Severe Thunderstorm Warning 63, NWS Amarillo, TX

414 
WWUS54 KAMA 180021
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
721 PM CDT THU MAY 17 2018

TXC341-180029-
/O.CAN.KAMA.SV.W.0063.000000T0000Z-180518T0100Z/
Moore TX-
721 PM CDT THU MAY 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MOORE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
the Panhandle of Texas.

LAT...LON 3585 10162 3593 10126 3562 10122 3562 10162
TIME...MOT...LOC 0019Z 255DEG 15KT 3571 10155 

$$

TXC233-180100-
/O.CON.KAMA.SV.W.0063.000000T0000Z-180518T0100Z/
Hutchinson TX-
721 PM CDT THU MAY 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN HUTCHINSON COUNTY...

At 719 PM CDT, a severe thunderstorm was located over Sanford, or 8
miles west of Borger, moving east at 20 mph.

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

SOURCE...Radar indicated. 

IMPACT...Minor damage to roofs, siding, and trees is possible. Hail 
         damage to vehicles is expected. Hail may accumulate on 
         roadways causing hazardous travel. 

Locations impacted include...
Borger, Fritch, Stinnett and Sanford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3585 10162 3593 10126 3562 10122 3562 10162
TIME...MOT...LOC 0019Z 255DEG 15KT 3571 10155 

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

Ward

838 
WWUS54 KAMA 180032
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
732 PM CDT THU MAY 17 2018

TXC233-180100-
/O.CON.KAMA.SV.W.0063.000000T0000Z-180518T0100Z/
Hutchinson TX-
732 PM CDT THU MAY 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN HUTCHINSON COUNTY...

At 731 PM CDT, a severe thunderstorm was located over Sanford, or 8
miles northwest of Borger, moving east at 20 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to roofs, siding, and trees is possible. 
         People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. 

Locations impacted include...
Borger, Stinnett and Sanford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3577 10158 3593 10126 3562 10122 3566 10158
TIME...MOT...LOC 0031Z 261DEG 16KT 3571 10153 

HAIL...1.50IN
WIND...60MPH
 
$$

Ward

065 
WWUS54 KAMA 180037
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
737 PM CDT THU MAY 17 2018

TXC233-180100-
/O.CON.KAMA.SV.W.0063.000000T0000Z-180518T0100Z/
Hutchinson TX-
737 PM CDT THU MAY 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHWESTERN HUTCHINSON COUNTY...

At 736 PM CDT, a severe thunderstorm was located over Sanford, or 6
miles northwest of Borger, moving east at 25 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Trained weather spotters reported golf ball size hail 
         between Fritch and Sanford around 7:04 PM CDT. 

IMPACT...Minor damage to roofs, siding, and trees is possible. 
         People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. 

Locations impacted include...
Borger, Stinnett and Sanford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 3577 10155 3593 10126 3562 10122 3566 10158
TIME...MOT...LOC 0036Z 254DEG 20KT 3572 10150 

HAIL...1.75IN
WIND...60MPH
 
$$

Ward

674 
WWUS54 KAMA 180044
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
744 PM CDT THU MAY 17 2018

TXC233-180100-
/O.CON.KAMA.SV.W.0063.000000T0000Z-180518T0100Z/
Hutchinson TX-
744 PM CDT THU MAY 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTH CENTRAL HUTCHINSON COUNTY...

At 744 PM CDT, a severe thunderstorm was located 4 miles north of
Borger, moving east at 25 mph.

HAZARD...Tennis ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to roofs, siding, and trees is possible. 
         People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. 

Locations impacted include...
Borger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

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

&&

LAT...LON 3577 10149 3591 10126 3562 10122 3566 10150
TIME...MOT...LOC 0044Z 257DEG 21KT 3572 10143 

HAIL...2.50IN
WIND...60MPH
 
$$

Ward

Area Forecast Discussion
National Weather Service Amarillo TX
605 PM CDT Thu May 17 2018

.AVIATION...
00Z TAF Cycle

Showers and thunderstorms will be possible mainly at the Amarillo
and Guymon TAF sites through 02Z to 03Z Friday. Wind gusts to 40
to 45 knots can be expected at both TAF sites. VFR conditions can
be expected at all three TAF sites except for some MVFR conditions
in and near any thunderstorms. Southeast to south winds 15 to 25
knots with gusts near 30 knots at all three TAF sites through 00Z
Saturday.

Schneider

&&

.PREV DISCUSSION... /Issued 401 PM CDT Thu May 17 2018/

DISCUSSION...
Latest water vapor channel reveals shortwave emanating from
upstream trough over central NV, as ridge axis continues to shift
east into western OK. At the surface, a dryline is sharpening with
50s dew points from Clovis to Dalhart and increasingly backed
winds east of dryline. Storms are initiating in the western South
Plains where a bulge in the dryline exist, with a few radar
returns showing up in the far western Texas Panhandle. An 18z
KAMA sounding showed SBCAPE around 2600 J/kg with a relatively
weak CAP. MLCAPE was sampled at 1300 J/kg with a lot more CIN (160
J/kg) mainly due to the EML in place. LCL heights of 2000m along
the dryline may decrease to around 1500m during the evening. The
combination of stronger mid-level southwest flow overspreading
the area and a 30-40kt low level jet increasing during the evening
will result in 10 to 20 knots of 0-1 km shear. Effective deep
layer shear of around 40-50kts is expected during the late
afternoon and early evening. Moreover, supercells with very large
hail and strong winds should be the primary threat through early
evening. Any supercell that can remain discrete into the evening
will have some potential to produce an isolated tornado. This
will depend on whether or not there is sufficient moisture and
cooling to at least locally reduce LCL heights, while storms
remain surface based to ingest low level SRH. Given the high based
nature of most storms today and DCAPE values upwards of 1500 J/kg
along with steep low/mid level lapse rates, strong downburst
winds can't be ruled out, especially if storms become more linear
in the evening. Storms should be out of the area by 02z to 04z.
However, some redevelopment is possible overnight where theta-e
advection stays stronger in the eastern Panhandles. Severe weather
is not currently expected with any redevelopment overnight.

The upper low continues its track east on Friday then begins to
stall as an open wave over the Rocky Mountains. The dryline is
progged to push further east with a stronger cap being suggested
in the guidance. Storm initiation looks less widespread compared
to Thursday, but did include slight pops for the eastern
Panhandles. Any storm would again have plenty of instability and
modest shear to work with, so an isolated severe storm is
possible. A cold front is progged to move through the area
Saturday. Model to model consistency is reasonable based on the
12z runs today, which suggest the front will move through most of
the area by Saturday evening. That being said, being that the
synoptic push for this is limited to a developing shortwave over
the central Plains, not completely convinced that this front won't
stall in the area providing forcing for additional storms over
the weekend. Storm chances continue next week with return flow
being maintained as broad cyclonic flow remains in place over the
western CONUS.

Ward

FIRE WEATHER...
Elevated to critical fire weather conditions are possible Friday
afternoon for the far western Panhandles with drier conditions and
breezy southwest winds. Haines index of 5 to 6 can also be
expected.

Ward

&&

.AMA Watches/Warnings/Advisories...
TX...None.
OK...None.

&&

11/11

Hazardous Weather Outlook
National Weather Service Amarillo TX
429 PM CDT Thu May 17 2018

OKZ001>003-TXZ001>020-317-180930-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
429 PM CDT Thu May 17 2018

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Tonight.

Thunderstorms are expected across much of the area this evening.
Some storms that develop will have the potential to become strong
to severe. The main threats will be large to very large hail and
winds up to around 65 MPH. Heavy rains can also be expected with
the stronger storms, possibly leading to localized flooding or
flash flooding. An isolated tornado can't be ruled out.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Thunderstorms will be possible Friday through Wednesday across
much of the Oklahoma and Texas Panhandles. Some storms that
develop will have the potential to become strong to severe,
with the main hazards being large hail and strong winds.

Elevated to critical fire weather conditions may develop on
Friday across the western half of the Panhandles.

.SPOTTER INFORMATION STATEMENT...

Limited spotter activation may be needed this afternoon and
evening.

Area fire managers and emergency officials should be alert for
elevated fire weather conditions today across the far western
parts of the Panhandles, and for elevated to critical fire
weather conditions on Friday across the western half of the
Panhandles.

Special Weather Statement
National Weather Service Amarillo TX
547 PM CDT THU MAY 17 2018

TXZ007-012-172315-
Potter TX-Moore TX-
547 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN POTTER AND
SOUTHEASTERN MOORE COUNTIES UNTIL 615 PM CDT...

At 547 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Masterson, or 19 miles southeast of Dumas, moving north
at 40 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Fritch, Masterson, Four Way and Lake Meredith.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 1000 PM CDT for
the Panhandle of Texas.

LAT...LON 3555 10199 3576 10198 3570 10162 3548 10163
TIME...MOT...LOC 2247Z 200DEG 35KT 3561 10181

Simpson

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
602 PM CDT THU MAY 17 2018

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

0557 PM     HAIL             3 E FRITCH              35.63N 101.55W
05/17/2018  M1.00 INCH       HUTCHINSON         TX   TRAINED SPOTTER

&&

EVENT NUMBER AMA1800072

TLH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
608 PM CDT THU MAY 17 2018

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

0604 PM     HAIL             6 NE HOUGH              36.93N 101.49W
05/17/2018  E1.00 INCH       TEXAS              OK   TRAINED SPOTTER

&&

EVENT NUMBER AMA1800073

JC

Special Weather Statement
National Weather Service Amarillo TX
610 PM CDT THU MAY 17 2018

OKZ002-172345-
Texas OK-
610 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL TEXAS COUNTY UNTIL
645 PM CDT...

At 610 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southeast of Guymon, moving east at 10 mph.

Nickel size hail will be possible with this storm.

This storm will remain over mainly rural areas of south central Texas
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

A severe thunderstorm watch remains in effect until 1000 PM CDT for
the Panhandle of Oklahoma.

LAT...LON 3650 10124 3650 10149 3663 10153 3670 10127
TIME...MOT...LOC 2310Z 259DEG 10KT 3657 10142

Simpson

Special Weather Statement
National Weather Service Amarillo TX
615 PM CDT THU MAY 17 2018

OKZ002-172345-
Texas OK-
615 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN TEXAS COUNTY UNTIL
645 PM CDT...

At 615 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Hooker, or 15 miles south of Feterita, moving east
at 10 mph.

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

Locations impacted include...
Hooker.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

A severe thunderstorm watch remains in effect until 1000 PM CDT for
the Panhandle of Oklahoma.

LAT...LON 3684 10115 3689 10150 3699 10149 3700 10118
TIME...MOT...LOC 2315Z 259DEG 9KT 3694 10138

Simpson

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
618 PM CDT THU MAY 17 2018

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

0520 PM     HAIL             7 SW DUMAS              35.79N 102.05W
05/17/2018  M1.25 INCH       MOORE              TX   LAW ENFORCEMENT

&&

EVENT NUMBER AMA1800075

TLH