Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 154, NWS Amarillo, TX

June 20, 2017Dallam County, Sherman County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 20, 2017, 11:59 PM CDT for Dallam County, Sherman County, Texas. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 20, 2017, 11:59 PM CDT (04:59 UTC)
Expired: Jun 21, 2017, 12:25 AM CDT
In force: 26 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

Counties Dallam County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 127 km from the middle of the area, began a volume at 05:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 5.0 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 647 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 2792 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

673 
WUUS54 KAMA 210459
SVRAMA
TXC111-421-210600-
/O.NEW.KAMA.SV.W.0154.170621T0459Z-170621T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
1159 PM CDT TUE JUN 20 2017

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Western Sherman County in the Panhandle of Texas...
  Eastern Dallam County in the Panhandle of Texas...

* Until 100 AM CDT

* At 1159 PM CDT, a severe thunderstorm was located 5 miles north of
  Stratford, moving south at 15 mph.

  HAZARD...70 mph wind gusts and ping pong ball size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect some tree damage. Damage is likely to mobile 
           homes, roofs, and outbuildings. People and animals 
           outdoors will be injured. Expect hail damage to roofs, 
           siding, windows, and vehicles. 

* Locations impacted include...
  Stratford and Conlen. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3649 10223 3646 10193 3607 10198 3607 10234
TIME...MOT...LOC 0459Z 013DEG 14KT 3641 10207 

HAIL...1.50IN
WIND...70MPH
 
$$

Schneider

3 follow-up statements

851 
WWUS54 KAMA 210515
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1215 AM CDT WED JUN 21 2017

TXC111-421-210600-
/O.CON.KAMA.SV.W.0154.000000T0000Z-170621T0600Z/
Sherman TX-Dallam TX-
1215 AM CDT WED JUN 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR WESTERN SHERMAN AND EAST CENTRAL DALLAM COUNTIES...

At 1215 AM CDT, a severe thunderstorm was located 4 miles northeast
of Stratford, moving south at 15 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...
Stratford and Conlen. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3647 10206 3644 10193 3607 10198 3616 10230
      3648 10213
TIME...MOT...LOC 0515Z 017DEG 15KT 3640 10204 

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

Schneider

815 
WWUS54 KAMA 210522
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1222 AM CDT WED JUN 21 2017

TXC111-210531-
/O.CAN.KAMA.SV.W.0154.000000T0000Z-170621T0600Z/
Dallam TX-
1222 AM CDT WED JUN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DALLAM COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved away 
from the area. Therefore the warning has been cancelled.

LAT...LON 3647 10206 3644 10193 3607 10198 3611 10214
      3648 10213
TIME...MOT...LOC 0521Z 013DEG 14KT 3637 10205 

$$

TXC421-210600-
/O.CON.KAMA.SV.W.0154.000000T0000Z-170621T0600Z/
Sherman TX-
1222 AM CDT WED JUN 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR WESTERN SHERMAN COUNTY...

At 1221 AM CDT, a severe thunderstorm was located over Stratford,
moving south at 15 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...
Stratford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3647 10206 3644 10193 3607 10198 3611 10214
      3648 10213
TIME...MOT...LOC 0521Z 013DEG 14KT 3637 10205 

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

Schneider

107 
WWUS54 KAMA 210525
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
1225 AM CDT WED JUN 21 2017

TXC421-210535-
/O.CAN.KAMA.SV.W.0154.000000T0000Z-170621T0600Z/
Sherman TX-
1225 AM CDT WED JUN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SHERMAN COUNTY 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.

LAT...LON 3647 10206 3644 10193 3607 10198 3611 10214
      3648 10213
TIME...MOT...LOC 0521Z 013DEG 14KT 3636 10205 

$$

Schneider

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 5:26 PM CDT, 6 hours 33 minutes earlier.

Area forecast discussion, Jun 20, 5:26 PM CDT, 6 hours 33 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Amarillo TX
526 PM CDT Tue Jun 20 2017

.AVIATION...
A few thunderstorms may affect the DHT and GUY TAF sites this
evening. The strongest storms will be capable of producing hail
and gusty winds. At this point, it looks like the showers and
storms will dissipate before moving near the AMA TAF site.
Southerly winds will be around 10 knots or less overnight, but
then they will increase by mid morning on Wednesday. Skies are
expected to remain VFR outside of thunderstorms.

&&

.PREV DISCUSSION... /Issued 413 PM CDT Tue Jun 20 2017/

DISCUSSION...
Latest satellite image is showing cumulus cloud building across
most of the Panhandles, especially across the western Panhandles
near the surface trough over NE New Mexico and SE Colorado where
showers and storms are initiating over the high terrain as well
into portions of SW Kansas. Satellite wind profiles of
northwesterly flow of 15-25 kts at 600-450 hPa shows perhaps
enough flow to move these storms into the northern and western
Panhandles. As the storms move east, latest hi-res analysis shows
good DCAPE environment of around 1500 J/kg in-conjunction with
shear of 30-40 kts. With supporting inverted-v forecast soundings
over parts of the northern Panhandles, if storms make it into our
region, strong winds will be the primary threat. Large hail cannot
also be completely ruled out. Storms should dissipate as we lose
daytime heating into the evening hours. Low temperatures tonight
will range from the mid 60s to lower 70s.

This similar pattern of diurnally driven storms will continue
throughout the remainder of the work week with best chances across
the northern and western Panhandles. As an upper level high
pressure sits over AZ/NM, these bouts of energy riding over the
ridge will help initiate convection over the high terrain over CO
and NM and move southeast over our region. Some of the storms on
Wednesday could also be strong and will be monitored with updates
to the forecast as we get closer.

A cold front will slowly move from north to south across the
Panhandles during the day on Friday. Along and out ahead of the
front, showers and storms may develop with the given surface
forcing. Latest 25/12Z models are not in accord once we go past
Friday night. ECMWF is drier compared to the GFS going forward as
the main 800-600 hPa temperatures advection lags behind the main
front. This may provide additional mid level instability as the
temperature contrast swings thorough the region, hence slight
chances POPS remains through the weekend as a surface trough may
set up across eastern NM providing diurnally driven convection.
Blended guidance reflects current precipitation forecast. The
main weather change behind the front will be nice cool air
returning to region with highs on Sunday in the 70s.

Upper level ridge of high pressure looks to build back north as
we go into next week. This will bring tranquil conditions back to
the region, with only a slight chance of a shower or storm in the
far western areas. Otherwise, temperatures will warm up to near or
slightly above average as we go into next week.

Meccariello

&&

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

&&

15/16

Hazardous weather outlook, Jun 20, 4:27 PM CDT, 7 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
427 PM CDT Tue Jun 20 2017

OKZ001>003-TXZ001>020-211100-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
427 PM CDT Tue Jun 20 2017

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

.DAY ONE...Tonight.

Thunderstorms are possible across the northern and western
Panhandles through the early evening hours. Some of these storms
may produce strong winds and large hail.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thunderstorms will be possible across much of the Oklahoma and
Texas Panhandles Wednesday through Monday. Some storms that
develop will have the potential to become strong.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jun 20, 9:49 PM CDT, 2 hours 10 minutes before

Special Weather Statement
National Weather Service Amarillo TX
949 PM CDT TUE JUN 20 2017

TXZ016-210345-
Deaf Smith TX-
949 PM CDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DEAF SMITH COUNTY
UNTIL 1045 PM CDT...

At 949 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles south of Glenrio to 12 miles northwest
of Ranchvale. Movement was southeast at 25 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
Bootleg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3515 10304 3491 10240 3475 10263 3475 10304
TIME...MOT...LOC 0249Z 308DEG 24KT 3508 10308 3461 10348

LG

Special weather statement, Jun 20, 10:12 PM CDT, 1 hour 47 minutes before

Special Weather Statement
National Weather Service Amarillo TX
1012 PM CDT TUE JUN 20 2017

OKZ003-TXZ005-210415-
Beaver OK-Lipscomb TX-
1012 PM CDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN BEAVER AND
NORTHEASTERN LIPSCOMB COUNTIES UNTIL 1115 PM CDT...

At 1011 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Beaver, moving southeast at 20 mph.

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

Locations impacted include...
Follett, Darrouzett, Gate, Knowles, Elmwood and Slapout.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3658 10067 3687 10040 3688 10000 3628 10000
TIME...MOT...LOC 0311Z 317DEG 17KT 3672 10043

LG

Special weather statement, Jun 20, 10:22 PM CDT, 1 hour 37 minutes before

Special Weather Statement
National Weather Service Amarillo TX
1022 PM CDT TUE JUN 20 2017

OKZ002-210415-
Texas OK-
1022 PM CDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TEXAS COUNTY UNTIL
1115 PM CDT...

At 1021 PM CDT, Doppler radar was tracking a strong thunderstorm over
Eva, or 15 miles south of Elkhart, moving southeast at 25 mph.

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

Locations impacted include...
Goodwell, Texhoma and Eva.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3666 10149 3650 10155 3650 10203 3680 10203
      3688 10185
TIME...MOT...LOC 0321Z 322DEG 21KT 3677 10189

LG

Local storm report, Jun 20, 10:29 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1029 PM CDT TUE JUN 20 2017

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

0928 PM     HAIL             4 W SUNRAY              36.02N 101.89W
06/20/2017  E0.88 INCH       MOORE              TX   FIRE DEPT/RESCUE

&&

EVENT NUMBER AMA1700691

BEAT

Special weather statement, Jun 20, 10:47 PM CDT, 1 hour 12 minutes before

Special Weather Statement
National Weather Service Amarillo TX
1047 PM CDT TUE JUN 20 2017

OKZ001-002-TXZ001-002-210445-
Cimarron OK-Texas OK-Sherman TX-Dallam TX-
1047 PM CDT TUE JUN 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TEXAS...SOUTHEASTERN
CIMARRON...NORTHERN SHERMAN AND NORTHEASTERN DALLAM COUNTIES UNTIL
1145 PM CDT...

At 1047 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles northeast of Griggs, or 23 miles south of Elkhart, moving south
at 15 mph.

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

Locations impacted include...
Stratford, Goodwell, Griggs and Texhoma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take shelter in a sturdy building if threatening weather approaches.

&&

LAT...LON 3674 10160 3650 10161 3650 10163 3628 10162
      3620 10210 3635 10230 3676 10210
TIME...MOT...LOC 0347Z 004DEG 14KT 3668 10200

LG

Local storm report, Jun 20, 11:20 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1120 PM CDT TUE JUN 20 2017

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

0903 PM     TSTM WND DMG     16 SSE STRATFORD        36.12N 101.96W
06/20/2017                   SHERMAN            TX   LAW ENFORCEMENT

            5 TO 6 POWER POLES BLOWN OVER ONTO F.M. ROAD 1573 7
            MILES EAST OF U.S. HIGHWAY 287.

&&

EVENT NUMBER AMA1700692

LG

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 8:07 PM CDT	Special Weather Statement	AMA	Sherman	53 min
Jun 20, 8:39 PM CDT	Special Weather Statement	AMA	Sherman	36 min
Jun 20, 8:54 PM CDT	Severe Thunderstorm Warning	AMA	Hutchinson, Moore, Sherman	83 min
Jun 20, 9:49 PM CDT	Special Weather Statement	AMA	Deaf Smith	56 min
Jun 20, 10:47 PM CDT	Special Weather Statement	AMA	Sherman	58 min
Jun 20, 11:07 PM CDT	Severe Thunderstorm Warning	AMA	Sherman	53 min
Jun 21, 12:28 AM CDT	Special Weather Statement	AMA	Sherman	62 min
Jun 21, 12:34 AM CDT	Special Weather Statement	AMA	Moore	56 min
Jun 21, 1:28 AM CDT	Special Weather Statement	AMA	Potter	62 min
Jun 21, 3:15 AM CDT	Special Weather Statement	AMA	Gray	60 min
Jun 21, 3:24 AM CDT	Special Weather Statement	AMA	Donley	66 min
Jun 21, 3:38 PM CDT	Special Weather Statement	AMA	Dallam	52 min
Jun 21, 3:44 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	61 min
Jun 21, 4:41 PM CDT	Special Weather Statement	AMA	Dallam	64 min
Jun 21, 4:52 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	40 min
Jun 21, 5:35 PM CDT	Special Weather Statement	AMA	Oldham	40 min
Jun 21, 5:59 PM CDT	Special Weather Statement	AMA	Oldham	61 min
Jun 21, 6:02 PM CDT	Special Weather Statement	AMA	Hartley	73 min
Jun 21, 6:15 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham, Potter	90 min
Jun 21, 6:39 PM CDT	Special Weather Statement	AMA	Oldham	36 min
Jun 21, 6:48 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	72 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.