Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 550, NWS Norman, OK

July 3, 20154 counties in Texas

NWS Norman, OK issued this severe thunderstorm warning at Jul 3, 2015, 7:13 PM CDT for 4 counties in Texas. It was in force for 47 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: Jul 3, 2015, 7:13 PM CDT (00:13 UTC)
Expired: Jul 3, 2015, 8:00 PM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Baylor County, TX, Foard County, TX, Hardeman County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 63 km from the middle of the area, began a volume at 00:13 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

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 235 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: 567 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1739 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 32 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 Jul 3, 6:37 PM CDT, 36 minutes earlier.

Area forecast discussion, Jul 3, 6:37 PM CDT, 36 minutes before

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Hazardous weather outlook, Jul 3, 7:06 PM CDT, 7 minutes before

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In the hours before

Special weather statement, Jul 3, 6:08 PM CDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
608 PM CDT FRI JUL 3 2015

OKZ022-032345-
WASHITA OK-
608 PM CDT FRI JUL 3 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL WASHITA COUNTY
UNTIL 645 PM CDT...

AT 607 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR CORDELL. THIS
STORM WAS NEARLY STATIONARY.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
HAIL UP TO ONE-HALF INCH DIAMETER...

LAT...LON 3534 9907 3529 9885 3512 9886 3511 9897
      3516 9918
TIME...MOT...LOC 2307Z 26DEG 2KT 3525 9899

Local storm report, Jul 3, 6:42 PM CDT, 31 minutes before

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Local storm report, Jul 3, 6:43 PM CDT, 30 minutes before

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Special weather statement, Jul 3, 6:53 PM CDT, 20 minutes before

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Local storm report, Jul 3, 6:57 PM CDT, 16 minutes before

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Special weather statement, Jul 3, 7:10 PM CDT, 3 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
Jul 3, 7:10 PM CDT	Special Weather Statement	OUN	Kiowa	35 min
Jul 3, 7:36 PM CDT	Special Weather Statement	OUN	Atoka	24 min
Jul 3, 7:41 PM CDT	Special Weather Statement	OUN	Kiowa	34 min
Jul 3, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Tillman	47 min
Jul 3, 8:00 PM CDT	Special Weather Statement	OUN	Coal	30 min
Jul 3, 8:34 PM CDT	Special Weather Statement	OUN	Stephens	26 min
Jul 3, 9:56 PM CDT	Special Weather Statement	OUN	Hughes	34 min
Jul 3, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	31 min
Jul 4, 3:53 AM CDT	Special Weather Statement	OUN	Garvin	37 min
Jul 4, 5:26 AM CDT	Special Weather Statement	OUN	Major	34 min
Jul 4, 2:26 PM CDT	Special Weather Statement	OUN	Blaine	34 min
Jul 4, 2:59 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	30 min
Jul 4, 3:28 PM CDT	Special Weather Statement	OUN	Caddo	32 min
Jul 4, 3:47 PM CDT	Special Weather Statement	OUN	Blaine	28 min
Jul 4, 4:01 PM CDT	Areal Flood Advisory	OUN	Blaine, Canadian, Kingfisher	3 hr
Jul 4, 4:11 PM CDT	Special Weather Statement	OUN	Kingfisher	34 min
Jul 4, 4:17 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	33 min
Jul 4, 4:32 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	43 min
Jul 4, 4:36 PM CDT	Special Weather Statement	OUN	Grady	24 min
Jul 4, 4:54 PM CDT	Special Weather Statement	OUN	Canadian	36 min
Jul 4, 5:01 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	30 min
Jul 4, 5:28 PM CDT	Special Weather Statement	OUN	Caddo	32 min
Jul 4, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Johnston	25 min
Jul 4, 5:59 PM CDT	Special Weather Statement	OUN	Cotton, Tillman	31 min
Jul 4, 6:14 PM CDT	Special Weather Statement	OUN	Grady	31 min
Jul 4, 6:17 PM CDT	Special Weather Statement	OUN	Atoka	28 min
Jul 4, 6:30 PM CDT	Special Weather Statement	OUN	Cotton	30 min
Jul 4, 6:41 PM CDT	Special Weather Statement	OUN	Cleveland	49 min
Jul 4, 6:51 PM CDT	Special Weather Statement	OUN	Bryan	39 min
Jul 4, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	52 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

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.