Special Weather Statement, NWS North Platte, NE

Area Forecast Discussion
National Weather Service North Platte NE
315 AM CDT Fri Oct 6 2017

.SHORT TERM...(Today and tonight)
Issued at 315 AM CDT Fri Oct 6 2017

A fairly prolific area of showers and thunderstorms is underway and
the HRRR shows this activity continuing throughout the day and
ending late tonight. The HRRR and RAP K-indices suggest the
thunderstorm activity would continue throughout the day also.

The rain forecast follows the model consensus which suggests highest
rain totals around an inch today. The temperature forecast today and
tonight is a blend of the previous forecast plus blended bias
corrected guidance for highs in the 50s to lower 60s.

Dry air will be moving in aloft tonight and this will set the stage
for fog development. Winds aloft, 850mb-700mb, will be strong,
around 30kt and this will hinder moisture pooling for widespread
fog. The forecast follows the model consensus for patchy fog.

.LONG TERM...(Saturday through Thursday)
Issued at 315 AM CDT Fri Oct 6 2017

High pressure and drier weather returns for the weekend.
Temperatures will return into the mid 70s on Saturday with slightly
cooler temperatures on Sunday (low to upper 60s).

The next chance of precipitation arrives on Sunday night as a cold
front drops south across the region. While most precipitation
associated with this front will remain all rain across the forecast
area, much colder air will move in behind the front. This colder air
could change some of the rain across the Pine Ridge region
(northwest of a line from Antioch to Merriman) into a rain/snow mix
early Monday morning. Accumulations will be limited if at all as
ground temperatures remain fairly warm.

The cold front will quickly move eastward by Monday evening with
high pressure building back into the region. Dry weather will
continue through next Friday. With mostly clear skies and overnight
temperatures dropping into the upper 20s and low 30s, have added
frost to the forecast for Monday and Tuesday nights. The best chance
for frost both nights will be northwest of a Ogallala to Springview
line. Frost chances during the overnight hours will diminish as
temperatures continue to rise throughout the week. Daytime high
temperatures will steadily rise throughout the week starting in the
upper 40s to low 50s on Monday. High temperatures by Friday will be
in the upper 60s to low 70s.

&&

.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1220 AM CDT Fri Oct 6 2017

Upper level trough to the west of the Rockies will swing east
with an increase in mid level ascent overnight. This combined with
ample moisture/low level warm air advection will increase chances
of precipitation overnight across west central Nebraska. The latest
bufr sounding indicate some elevated instability will persist for
much of the night, with occasional thunderstorms embedded in the
showers continuing as well. Ceilings are lowering to IFR and in some
cases reaching airport minimums with the potential of local dense
fog, especially from KLBF and points south. The prospects of fog are
not certain, kept visibilities at 1sm or greater at this time as
some dense fog is materializing over northern Kansas with some
models indicating that it could continue to travel north.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...CDC
LONG TERM...Kulik
AVIATION...Allen

Hazardous Weather Outlook
National Weather Service North Platte NE
420 AM CDT Fri Oct 6 2017

NEZ004>010-022>029-035>038-056>059-069>071-094-070930-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
420 AM CDT Fri Oct 6 2017 /320 AM MDT Fri Oct 6 2017/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...TODAY AND TONIGHT.

Scattered thunderstorms are expected today. Isolated strong storms
capable of locally heavy rainfall and small hail are possible.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

Frost and hard freeze conditions are likely Tuesday morning
across much of western and north central Nebraska.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

Special Weather Statement
National Weather Service North Platte NE
333 AM CDT FRI OCT 6 2017

NEZ037-059-060915-
Lincoln NE-Logan NE-
333 AM CDT FRI OCT 6 2017

...SPECIAL WEATHER STATEMENT...

At 333 AM CDT, Doppler radar was tracking a strong thunderstorm 11
miles north of North Platte Airport, or 12 miles northeast of North
Platte, moving northeast at 30 mph.

Half inch hail and 1 inch of rainfall will be possible with this
storm.

Locations impacted include...
Gandy, Hoagland and Tarboz Lake.

This includes the following highways...
 Highway 92 between mile markers 233 and 244.
 Highway 83 between mile markers 92 and 112.

LAT...LON 4123 10072 4137 10077 4153 10038 4136 10023
      4134 10024
TIME...MOT...LOC 0833Z 244DEG 25KT 4130 10067

CDC

Special Weather Statement
National Weather Service North Platte NE
359 AM CDT FRI OCT 6 2017

NEZ037-038-059-060945-
Custer NE-Lincoln NE-Logan NE-
359 AM CDT FRI OCT 6 2017

...SPECIAL WEATHER STATEMENT...

At 359 AM CDT, Doppler radar was tracking a strong thunderstorm 13
miles south of Gandy, or 14 miles southeast of Stapleton, moving east
at 30 mph.

Half inch hail and around 1 inch of rainfall will be possible with
this storm.

Locations impacted include...
Arnold, Callaway, Finchville and Milldale.

This includes the following highways...
 Highway 92 between mile markers 239 and 254.
 Highway 83 near mile marker 106.

LAT...LON 4122 10050 4140 10053 4148 10001 4121 9989
TIME...MOT...LOC 0859Z 262DEG 26KT 4129 10040

CDC

Special Weather Statement
National Weather Service North Platte NE
405 AM CDT FRI OCT 6 2017

NEZ037-038-059-060945-
Custer NE-Lincoln NE-Logan NE-
405 AM CDT FRI OCT 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LINCOLN...
SOUTHEASTERN LOGAN AND WEST CENTRAL CUSTER COUNTIES UNTIL 445 AM
CDT...

At 405 AM CDT, Doppler radar was tracking a strong thunderstorm 11
miles southwest of Arnold, or 15 miles southeast of Stapleton, moving
east at 30 mph.

Dime size hail and one and one-half inches of rainfall will be
possible with this storm.

Locations impacted include...
Arnold, Callaway, Finchville and Milldale.

This includes the following highways...
 Highway 92 between mile markers 239 and 254.
 Highway 83 near mile marker 106.

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.

&&

LAT...LON 4122 10050 4140 10053 4148 10001 4121 9989
TIME...MOT...LOC 0905Z 262DEG 26KT 4129 10034

CDC

Special Weather Statement
National Weather Service North Platte NE
429 AM CDT FRI OCT 6 2017

NEZ038-061015-
Custer NE-
429 AM CDT FRI OCT 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CUSTER COUNTY UNTIL
515 AM CDT...

At 429 AM CDT, Doppler radar was tracking a strong thunderstorm near
Arnold, or 22 miles east of Stapleton, moving east at 35 mph.

Nickel size hail and 1 to 2 inches of rainfall will be possible with
this storm.

Locations impacted include...
Broken Bow, Arnold, Merna, Anselmo, Victoria Springs State Recreation
Area, Lillian, Pleasant Hill, Milldale and Finchville.

This includes the following highways...
 Highway 2 between mile markers 256 and 279.
 Highway 92 between mile markers 247 and 273.

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.

&&

LAT...LON 4170 9975 4153 9946 4139 9964 4128 10023
      4153 10024
TIME...MOT...LOC 0929Z 249DEG 31KT 4138 10010

CDC

Special Weather Statement
National Weather Service North Platte NE
507 AM CDT FRI OCT 6 2017

NEZ038-061045-
Custer NE-
507 AM CDT FRI OCT 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CUSTER COUNTY UNTIL
545 AM CDT...

At 506 AM CDT, Doppler radar was tracking a strong thunderstorm near
Merna, or 7 miles northwest of Broken Bow, moving east at 35 mph.

1 inch of rainfall in 30 minutes or less is expected with this storm
along with dime size hail.

Locations impacted include...
Sargent, Merna, Anselmo, Comstock, Victoria Springs State Recreation
Area, Lillian, Round Valley, Walworth, Big Oak Canyon, Divide Hill,
Wescott and Gates.

This includes the following highways...
 Highway 183 between mile markers 105 and 120.
 Highway 2 between mile markers 259 and 273.
 Highway 92 between mile markers 269 and 273.

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.

&&

LAT...LON 4173 9922 4153 9921 4141 9984 4172 9988
TIME...MOT...LOC 1006Z 251DEG 29KT 4150 9970

CDC

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