Severe Thunderstorm Warning 321, NWS North Platte, NE

779 
WWUS53 KLBF 270456
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1156 PM CDT Wed Aug 26 2020

NEC005-075-091-117-270530-
/O.CON.KLBF.SV.W.0321.000000T0000Z-200827T0530Z/
Arthur NE-Grant NE-Hooker NE-McPherson NE-
1156 PM CDT Wed Aug 26 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM
CDT/1130 PM MDT/ FOR NORTHEASTERN ARTHUR...SOUTHEASTERN GRANT...
SOUTHWESTERN HOOKER AND NORTHWESTERN MCPHERSON COUNTIES...

At 1156 PM CDT/1056 PM MDT/, a severe thunderstorm was located 12
miles south of Whitman, or 21 miles north of Arthur, moving southeast
at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Carr Lake, Green Lake, Lena, Sand Puddin Lake, Pratt Lake, Spring
Valley Lake, Cogill Lake and East Cody Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4203 10144 4176 10113 4164 10166 4198 10169
TIME...MOT...LOC 0456Z 329DEG 16KT 4186 10154 

HAIL...1.00IN
WIND...60MPH
 
$$

Kulik

077 
WWUS53 KLBF 270512
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
1212 AM CDT Thu Aug 27 2020

NEC005-075-091-117-270521-
/O.CAN.KLBF.SV.W.0321.000000T0000Z-200827T0530Z/
Arthur NE-Grant NE-Hooker NE-McPherson NE-
1212 AM CDT Thu Aug 27 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ARTHUR...
SOUTHEASTERN GRANT...SOUTHWESTERN HOOKER AND NORTHWESTERN MCPHERSON
COUNTIES IS CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 4203 10144 4176 10113 4164 10166 4198 10169
TIME...MOT...LOC 0508Z 330DEG 22KT 4178 10148 

$$

Roberg

Area Forecast Discussion
National Weather Service North Platte NE
707 PM CDT Wed Aug 26 2020

.SYNOPSIS...
Issued at 324 PM CDT Wed Aug 26 2020

H5 analysis from earlier this morning had high pressure
anchored over the Four Corners and a secondary area of high pressure
was located over western Georgia. A low amplitude ridge of high
pressure extended north of these two features into the upper
Mississippi valley. Further west, a trough of low pressure extended
from the Oregon coastline, south southwest to a point approximately
700 miles off the central California coast. A strong low was located
over eastern Quebec with a trough extending south toward Bermuda.
Hurricane Laura was approximately 200 miles southeast of the mouth
of the Sabine river. At the surface, a weak frontal boundary
extended from the western Nebraska Panhandle into northeastern South
Dakota. Winds behind this boundary were northerly, while south of
the boundary, winds were either southwesterly or southerly. Skies
remained mostly clear this afternoon, with a few higher clouds in
western portions of the forecast area. Temperatures as of 2 PM CT
ranged from 91 at Gordon to 98 at Thedford.

&&

.SHORT TERM...(This evening through Thursday night)
Issued at 324 PM CDT Wed Aug 26 2020

The main forecast
challenges in the next 36 hours are precipitation chances tonight,
then again on Thursday night. Over the next 24 hours, there will be
a gradual weakening of the persistent ridging across the northern
plains and northern Rockies. This will allow shortwaves to enter the
Dakotas Thursday into Thursday night, increasing the threat for
thunderstorms (more on this later). For tonight, there was some
indication with this morning's HRRR of thunderstorm development in
the panhandle late this afternoon into the evening hours. Some of
this activity was progged to move into the northwestern forecast
area early this evening, then dissipate. The 12z NAM12 and NAMNest
develop some limited convection off to the west of the forecast area
and dissipate it before it reaches the western forecast area. As has
been the case in this regime the past few days, the HRRR is the most
"ambitious" with development of precipitation with its morning runs,
then it backs off of it as you trend into the afternoon hours. The
same thing is occurring right now as the latest 18z HRRR develops
convection over the Cheyenne ridge which never makes it into the
eastern panhandle. This model trend was echoed by the NAM12 and
NAMNest from this morning which are dry for us tonight. That being
said, decided to strip out pops in the NW Sandhills for tonight and
keep them confined to the eastern panhandle. With respect to the
weak frontal boundary which is currently draped across the northern
forecast area. This feature is expected to lift slowly north as a
warm front Thursday morning, becoming oriented across far Southern
South Dakota by 21z Thursday. Late in the day Thursday, a northern
stream disturbance will track from Montana into North Dakota. This
will force the frontal boundary south into northern Nebraska
Thursday evening increasing the threat for thunderstorms in the
Dakotas and northern Nebraska. A decent low level jet will develop
Thursday night from central Nebraska into northeast Nebraska. The
nose of this feature will extend across northern Nebraska. Larger
scale forcing will be even stronger across South Dakota Thursday
night and am expecting the best chances for pcpn to be north of the
forecast area with some chances in northern portions of the forecast
area. Unfortunately, given weak forcing further south, pcpn chances
are going to be minimal along and south of Interstate 80. As for
highs Thursday, I went ahead and increased them some over guidance
in northern Nebraska given the expected location of the surface
front over southern South Dakota late in the afternoon.

.LONG TERM...(Friday through Wednesday)
Issued at 324 PM CDT Wed Aug 26 2020

The cool front will be
pushed south into Kansas Friday resulting in cooler and drier
conditions across western and north central Nebraska. The threat
for precipitation will increase Saturday into Saturday night as mid
level warm air advection and a surface warm front lifts across the
area. Temperatures will warm back to more seasonal levels Sunday
behind the warm front with highs in the mid 80s to lower 90s. This
brief warmup will be followed by the threat for thunderstorms Sunday
night as a strong cold front tracks through the forecast area.
Behind the front, highs Monday and Tuesday will be in the 70s, with
upper 70s to lower 80s for Wednesday.

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
Issued at 706 PM CDT Wed Aug 26 2020

Fairly quiet aviation conditions are expected across the region
through Thursday afternoon. There is a low chance of some
thunderstorms across northern Nebraska Thursday evening. Confidence
remains low in development at this time and any thunderstorms that
do develop will only impact KVTN mainly after 00Z Friday.

&&

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

SYNOPSIS...Buttler
SHORT TERM...Buttler
LONG TERM...Buttler
AVIATION...Kulik

Hazardous Weather Outlook
National Weather Service North Platte NE
233 PM CDT Wed Aug 26 2020

NEZ004>010-022>029-035>038-056>059-069>071-094-271945-
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-
233 PM CDT Wed Aug 26 2020 /133 PM MDT Wed Aug 26 2020/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

The hot weather continues this afternoon with heat index values
in the upper 90s across southwest into north central Nebraska.
A marginal risk for a severe storm or two exists for tonight
north of a line from Oshkosh to Springview near a weak frontal
boundary.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

On Thursday, an incoming cold front from South Dakota will be a
focus for a few strong to severe storms to develop Thursday
evening. A slight risk for severe storms exists across north
central Nebraska, with a marginal risk extending south to near
Interstate 80.

Scattered thunderstorm chances will continue Friday through
Tuesday across the outlook area. At this time, the threat for
severe storms is uncertain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation should not be needed through tonight.

&&

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

Taylor

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
910 PM CDT WED AUG 26 2020

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

0906 PM     HAIL             3 N NENZEL              42.97N 101.10W
08/26/2020  M1.75 INCH       CHERRY             NE   TRAINED SPOTTER

            GOLF BALL SIZED HAIL. A LITTLE BREEZY BUT NO SIGNIFICANT
            WINDS.

&&

RLAMB

Special Weather Statement
National Weather Service North Platte NE
1016 PM CDT Wed Aug 26 2020

NEZ005-094-270415-
Eastern Cherry NE-Western Cherry NE-
1016 PM CDT Wed Aug 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHERRY COUNTY UNTIL
1115 PM CDT/1015 PM MDT/...

At 1016 PM CDT/916 PM MDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 6 miles west of Valentine
National Wildlife Refuge to 22 miles south of Medicine Lake. Movement
was southeast at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Brownlee, Valentine National Wildlife Refuge, Highway 97 crossing the
North Loup River, Marsh Flat, Speckel Meir Lake, Highway 97 crossing
Big Creek, Sevenmile Hill, Highway 83 crossing Goose Creek and
Highway 83 crossing the North Loup River.

This includes the following highways...
 Highway 97 between mile markers 75 and 110.
 Highway 83 between mile markers 169 and 188.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4230 10028 4211 10126 4247 10151 4262 10061
TIME...MOT...LOC 0316Z 318DEG 23KT 4254 10072 4241 10136

Kulik

Special Weather Statement
National Weather Service North Platte NE
1052 PM CDT Wed Aug 26 2020

NEZ023>025-094-270445-
Hooker NE-Grant NE-Western Cherry NE-Thomas NE-
1052 PM CDT Wed Aug 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL CHERRY...
NORTHEASTERN GRANT...NORTHERN HOOKER AND NORTHWESTERN THOMAS COUNTIES
UNTIL 1145 PM CDT/1045 PM MDT/...

At 1052 PM CDT/952 PM MDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 16 miles north of Mullen to
11 miles northwest of Whitman. Movement was south at 20 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Mullen, Seneca, Whitman, Carr Lake, Duluth, Marsh Flat, Hire, Whitman
Road crossing the North Branch of the Middle Loup River, Giant Hill,
Highway 97 crossing Big Creek, Sevenmile Hill, Hecla, Kelso and Weir.

This includes the following highways...
 Highway 2 between mile markers 148 and 197.
 Highway 61 between mile markers 164 and 176.
 Highway 97 between mile markers 64 and 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4203 10076 4190 10170 4222 10180 4238 10095
TIME...MOT...LOC 0352Z 342DEG 19KT 4228 10101 4218 10168

Kulik