Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 99, NWS Amarillo, TX

May 28, 2018Ochiltree County, Texas; Beaver County, Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at May 28, 2018, 7:28 PM CDT for Ochiltree County, Texas; Beaver County, Texas County, Oklahoma. It was in force for 62 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 28, 2018, 7:28 PM CDT (00:28 UTC)
Expired: May 28, 2018, 8:30 PM CDT
In force: 62 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 1.75 in
Wind: 70.0 mph

Counties Beaver County, OK, Texas County, OK, Ochiltree County, TX

The radar

The Dodge City radar (KDDC), 155 km from the middle of the area, began a volume at 00:29 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.

What was reported inside it

Time	Report	Where
May 28, 7:37 PM CDT	HAIL 1	8 W Gray, OK
May 28, 7:57 PM CDT	HAIL 1.5	12 E Hardesty, OK
May 28, 8:01 PM CDT	HAIL 1.5	10 Sse Adams, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 9 minutes after it went out.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 3:17 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.5 hours before the alert went out and 159 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: 1638 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 2023 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

As transmitted.

838 
WUUS54 KAMA 290028
SVRAMA
OKC007-139-TXC357-290130-
/O.NEW.KAMA.SV.W.0099.180529T0028Z-180529T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
728 PM CDT MON MAY 28 2018

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Beaver County in the Panhandle of Oklahoma...
  Southeastern Texas County in the Panhandle of Oklahoma...
  North central Ochiltree County in the Panhandle of Texas...

* Until 830 PM CDT

* At 727 PM CDT, a severe thunderstorm was located 9 miles southwest
  of Bryans Corner, or 15 miles northwest of Perryton, moving
  northeast at 25 mph.

  HAZARD...Golf ball size hail and 70 mph wind gusts. 

  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...
  Bryans Corner, Balko and Boyd. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3640 10083 3657 10106 3653 10111 3688 10094
      3672 10060
TIME...MOT...LOC 0027Z 206DEG 24KT 3657 10098 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...70MPH
 
$$

DGW

1 follow-up statement

746 
WWUS54 KAMA 290101
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
801 PM CDT MON MAY 28 2018

TXC357-290110-
/O.CAN.KAMA.SV.W.0099.000000T0000Z-180529T0130Z/
Ochiltree TX-
801 PM CDT MON MAY 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL OCHILTREE 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 Oklahoma.

LAT...LON 3672 10060 3650 10078 3650 10081 3661 10107
      3688 10094
TIME...MOT...LOC 0100Z 206DEG 24KT 3677 10086 

$$

OKC007-139-290130-
/O.CON.KAMA.SV.W.0099.000000T0000Z-180529T0130Z/
Beaver OK-Texas OK-
801 PM CDT MON MAY 28 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN BEAVER AND EAST CENTRAL TEXAS COUNTIES...

At 800 PM CDT, a severe thunderstorm was located 5 miles northwest of
Boyd, or 18 miles west of Beaver, moving northeast at 30 mph.

HAZARD...Golf 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...
Bryans Corner, Balko and Boyd. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3672 10060 3650 10078 3650 10081 3661 10107
      3688 10094
TIME...MOT...LOC 0100Z 206DEG 24KT 3677 10086 

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

DGW

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 May 28, 6:34 PM CDT, 54 minutes earlier.

Area forecast discussion, May 28, 6:34 PM CDT, 54 minutes before

Area Forecast Discussion
National Weather Service Amarillo TX
634 PM CDT Mon May 28 2018

.AVIATION...
00Z TAF Cycle

VFR conditions will prevail at all three TAF sites except in and
near showers and thunderstorms where MVFR conditions will be
possible between 00Z and 04Z Tuesday. Southeast and south winds 15
to 25 knots with gusts to near 30 and 35 knots will be possible
and then winds decreasing to 10 to 20 knots after 04Z to 08Z
Tuesday. Winds at the Guymon and Dalhart TAF sites are expected to
become north and northeast 5 to 15 knots after 04Z to 08Z Tuesday
and then becoming southwest and west after 14Z to 20Z Tuesday.

Schneider

&&

.PREV DISCUSSION... /Issued 340 PM CDT Mon May 28 2018/

DISCUSSION...
Expecting storms today across the area and a severe thunderstorm
watch has already been issued. Visible satellite is showing a cu
field forming in the northwest and north central Panhandles.
Storms are expected to form along and ahead of the dryline that is
currently in eastern New Mexico and creeping into the far western
corner of Cimarron County. Bulk shear is around 30 to 40 kts and
soundings show 1200 to 2500 J of surfaced based CAPE with a
veering profile. This will allow for storms to be supercellular.
CAMs are showing discrete cells that may become more of a broken
line as the evening progresses. Large hail up to 2 inches or so
and damaging winds will be the main threats. LCL levels are
around 9000ft in the south and around 6000ft in the north. This
combined with 0-1km helicity in the north of 100-300 m squared per
s squared will also bring a window tonight, especially in the
north, for an isolated tornado or two. Storms will likely start
around 21Z and be out of the area by around 04Z. Any storms that
linger over an area may produce some localized flooding.

The mid level short wave responsible for the storms tonight will
push east and another will replace it tomorrow but further north
and keep storms mostly in the northeast corner of the area. A cold
front Wednesday will bring more storm potential to the northern
third of the Panhandles. Upper level southwest flow will return to
the area on Thursday and combine with downsloping winds to bring
high temps into the 100s for most of the region on Friday.
Troughing develops down the western coastline during this time and
begins to push eastward over the weekend and brings more chances
for storms again starting Sunday.

Beat

&&

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

&&

11

Hazardous weather outlook, May 28, 3:08 PM CDT, 4 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Amarillo TX
308 PM CDT Mon May 28 2018

OKZ001>003-TXZ001>020-317-290900-
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-
308 PM CDT Mon May 28 2018

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

.DAY ONE...This Afternoon and Tonight.

Thunderstorms will be possible across much of the Panhandles. Some
storms may become severe with large hail bigger than golf balls
and damaging winds. Isolated tornadoes will also be possible.
Heavy rain from the strongest storms may produce localized
flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms will be possible Tuesday and Wednesday across
northern parts and again on Sunday for the whole area. Some of
the storms may become severe with large hail and damaging winds
the main threats.

High temperatures may warm to 105 degrees or higher in Palo Duro
Canyon State Park on Friday. Therefore, a heat advisory may become
necessary.

.SPOTTER INFORMATION STATEMENT...

Spotters should stay alert for severe weather this afternoon and
evening.

Beat

In the hours before

Local storm report, May 28, 6:27 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
627 PM CDT MON MAY 28 2018

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

0626 PM     HAIL             6 N TEXHOMA             36.59N 101.78W
05/28/2018  M1.00 INCH       TEXAS              OK   TRAINED SPOTTER

            QUARTER SIZE HAIL REPORTED.

&&

EVENT NUMBER AMA1800143

BIEDA

Special weather statement, May 28, 6:31 PM CDT, 57 minutes before

Special Weather Statement
National Weather Service Amarillo TX
631 PM CDT MON MAY 28 2018

TXZ012-290000-
Potter TX-
631 PM CDT MON MAY 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN POTTER COUNTY UNTIL
700 PM CDT...

At 631 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Valley De Oro, or 16 miles northwest of Amarillo,
moving north at 25 mph.

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

Locations impacted include...
Valley De Oro and Bushland.

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 Texas.

LAT...LON 3522 10217 3530 10217 3554 10213 3543 10177
      3518 10200 3518 10205
TIME...MOT...LOC 2331Z 199DEG 22KT 3538 10200

DGW

Local storm report, May 28, 6:46 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
646 PM CDT MON MAY 28 2018

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

0644 PM     HAIL             TEXHOMA                 36.51N 101.79W
05/28/2018  E1.25 INCH       TEXAS              OK   TRAINED SPOTTER

            QUARTER TO HALF DOLLAR SIZE HAIL REPORTED.

&&

EVENT NUMBER AMA1800144

BIEDA

Local storm report, May 28, 7:06 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
706 PM CDT MON MAY 28 2018

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

0705 PM     HAIL             GOODWELL                36.59N 101.63W
05/28/2018  M1.25 INCH       TEXAS              OK   EMERGENCY MNGR

            EMERGENCY MANAGER IS REPORTING QUARTER TO HALF DOLLAR
            SIZE HAIL.

&&

EVENT NUMBER AMA1800145

BIEDA

Local storm report, May 28, 7:08 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
708 PM CDT MON MAY 28 2018

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

0706 PM     HAIL             GOODWELL                36.59N 101.63W
05/28/2018  M1.75 INCH       TEXAS              OK   TRAINED SPOTTER

&&

EVENT NUMBER AMA1800146

SCHNEIDER

Local storm report, May 28, 7:23 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
723 PM CDT MON MAY 28 2018

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

0716 PM     HAIL             8 NNW FARNSWORTH        36.43N 101.00W
05/28/2018  M1.30 INCH       OCHILTREE          TX   NWS EMPLOYEE

&&

EVENT NUMBER AMA1800147

SCHNEIDER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Sherman	60 min
May 28, 7:24 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley, Moore, Sherman	50 min
May 28, 7:36 PM CDT	Severe Thunderstorm Warning	AMA	Hutchinson, Moore, Oldham, Potter	39 min
May 28, 7:37 PM CDT	Areal Flood Advisory	AMA	Hansford, Moore, Sherman	3 hr
May 28, 7:45 PM CDT	Special Weather Statement	AMA	Moore	30 min
May 28, 7:50 PM CDT	Areal Flood Advisory	AMA	Hartley, Moore, Oldham, Potter	3 hr
May 28, 7:54 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter, Randall	53 min
May 28, 8:11 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree, Sherman	64 min
May 28, 8:12 PM CDT	Special Weather Statement	AMA	Moore	33 min
May 28, 8:25 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Moore	50 min
May 28, 8:32 PM CDT	Tornado Warning	AMA	Hansford, Sherman	43 min
May 28, 8:35 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	55 min
May 28, 9:12 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	63 min
May 28, 9:13 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree	62 min
May 28, 9:25 PM CDT	Special Weather Statement	AMA	Hutchinson	35 min
May 28, 10:13 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Lipscomb, Ochiltree, Roberts	62 min
May 28, 10:34 PM CDT	Tornado Warning	AMA	Ochiltree, Roberts	41 min
May 28, 11:06 PM CDT	Tornado Warning	AMA	Lipscomb, Ochiltree	20 min
May 28, 11:10 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb, Ochiltree	65 min
May 28, 11:49 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	56 min
May 29, 4:27 PM CDT	Special Weather Statement	AMA	Roberts	33 min
May 29, 4:34 PM CDT	Special Weather Statement	AMA	Ochiltree	26 min
May 29, 4:40 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	65 min
May 29, 4:46 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Hemphill, Roberts, Wheeler	59 min
May 29, 5:25 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb	74 min
May 29, 5:29 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Gray, Hemphill, Roberts, Wheeler	91 min
May 29, 5:31 PM CDT	Tornado Warning	AMA	Gray, Wheeler	44 min
May 29, 6:05 PM CDT	Tornado Warning	AMA	Wheeler	40 min
May 29, 6:21 PM CDT	Severe Thunderstorm Warning	AMA	Gray, Wheeler	24 min
May 29, 6:26 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	79 min
May 28, 7:01 PM CDT	Severe Thunderstorm Warning	AMA	Texas	59 min
May 28, 7:38 PM CDT	Tornado Warning	AMA	Texas	39 min
May 28, 7:59 PM CDT	Severe Thunderstorm Warning	AMA	Texas	61 min
May 28, 8:27 PM CDT	Tornado Warning Tornado observed	AMA	Beaver, Texas	48 min
May 28, 9:24 PM CDT	Special Weather Statement	AMA	Texas	36 min
May 28, 10:11 PM CDT	Severe Thunderstorm Warning	AMA	Beaver, Texas	32 min
May 28, 10:42 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	41 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

Sources

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