Alert archive / Texas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 393, NWS Amarillo, TX

September 19, 2019Hemphill County, Roberts County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 19, 2019, 2:30 PM CDT for Hemphill County, Roberts County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 19, 2019, 2:30 PM CDT (19:30 UTC)
Expired: Sep 19, 2019, 3:30 PM CDT
In force: 60 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Hemphill County, TX, Roberts County, TX

The radar

The Amarillo radar (KAMA), 125 km from the middle of the area, began a volume at 19:31 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 nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 7.5 hours before the alert went out and 222 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: 1102 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 1421 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

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 Sep 19, 2:24 PM CDT, 6 minutes earlier.

Area forecast discussion, Sep 19, 2:24 PM CDT, 6 minutes before

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Hazardous weather outlook, Sep 19, 4:23 AM CDT, 10 hours 7 minutes before

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In the hours before

Special weather statement, Sep 19, 10:27 AM CDT, 4 hours 3 minutes before

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Special weather statement, Sep 19, 2:03 PM CDT, 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 7:03 PM CDT	Special Weather Statement	AMA	Armstrong	57 min
Sep 19, 10:27 AM CDT	Special Weather Statement	AMA	Carson	63 min
Sep 19, 2:03 PM CDT	Special Weather Statement	AMA	Roberts	42 min
Sep 19, 2:39 PM CDT	Special Weather Statement	AMA	Potter	36 min
Sep 19, 2:42 PM CDT	Special Weather Statement	AMA	Hartley	33 min
Sep 19, 2:53 PM CDT	Special Weather Statement	AMA	Dallam	52 min
Sep 19, 3:01 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham, Potter	59 min
Sep 19, 3:33 PM CDT	Special Weather Statement	AMA	Deaf Smith	42 min
Sep 19, 3:36 PM CDT	Special Weather Statement	AMA	Hemphill	39 min
Sep 19, 3:39 PM CDT	Special Weather Statement	AMA	Oldham	51 min
Sep 19, 4:00 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham, Potter	60 min
Sep 19, 4:25 PM CDT	Special Weather Statement	AMA	Randall	35 min
Sep 19, 4:29 PM CDT	Special Weather Statement	AMA	Potter	46 min
Sep 19, 5:03 PM CDT	Special Weather Statement	AMA	Moore	57 min
Sep 19, 5:19 PM CDT	Special Weather Statement	AMA	Carson	26 min
Sep 19, 5:45 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	60 min
Sep 19, 5:50 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	55 min
Sep 19, 6:13 PM CDT	Special Weather Statement	AMA	Randall	32 min
Sep 19, 6:45 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	60 min
Sep 19, 6:47 PM CDT	Areal Flood Advisory	AMA	Armstrong	6 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2019 Every severe thunderstorm warning in 2019

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.