Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 174, NWS Norman, OK

May 17, 2018Foard County, Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 17, 2018, 8:19 PM CDT for Foard County, Hardeman County, Texas. It was in force for 41 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: May 17, 2018, 8:19 PM CDT (01:19 UTC)
Expired: May 17, 2018, 9:00 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Foard County, TX, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 77 km from the middle of the area, began a volume at 01:22 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, 1.3 hours before the alert went out and 215 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: 695 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1805 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 319 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 17, 6:19 PM CDT, 2 hours earlier.

Area forecast discussion, May 17, 6:19 PM CDT, 2 hours before

Area Forecast Discussion
National Weather Service Norman OK
619 PM CDT Thu May 17 2018

.DISCUSSION...

&&

.AVIATION...
Although isolated thunderstorms and showers may enter southwestern
OK an adjacent parts of TX this evening, they are not expected to
affect TAF locations other than SPS. Otherwise, VFR conditions
are expected along with southeast winds, gusty in western OK.

&&

.PREV DISCUSSION... /issued 351 PM CDT Thu May 17 2018/

DISCUSSION...
Isolated storms will still be possible this evening, but the main
precipitation chances will begin this evening as the developing
storms near the Texas-New Mexico border move east toward the area.
There is a pretty good signal for a complex of storms to move into
the area with the highest coverage expected to be in the
southwest. These will likely weaken overnight as they move east
with the coverage decreasing and will keep the highest POPs this
evening. What is left of these storms will dissipate and/or move
out of the area Friday morning, with the next potential round of
storms tomorrow afternoon and tomorrow evening as another
shortwave approaches.

As has been advertised, the main wave ejects into the central
Plains Saturday and with it will be the highest precipitation
chances Saturday night, and the arrival of a cold front bringing
temperatures down from hot to seasonable for early next week. Any
lull after this wave moves out will be relatively brief as
precipitation chances return Sunday evening or Sunday night. And
we will remain under a general southwest flow aloft with various
shortwaves moving over the Plains with associated storm chances.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  67  88  70  90 /  20  20  20  20
Hobart OK         65  94  69  92 /  40  20  20  30
Wichita Falls TX  67  95  72  94 /  40  10  20  20
Gage OK           65  91  64  87 /  50  20  20  20
Ponca City OK     65  87  68  91 /  20  20  20  20
Durant OK         67  89  70  90 /  20  20  10  10

&&

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

23/23/09

Hazardous weather outlook, May 17, 8:15 PM CDT, 4 minutes before

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In the hours before

Local storm report, May 17, 4:23 PM CDT, 3 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
423 PM CDT THU MAY 17 2018

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

0406 PM     HAIL              CYRIL                  34.88N 98.18W
05/17/2018  E1.00 INCH       CADDO              OK   BROADCAST MEDIA

&&

FM

Special weather statement, May 17, 4:28 PM CDT, 3 hours 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
428 PM CDT THU MAY 17 2018

OKZ027-038-039-172200-
Grady OK-Stephens OK-Comanche OK-
428 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR southwestern Grady...north
central Stephens and eastern Comanche Counties Until 500 PM CDT...

AT 426 PM CDT, a strong thunderstorm was located 6 miles northeast of
Sterling, moving southeast at 30 MPH.

HAZARDS INCLUDE...
Hail up to the size of quarters...

Locations impacted include...
Duncan, Marlow, Rush Springs, Bray and Acme.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3480 9814 3489 9805 3469 9774 3456 9794
TIME...MOT...LOC 2126Z 314DEG 25KT 3481 9808

11

Local storm report, May 17, 5:05 PM CDT, 3 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
505 PM CDT THU MAY 17 2018

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

0410 PM     HAIL             1 S CYRIL               34.90N 98.19W
05/17/2018  E1.25 INCH       CADDO              OK   BROADCAST MEDIA

            TIME BASED ON RADAR.

&&

FM

Special weather statement, May 17, 5:57 PM CDT, 2 hours 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
557 PM CDT THU MAY 17 2018

TXZ084-087-172315-
Foard TX-Knox TX-
557 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR southwestern Foard and
northwestern Knox Counties Until 615 PM CDT...

AT 555 PM CDT, a strong thunderstorm was located 12 miles northwest
of Benjamin, moving northeast at 15 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Benjamin and Truscott.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3388 9987 3362 9966 3351 9999 3371 10000
      3381 10000
TIME...MOT...LOC 2255Z 233DEG 15KT 3365 9999

WR

Special weather statement, May 17, 7:34 PM CDT, 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
734 PM CDT THU MAY 17 2018

OKZ014-021-180100-
Roger Mills OK-Beckham OK-
734 PM CDT THU MAY 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR southwestern Roger Mills and
northern Beckham Counties Until 800 PM CDT...

AT 730 PM CDT, a strong thunderstorm was located near Sweetwater,
moving east at 40 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Sayre, Sweetwater and Berlin.

This includes Interstate 40 between mile markers 18 and 34.

LAT...LON 3534 9998 3551 9993 3545 9945 3522 9957
TIME...MOT...LOC 0030Z 283DEG 37KT 3541 9986

WR

Special weather statement, May 17, 7:57 PM CDT, 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 7:34 PM CDT	Special Weather Statement	OUN	Beckham	26 min
May 17, 8:21 PM CDT	Special Weather Statement	OUN	Washita	39 min
May 17, 9:13 PM CDT	Special Weather Statement	OUN	Comanche	32 min
May 18, 4:11 AM CDT	Special Weather Statement	OUN	Custer	19 min
May 18, 5:35 PM CDT	Special Weather Statement	OUN	Jackson	25 min
May 18, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	49 min
May 18, 6:27 PM CDT	Special Weather Statement	OUN	Harper	33 min
May 18, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Harper	50 min
May 17, 7:14 PM CDT	Severe Thunderstorm Warning	OUN	Knox	46 min
May 17, 7:30 PM CDT	Areal Flood Advisory	OUN	Knox	2 hr
May 17, 7:44 PM CDT	Flash Flood Warning	OUN	Knox	2 hr
May 17, 7:57 PM CDT	Special Weather Statement	OUN	Hardeman	33 min
May 17, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Knox	28 min
May 17, 9:03 PM CDT	Special Weather Statement	OUN	Baylor	27 min
May 17, 10:43 PM CDT	Special Weather Statement	OUN	Clay	32 min
May 18, 6:00 PM CDT	Special Weather Statement	OUN	Hardeman	30 min

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.