Severe Thunderstorm Warning 135, NWS Amarillo, TX

158 
WWUS54 KAMA 310207
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
907 PM CDT Sun May 30 2021

OKC139-TXC195-233-341-357-393-421-310245-
/O.CON.KAMA.SV.W.0135.000000T0000Z-210531T0245Z/
Texas OK-Hutchinson TX-Hansford TX-Sherman TX-Roberts TX-
Ochiltree TX-Moore TX-
907 PM CDT Sun May 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN TEXAS...NORTHERN HUTCHINSON...HANSFORD...EASTERN
SHERMAN...NORTHWESTERN ROBERTS...WESTERN OCHILTREE AND NORTHEASTERN
MOORE COUNTIES...

At 907 PM CDT, severe thunderstorms were located along a line
extending from 12 miles southwest of Hardesty to 7 miles south of
Gruver to 5 miles southwest of Morse, 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.

Locations impacted include...
Spearman, Gruver, Hardesty, Morse, Farnsworth, Waka and Pringle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A Tornado Watch remains in effect until midnight CDT for the
Panhandle of Oklahoma...and the Panhandle of Texas.

LAT...LON 3650 10095 3650 10094 3615 10092 3586 10105
      3597 10186 3614 10170 3657 10169 3668 10095
TIME...MOT...LOC 0207Z 268DEG 18KT 3648 10135 3614 10140 3601 10156 

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

DGW

006 
WWUS54 KAMA 310220
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
920 PM CDT Sun May 30 2021

OKC139-TXC195-233-341-357-393-421-310245-
/O.CON.KAMA.SV.W.0135.000000T0000Z-210531T0245Z/
Texas OK-Hutchinson TX-Hansford TX-Sherman TX-Roberts TX-
Ochiltree TX-Moore TX-
920 PM CDT Sun May 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR SOUTHEASTERN TEXAS...NORTHERN HUTCHINSON...HANSFORD...
SOUTHEASTERN SHERMAN...NORTHWESTERN ROBERTS...WESTERN OCHILTREE AND
NORTHEASTERN MOORE COUNTIES...

At 920 PM CDT, severe thunderstorms were located along a line
extending from 10 miles southwest of Hardesty to 7 miles southwest of
Spearman to 3 miles south of Morse, moving east at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to roofs, siding, and trees is possible.

Locations impacted include...
Spearman, Gruver, Hardesty, Morse, Farnsworth, Waka and Pringle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A Tornado Watch remains in effect until midnight CDT for the
Panhandle of Oklahoma...and the Panhandle of Texas.

LAT...LON 3650 10095 3650 10094 3615 10092 3586 10105
      3597 10186 3614 10170 3615 10170 3622 10166
      3626 10153 3640 10147 3658 10151 3668 10095
TIME...MOT...LOC 0220Z 268DEG 18KT 3648 10127 3614 10132 3601 10148 

HAIL...0.75IN
WIND...60MPH
 
$$

DGW

103 
WWUS54 KAMA 310235
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
935 PM CDT Sun May 30 2021

OKC139-TXC195-233-341-357-393-421-310245-
/O.EXP.KAMA.SV.W.0135.000000T0000Z-210531T0245Z/
Texas OK-Hutchinson TX-Hansford TX-Sherman TX-Roberts TX-
Ochiltree TX-Moore TX-
935 PM CDT Sun May 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TEXAS...NORTHERN
HUTCHINSON...HANSFORD...SOUTHEASTERN SHERMAN...NORTHWESTERN
ROBERTS...WESTERN OCHILTREE AND NORTHEASTERN MOORE COUNTIES WILL
EXPIRE AT 945 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until midnight CDT for the
Panhandle of Oklahoma...and the Panhandle of Texas.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
the Panhandle of Oklahoma.

LAT...LON 3650 10095 3650 10094 3615 10092 3586 10105
      3597 10186 3614 10170 3615 10170 3622 10166
      3626 10153 3640 10147 3658 10151 3668 10095
TIME...MOT...LOC 0235Z 268DEG 18KT 3648 10119 3614 10124 3601 10140 

$$

DGW

Area Forecast Discussion
National Weather Service Amarillo TX
625 PM CDT Sun May 30 2021

.AVIATION...
00Z TAF Cycle

VFR conditions will quickly become MVFR to IFR between 00Z and 04Z
Monday. Showers and thunderstorms will be on the increase at all
three TAF sites between 00Z and 06Z Monday which will continue
through 00Z Tuesday. Thunderstorm wind gusts of 40 to 50 knots or
higher will be possible with the strongest thunderstorms between
00Z Monday and 06Z Monday. IFR to MVFR conditions will prevail
with some LIFR and VLIFR conditions in the heavy rainfall.
Southeast winds 15 to 25 knots with gusts near 30 knots will
become north to northeast 5 to 15 knots after 04Z to 06Z Monday.

Schneider

&&

.PREV DISCUSSION... /Issued 356 PM CDT Sun May 30 2021/

SHORT TERM...Tonight through Monday...

The two big questions of the day (1 will the clouds break and 2
will the boundary across the north hold there and not push through
the CWA) have now been answered - yes and yes. This appears to be
setting the stage for a widespread thunderstorm event with
potential for severe storms and very heavy rainfall tonight which
that the CAMS are finally seeming to agree on at least a little
better.

The jet exit region will move across the area overnight with good
upper diffluence spreading across the area. Multiple S/WVs moving
around the base of a deep trough in AZ S/WVs will continue to
move across the area through Monday. With low clouds scattering
out, temperatures have increased into the 70s most areas and ML
CAPE is around 1000-1500 J/KG and is forecast to reach 1500-2000
J/KG for most of the area by 00Z. There is good low level turning
in the wind fields and around a 90 kt upper level jet that will
move into the area, but the RAP progs of just 25-30 kt effective
bulk shear seems a tad low this evening especially given NAM pros
of 30-60 kt 0-6 km shear ahead of the storms. Convective
initiation is already occurring along the higher terrain of NM and
the outflow boundary across the north will be another potential
focus area. Discrete supercells are possible mainly in the west,
but appears these will be pretty quick to congeal into an MCS that
will have very good h85-h7 theta-e advection to feed this complex.
Given all this, all hazards are possible but the greatest hail
and tornado threat (5% per SPC) will be in the west before MCS
development. Very heavy rainfall is expected and much of the area
may see 1 to 3 inches (W/ locally higher amounts possible) in a
short period of time. The intersection of the outflow boundary and
the MCS could be an area to watch for highest rainfall totals as
well as greater tornado threat as well as the SE where many HREF
is pinging on higher potential for 2+ inch rainfall. A flood watch
has been issued for the entire region given the high rates
expected.

Best upper dynamics and strongest S/WV assoc w/ the upper system
might actually occur early Monday and therefore POPs remain
relatively high despite being on the backside the overnight MCS.
That said, storm intensity and rainfall rates should be much less
Monday and therefore the Flood Watch is set to expire at 12Z for
now. Cool outflow will fill in behind the storm complex w/ NRLY
winds developing and this will keep the area cool, cloudy and damp
on Monday with low clouds and SCT shra/tstms persisting.

LONG TERM...Monday night through Saturday

Open wave to move across the Panhandles Monday night keeping chances
for convection Monday night across most of the forecast area.
Upper trough will begin to shift east away from the Panhandles
Tuesday with the upper flow transitioning to northwesterly behind
the departing upper trough. Lingering convection possible Tuesday.
Perturbations within the northwesterly or north northwesterly
upper flow aloft Wednesday through Friday will bring chances for
convection again during the afternoon into the nighttime hours
during the latter half of the week. Upper high builds in over the
Great Basin region late in the week with a more northerly and even
a northeasterly upper flow expected across the Panhandles by
Friday and Saturday.

Surface ridge builds down from the north into the forecast area
early this week. Surfaced ridge to kick out to the south and east
by the middle of the week as surface low pressure develops to the
lee of the Rockies in eastern Colorado and eastern New Mexico.
Surface flow to transition from upslope southeasterly to more
southerly and southwesterly by the middle and end of the week.
Frontal boundary to the south of the Panhandles by the middle of
the week forecast to lift north and east near or into the
Panhandles before frontolysis occurs by Thursday or Friday. Any
residual surface boundaries across the Panhandles late this week
will be a focus for lift for diurnally- driven convection.

Weakness in the upper flow along with diurnal heating and ample
residual low level moisture, with dew points in the 50s and 60s,
will result in convection still not out of the equation Friday
afternoon and evening as well as Saturday afternoon and evening.
Early in the week, some of the stronger convection could still be
efficient rainfall producers.

Schneider

&&

.AMA Watches/Warnings/Advisories...
TX...Flood Watch through Monday morning for the following zones:
     Armstrong...Carson...Collingsworth...Dallam...Deaf Smith...
     Donley...Gray...Hansford...Hartley...Hemphill...
     Hutchinson...Lipscomb...Moore...Ochiltree...Oldham...Palo
     Duro Canyon...Potter...Randall...Roberts...Sherman...
     Wheeler.

OK...Flood Watch through Monday morning for the following zones:
     Beaver...Cimarron...Texas.

&&

11

Hazardous Weather Outlook
National Weather Service Amarillo TX
250 PM CDT Sun May 30 2021

OKZ001>003-TXZ001>020-317-311200-
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-
250 PM CDT Sun May 30 2021

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

.DAY ONE...Through Tonight.

Thunderstorms are expected to develop or move in from the west
through tonight across the Texas and Oklahoma Panhandles. Some
storms may become severe late this afternoon and evening, with
large hail and damaging winds the primary hazards. However, an
isolated tornado cannot be ruled out across the far western
sections of the area. In addition, the strongest storms will be
capable of producing heavy rainfall, which may lead to flooding or
flash flooding. A Flood Watch is in effect for all of the
Panhandles this evening through Monday morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Thunderstorms will be possible across the Texas and Oklahoma
Panhandles Memorial Day through Wednesday night, and then across
parts of the area Thursday through Saturday. Any storms that
develop are expected to remain below severe levels at this time.
In addition, the strongest storms on Memorial Day will be capable
of producing heavy rainfall, which may lead to flooding or flash
flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter groups and Emergency Management officials across the Texas
and Oklahoma Panhandles should remain alert and be ready for
possible activation through tonight.

Schneider

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
621 PM CDT SUN MAY 30 2021

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

0602 PM     TORNADO          4 NE FELT               36.61N 102.74W
05/30/2021                   CIMARRON           OK   STORM CHASER

            MULTIPLE REPORTS OF TWIN TORNADOES, STARTING
            AT 6:02 PM, CONTINUES AS OF REPORT.

&&

BIEDA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
627 PM CDT SUN MAY 30 2021

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

0627 PM     HAIL             7 SSW BOISE CITY        36.63N 102.55W
05/30/2021  M1.25 INCH       CIMARRON           OK   STORM CHASER

&&

BIEDA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
741 PM CDT SUN MAY 30 2021

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

0741 PM     HAIL             6 ESE STRATFORD         36.32N 101.96W
05/30/2021  M1.75 INCH       SHERMAN            TX   STORM CHASER

&&

BIEDA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
745 PM CDT SUN MAY 30 2021

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

0644 PM     TORNADO          10 S BOISE CITY         36.59N 102.54W
05/30/2021                   CIMARRON           OK   STORM CHASER

            MULTIPLE STORM CHASERS REPORTS OF A TORNADO.
            LASTING 1 MINUTE. (6:44 - 6:45 PM CDT).

0646 PM     TORNADO          7 N CONLEN              36.33N 102.25W
05/30/2021                   DALLAM             TX   STORM CHASER

            MULTIPLE CHASER PICTURES AND VIDEO OF A
            TORNADO, LASTED ABOUT 2 MINUTES.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
814 PM CDT SUN MAY 30 2021

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

0813 PM     HAIL             11 SSE TEXHOMA          36.33N 101.77W
05/30/2021  M1.00 INCH       SHERMAN            TX   STORM CHASER

&&

BIEDA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
816 PM CDT SUN MAY 30 2021

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

0731 PM     TORNADO          5 ESE STRATFORD         36.31N 102.00W
05/30/2021                   SHERMAN            TX   STORM CHASER

            NUMEROUS REPORTS OF A TORNADO WITH PICTURES
            AND LIVE STREAM. START TIME WAS 7:31 PM,
            LIFTED AT 7:38 PM.

&&

BIEDA