Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 796, NWS Norman, OK

August 13, 2017Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Aug 13, 2017, 11:02 PM CDT for Hardeman County, Texas. It was in force for 43 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: Aug 13, 2017, 11:02 PM CDT (04:02 UTC)
Expired: Aug 13, 2017, 11:45 PM CDT
In force: 43 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 71 km from the middle of the area, began a volume at 04:06 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 4.0 hours before the alert went out and 207 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: 2289 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1216 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 8.3

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 10:50 PM CDT, 12 minutes earlier.

Area forecast discussion, Aug 13, 10:50 PM CDT, 12 minutes before

Area Forecast Discussion
National Weather Service Norman OK
1050 PM CDT Sun Aug 13 2017

.DISCUSSION...

&&

.AVIATION...
Thunderstorms will move through southwestern Oklahoma tonight and
spread east and south covering much of southern Oklahoma and
adjacent parts of Texas before sunrise Monday. MVFR ceilings will
develop if not already ongoing. Low clouds will lift above MVFR
during Monday afternoon while the rain and thunder will have moved
southeast of most TAF sites.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  83  71  86  73 /  30  60  60  30
Hobart OK         85  72  91  73 /  20  70  40  20
Wichita Falls TX  86  75  95  76 /  30  60  40  30
Gage OK           82  69  89  70 /  20  40  20  30
Ponca City OK     83  69  87  72 /  20  20  30  40
Durant OK         84  74  88  75 /  50  50  50  20

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

26/09/09

Hazardous weather outlook, Aug 13, 10:24 PM CDT, 38 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1024 PM CDT Sun Aug 13 2017

OKZ004>048-050>052-TXZ083>090-150330-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
1024 PM CDT Sun Aug 13 2017

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Tonight...

.Thunderstorms...
There is a slight risk of severe storms across western north Texas
through 3 am Monday morning. Main threats will be wind gusts of 60
to 70 mph, hail to the size of half dollars and locally heavy
rainfall.

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

.Thunderstorms...
Thunderstorms will be possible each day. A few strong to severe
thunderstorms with damaging winds and heavy rain will be possible
at times, but widespread significant severe weather is not
expected.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Special weather statement, Aug 13, 8:47 PM CDT, 2 hours 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
847 PM CDT SUN AUG 13 2017

OKZ033-034-036-140215-
Harmon OK-Greer OK-Jackson OK-
847 PM CDT SUN AUG 13 2017

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Harmon...south
central Greer and western Jackson Counties Until 915 PM CDT...

AT 845 PM CDT, the leading edge of strong and gusty thunderstorm
winds extended along a line extending from 9 miles northwest of Duke
to 3 miles east of Gould to 7 miles south of Hollis, moving
southeast at 35 MPH. These winds will occur well before the
thunderstorms themselves move into the area.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...

LAT...LON 3458 9986 3467 9967 3473 9967 3472 9959
      3479 9952 3463 9935 3443 9945 3441 9950
      3442 9958 3438 9960 3438 9969 3441 9973
      3442 9975
TIME...MOT...LOC 0145Z 315DEG 30KT 3477 9968 3467 9972 3459 9987

..speg.

Local storm report, Aug 13, 10:02 PM CDT, 1 hour before

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Local storm report, Aug 13, 10:04 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1004 PM CDT SUN AUG 13 2017

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

1003 PM     HAIL             6 ENE ELDORADO          34.51N 99.56W
08/13/2017  E1.50 INCH       JACKSON            OK   EMERGENCY MNGR

&&

MAD

Special weather statement, Aug 13, 10:33 PM CDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1033 PM CDT SUN AUG 13 2017

TXZ083-084-087-140400-
Foard TX-Knox TX-Hardeman TX-
1033 PM CDT SUN AUG 13 2017

...SIGNIFICANT WEATHER ADVISORY FOR western Foard...western Knox and
Hardeman Counties Until 1100 PM CDT...

AT 1031 PM CDT, strong thunderstorms were along a line extending from
10 miles northeast of Swearingen to 7 miles west of O'brien, moving
northeast at 35 MPH. Additional storms were moving southeast across
the Red River from near Eldorado Oklahoma.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...

LAT...LON 3340 9999 3440 10000 3446 9980 3438 9969
      3438 9960 3442 9958 3441 9951 3441 9950
      3440 9948 3425 9948 3409 9970 3340 9973
TIME...MOT...LOC 0331Z 205DEG 32KT 3421 9999 3341 9996

..speg.

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 13, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	45 min
Aug 13, 8:27 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	48 min
Aug 13, 8:47 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Aug 13, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	47 min
Aug 13, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	45 min
Aug 13, 10:17 PM CDT	Areal Flood Advisory	OUN	Jackson	118 min
Aug 13, 11:48 PM CDT	Areal Flood Advisory	OUN	Jackson	3 hr
Aug 14, 12:42 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	48 min
Aug 14, 12:50 AM CDT	Areal Flood Advisory	OUN	Jackson	3 hr
Aug 14, 1:04 AM CDT	Special Weather Statement	OUN	Kiowa	26 min
Aug 14, 1:37 AM CDT	Areal Flood Advisory	OUN	Kiowa	3 hr
Aug 14, 5:59 AM CDT	Special Weather Statement	OUN	Lincoln, Seminole	31 min
Aug 13, 10:33 PM CDT	Special Weather Statement	OUN	Foard, Hardeman, Knox	27 min
Aug 13, 11:08 PM CDT	Special Weather Statement	OUN	Foard, Knox	37 min
Aug 13, 11:24 PM CDT	Special Weather Statement	OUN	Wilbarger	36 min
Aug 13, 11:50 PM CDT	Areal Flood Advisory	OUN	Foard	3 hr
Aug 14, 12:15 AM CDT	Special Weather Statement	OUN	Wilbarger	30 min
Aug 14, 12:21 AM CDT	Special Weather Statement	OUN	Wichita	24 min
Aug 14, 12:28 AM CDT	Special Weather Statement	OUN	Baylor	32 min
Aug 14, 1:02 AM CDT	Areal Flood Advisory	OUN	Wilbarger	3 hr
Aug 14, 1:21 AM CDT	Areal Flood Advisory	OUN	Archer, Baylor	3 hr

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.