM CDT Thu Jun 28 2018

As the Pacific North west shortwave progresses toward the Northern
Plains on Friday, expect a cold front to move into northern NE.
Appears the cap will hold and shouldn't see any storm development
along the front during the afternoon. Friday night a southerly
LLJ should force at least scattered thunderstorm development near
and north of the front across parts of northern and northwest NE.
Prefer the slower frontal passage solutions shown in the
NAM/GFS/SREF, with cold front slowly moving southeast across eastern
portions of north central into central NE Saturday morning.
Scattered showers and thunderstorms will be possible Saturday as
temperatures aloft cool in the post frontal environment. Highs
should mainly be around 80F Saturday behind the front.

Surface high pressure builds in Saturday night with drier and cooler
air (lows mid 50s to lower 60s). As the surface high moves east of
the area Sunday, return southerly flow will develop, with highs
reaching the mid 80s.

Southwest flow aloft looks to dominate the first of next week. Upper
level high pressure across the southeast CONUS will slowly expand
west toward the Southern Plains by mid week. A couple of weak
disturbances within the flow could ignite a couple of thunderstorms,
but nothing looks to be organized at this time. Otherwise heating
up again, with highs into the 90s.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1130 PM CDT Wed Jun 27 2018

Regional radar display shows isolated storms in northeast CO that
weaken as they progress eastward over the last 2-3 hours.
Meanwhile, latest satellite imagery shows just high clouds from
earlier thunderstorms moving into far western NEB. The main
concerns the next 24 hours include potential for isolated
thunderstorm late tonight and patchy fog late tonight-early
morning tomorrow. The latter across portions of southwest NEB and
the southern Sandhills. Further, BR was added to the KLBF TAF
with visibilities down to MVFR at this time along with low
ceilings. Patchy fog was added due to the low-level moisture in
place, the small dew point depression with high dew points, and
generally light winds. Otherwise, confidence in thunderstorms late
tonight has decreased based on recent trends and hi-res guidance
so no mention in either the KLBF or KVTN TAFs this package. Clouds
should increase across the local forecast area rest of tonight
with clouds then decreasing early tomorrow. Meanwhile, winds will
become southeast-south tomorrow with peak gusts in the afternoon
up to 25 kts anticipated across portions of northern NEB. There
could be marginal LLWS conditions tomorrow night given southerly
LLJ so that will need to be monitored.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from noon CDT /11 AM MDT/ today to 8 PM CDT /7 PM
MDT/ this evening for NEZ005>010-022-025>029-035>038-056>059-
069>071.

&&

SHORT TERM...Taylor
LONG TERM...Taylor
AVIATION...ET

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Special Weather Statement
National Weather Service North Platte NE
1243 AM MDT THU JUN 28 2018

NEZ058-069-280730-
Chase NE-Perkins NE-
1243 AM MDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PERKINS AND
NORTHWESTERN CHASE COUNTIES UNTIL 130 AM MDT...

At 1243 AM MDT, Doppler radar was tracking a strong thunderstorm near
Sixteen-Mile Corner, or 14 miles south of Julesburg, moving east at
20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Grant, Venango, Brandon and Wild Horse Spring.

This includes Highway 61 between mile markers 68 and 72.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 4068 10205 4089 10205 4092 10172 4065 10171
TIME...MOT...LOC 0643Z 268DEG 19KT 4078 10217

CDC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
242 AM CDT THU JUN 28 2018

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

0235 AM     DENSE FOG        SUTHERLAND              41.16N 101.13W
06/28/2018                   LINCOLN            NE   TRAINED SPOTTER

            VISIBILITY 1/4 MILE OR LESS

&&

CCOLE

Special Weather Statement
National Weather Service North Platte NE
353 AM CDT THU JUN 28 2018

NEZ005-008-024>026-094-280945-
Brown NE-Hooker NE-Eastern Cherry NE-Western Cherry NE-Blaine NE-
Thomas NE-
353 AM CDT THU JUN 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHERRY...
NORTHEASTERN HOOKER...SOUTHWESTERN BROWN...NORTHWESTERN BLAINE AND
NORTHERN THOMAS COUNTIES UNTIL 445 AM CDT/345 AM MDT/...

At 353 AM CDT/253 AM MDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 10 miles northwest of
Elsmere to near Mullen. Movement was east at 20 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Seneca, Elsmere, Purdum, Brownlee, Moon Lake, Giant Hill, Willow Lake
State Wildlife Management Area, Long Lake State Wildlife Management
Area, Kelso and Highway 83 crossing the North Loup River.

This includes the following highways...
 Highway 2 between mile markers 188 and 189.
 Highway 97 between mile markers 68 and 69.
 Highway 83 between mile markers 153 and 174.

LAT...LON 4234 9991 4201 10023 4205 10108 4243 10039
TIME...MOT...LOC 0853Z 257DEG 18KT 4225 10035 4207 10095

CDC