Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Amarillo, TX

April 16, 2017Ochiltree County, Roberts County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 16, 2017, 7:44 PM CDT for Ochiltree County, Roberts County, Texas. It was in force for 38 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: Apr 16, 2017, 7:44 PM CDT (00:44 UTC)
Expired: Apr 16, 2017, 8:22 PM CDT
In force: 38 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Ochiltree County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 113 km from the middle of the area, began a volume at 00:44 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 16, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.7 hours before the alert went out and 113 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: 908 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 2134 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

452 
WUUS54 KAMA 170044
SVRAMA
TXC357-393-170145-
/O.NEW.KAMA.SV.W.0021.170417T0044Z-170417T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Amarillo TX
744 PM CDT SUN APR 16 2017

The National Weather Service in Amarillo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Roberts County in the Panhandle of Texas...
  Southwestern Ochiltree County in the Panhandle of Texas...

* Until 845 PM CDT

* At 744 PM CDT, a severe thunderstorm was located 17 miles southeast
  of Spearman, moving north at 15 mph.

  HAZARD...Half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Roberts and southwestern Ochiltree Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3591 10089 3597 10109 3603 10109 3624 10104
      3620 10068
TIME...MOT...LOC 0044Z 194DEG 13KT 3602 10098 

HAIL...1.25IN
WIND...<50MPH
 
$$

14

3 follow-up statements

762 
WWUS54 KAMA 170058
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
758 PM CDT SUN APR 16 2017

TXC357-393-170145-
/O.CON.KAMA.SV.W.0021.000000T0000Z-170417T0145Z/
Roberts TX-Ochiltree TX-
758 PM CDT SUN APR 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHWESTERN ROBERTS AND SOUTHWESTERN OCHILTREE COUNTIES...

At 757 PM CDT, a severe thunderstorm was located 15 miles south of
Waka, or 15 miles southeast of Spearman, moving north at 15 mph.

HAZARD...Ping pong ball size hail. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. Hail may 
         accumulate on roadways causing hazardous travel. 

This severe thunderstorm will remain over mainly rural areas of
northwestern Roberts and southwestern Ochiltree Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3597 10085 3603 10109 3624 10104 3620 10068
TIME...MOT...LOC 0057Z 194DEG 13KT 3607 10096 

HAIL...1.50IN
WIND...<50MPH
 
$$

14

467 
WWUS54 KAMA 170105
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
805 PM CDT SUN APR 16 2017

TXC357-393-170145-
/O.CON.KAMA.SV.W.0021.000000T0000Z-170417T0145Z/
Roberts TX-Ochiltree TX-
805 PM CDT SUN APR 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHWESTERN ROBERTS AND SOUTHWESTERN OCHILTREE COUNTIES...

At 805 PM CDT, a severe thunderstorm was located 13 miles southeast
of Waka, or 15 miles southeast of Spearman, moving north at 15 mph.

HAZARD...Two inch hail. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. Hail may 
         accumulate on roadways causing hazardous travel. 

This severe thunderstorm will remain over mainly rural areas of
northwestern Roberts and southwestern Ochiltree Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3597 10085 3603 10109 3624 10104 3620 10068
TIME...MOT...LOC 0105Z 194DEG 13KT 3610 10095 

HAIL...2.00IN
WIND...<50MPH
 
$$

14

480 
WWUS54 KAMA 170122
SVSAMA

Severe Weather Statement
National Weather Service Amarillo TX
822 PM CDT SUN APR 16 2017

TXC357-393-170132-
/O.CAN.KAMA.SV.W.0021.000000T0000Z-170417T0145Z/
Roberts TX-Ochiltree TX-
822 PM CDT SUN APR 16 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ROBERTS AND
SOUTHWESTERN OCHILTREE COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the 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 3597 10085 3603 10109 3624 10104 3620 10068
TIME...MOT...LOC 0120Z 194DEG 13KT 3616 10093 

$$

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 7:29 PM CDT	Special Weather Statement	AMA	Roberts	31 min
Apr 16, 7:41 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	64 min
Apr 16, 7:43 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	14 min
Apr 16, 8:07 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	53 min
Apr 16, 8:17 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley	43 min
Apr 16, 8:22 PM CDT	Special Weather Statement	AMA	Ochiltree	23 min
Apr 16, 8:41 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	49 min
Apr 16, 8:53 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	37 min
Apr 16, 8:56 PM CDT	Special Weather Statement	AMA	Armstrong	64 min
Apr 16, 9:13 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	49 min
Apr 16, 9:17 PM CDT	Tornado Warning	AMA	Randall	13 min
Apr 16, 9:28 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	62 min
Apr 16, 9:40 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	45 min
Apr 16, 9:43 PM CDT	Special Weather Statement	AMA	Carson	47 min
Apr 16, 10:05 PM CDT	Special Weather Statement	AMA	Donley	55 min
Apr 16, 10:51 PM CDT	Special Weather Statement	AMA	Hemphill	54 min
Apr 16, 11:52 PM CDT	Special Weather Statement	AMA	Hemphill	23 min
Apr 17, 12:22 AM CDT	Special Weather Statement	AMA	Hemphill	38 min
Apr 17, 1:02 AM CDT	Special Weather Statement	AMA	Hemphill	43 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.