Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 674, NWS Norman, OK

July 15, 20164 counties in Oklahoma; Hardeman County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Jul 15, 2016, 11:13 PM CDT for 4 counties in Oklahoma; Hardeman County, Wilbarger County, Texas. It was in force for 47 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 15, 2016, 11:13 PM CDT (04:13 UTC)
Expired: Jul 16, 2016, 12:00 AM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Greer County, OK, Harmon County, OK, Jackson County, OK, Tillman County, OK, Hardeman County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 35 km from the middle of the area, began a volume at 04:12 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.

What was reported inside it

Time	Report	Where	Remark
Jul 15, 11:24 PM CDT	TSTM WND GST 70	Ne Olustee, OK	A PERSONAL WEATHER STATION.
Jul 15, 11:27 PM CDT	TSTM WND GST 78	Ne Olustee, OK	A PERSONAL WEATHER STATION
Jul 15, 11:30 PM CDT	TSTM WND GST 63	3 N Altus, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 11 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 15, 6:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.2 hours before the alert went out and 187 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: 1416 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

632 
WUUS54 KOUN 160413
SVROUN
OKC055-057-065-141-TXC197-487-160500-
/O.NEW.KOUN.SV.W.0674.160716T0413Z-160716T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1113 PM CDT FRI JUL 15 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...
  TILLMAN COUNTY IN SOUTHWESTERN OKLAHOMA...
  GREER COUNTY IN SOUTHWESTERN OKLAHOMA...
  SOUTHERN HARMON COUNTY IN SOUTHWESTERN OKLAHOMA...
  HARDEMAN COUNTY IN NORTHERN TEXAS...
  WILBARGER COUNTY IN NORTHERN TEXAS...

* UNTIL MIDNIGHT CDT

* AT 1113 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 3 MILES NORTHWEST OF WARREN TO 5 MILES SOUTHWEST OF
  ELDORADO...MOVING SOUTHEAST AT 50 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
           ROOFS...AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  ALTUS...VERNON...FREDERICK...MANGUM...QUANAH...GRANITE...TIPTON...
  BLAIR...CHILLICOTHE...OLUSTEE...CHATTANOOGA...ELDORADO...
  DAVIDSON...MANITOU...MARTHA...WILLOW...GOULD...ELMER...
  HEADRICK AND HOLLISTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3455 10000 3512 9956 3509 9937 3491 9929
      3487 9932 3482 9924 3485 9915 3471 9916
      3469 9904 3464 9910 3459 9883 3451 9883
      3451 9866 3439 9866 3421 9895 3392 9929
      3403 9948 3407 9948 3407 9954 3433 10000
TIME...MOT...LOC 0413Z 313DEG 41KT 3483 9926 3444 9973 

HAIL...1.00IN
WIND...70MPH
 
$$

..SPEG.

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 15, 8:33 PM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Jul 15, 8:33 PM CDT, 2 hours 40 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Norman OK
833 PM CDT FRI JUL 15 2016

.UPDATE...
Adjusted PoPs to account for complex moving into NW OK. See
discussion below.

&&

.DISCUSSION...
A severe complex of thunderstorms continues to move into NW OK
this evening. Significant wind gusts have already been reported
with this complex in KS and OK. Expect severe wind gusts to
continue over the next several hours as it dives south across
western OK, as LLJ intensifies. Although the hail threat is low
right now, expect it to increase as the storms move into a better
environment over western OK (mid level lapse rates ~8 C/km
effective bulk shear ~40 kt). Increased PoPs to categorical and
also bumped winds closer to the best performing HRRR solution. All
updated products have been sent.

RrBarnes

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  73  94  74  97 /  60  10   0   0
Hobart OK         74  99  75 100 /  80  10   0   0
Wichita Falls TX  75  99  76 100 /  50  10   0   0
Gage OK           70  96  74 100 /  80  10   0   0
Ponca City OK     73  90  76  97 /  50  20   0   0
Durant OK         75  96  75  96 /  20  10   0   0

&&

.OUN Watches/Warnings/Advisories...
OK...None.
TX...None.
&&

26/03

Hazardous weather outlook, Jul 15, 10:59 PM CDT, 14 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1059 PM CDT FRI JUL 15 2016

OKZ004>048-050>052-TXZ083>090-170400-
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-
1059 PM CDT FRI JUL 15 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...REST OF TONIGHT...

.THUNDERSTORMS...
THERE IS A RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF OKLAHOMA
AND WESTERN NORTH TEXAS THROUGH EARLY SATURDAY. THE GREATEST
POTENTIAL FOR SEVERE STORMS WILL BE IN PARTS OF WEST CENTRAL AND
SOUTHWEST OKLAHOMA... AND WESTERN NORTH TEXAS. STRONG TO SEVERE
STORMS WILL BE POSSIBLE THROUGH 3 AM SATURDAY.

A COMPLEX OF STORMS WILL CONTINUE TO MOVE ACROSS PORTIONS OF
OKLAHOMA AND WESTERN NORTH TEXAS THROUGH EARLY SATURDAY. DAMAGING
WINDS UP TO 80 MPH AND HAIL UP TO THE SIZE OF GOLF BALLS WILL BE
POSSIBLE. HEAVY RAIN AND FREQUENT LIGHTNING WILL ALSO OCCUR.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD
BE PREPARE FOR SEVERE WEATHER OPERATIONS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

.THUNDERSTORMS...
THUNDERSTORMS WILL BE POSSIBLE ACROSS CENTRAL AND EASTERN OKLAHOMA
SATURDAY MORNING. A FEW STORMS MAY PRODUCE STRONG GUSTY WINDS
AND HEAVY RAIN.

.HEAT...
AN UPPER LEVEL HIGH WILL BUILD OVER THE SOUTHERN AND CENTRAL
PLAINS SUNDAY INTO EARLY NEXT WEEK. THIS WILL BRING A PERIOD OF
HOT AND DRY WEATHER WITH SUNNY DAYS AND VERY WARM NIGHTS.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

In the hours before

Local storm report, Jul 15, 10:17 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1017 PM CDT FRI JUL 15 2016

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

0930 PM     TSTM WND GST     1 SE REYDON             35.64N 99.91W
07/15/2016  E60 MPH          ROGER MILLS        OK   EMERGENCY MNGR

&&

FM

Special weather statement, Jul 15, 10:25 PM CDT, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1025 PM CDT FRI JUL 15 2016

OKZ006-007-160430-
GRANT OK-ALFALFA OK-
1025 PM CDT FRI JUL 15 2016

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GRANT AND
NORTHEASTERN ALFALFA COUNTIES UNTIL 1130 PM CDT...

AT 1022 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR AMORITA...
MOVING SOUTHEAST AT 20 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
AMORITA...BYRON AND WALDRON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3680 9795 3679 9829 3700 9842 3700 9810
TIME...MOT...LOC 0322Z 325DEG 16KT 3697 9827

03

Local storm report, Jul 15, 10:53 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1053 PM CDT FRI JUL 15 2016

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

1045 PM     TSTM WND GST     4 WNW BESSIE            35.41N 99.05W
07/15/2016  M58 MPH          WASHITA            OK   MESONET

&&

FM

Local storm report, Jul 15, 11:02 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1102 PM CDT FRI JUL 15 2016

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

1055 PM     TSTM WND GST     3 W GOULD               34.67N 99.83W
07/15/2016  M64 MPH          HARMON             OK   MESONET

&&

FM

Local storm report, Jul 15, 11:07 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1107 PM CDT FRI JUL 15 2016

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

1100 PM     TSTM WND GST     3 W GOULD               34.67N 99.83W
07/15/2016  M63 MPH          HARMON             OK   MESONET

&&

EM

Local storm report, Jul 15, 11:11 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1111 PM CDT FRI JUL 15 2016

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

1105 PM     TSTM WND GST     3 N PUTNAM              35.90N 98.97W
07/15/2016  M59 MPH          DEWEY              OK   MESONET

&&

EM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:25 PM CDT	Severe Thunderstorm Warning	OUN	Harper	50 min
Jul 15, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	43 min
Jul 15, 8:40 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Roger Mills, Woods, Woodward	50 min
Jul 15, 9:19 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Ellis, Roger Mills	41 min
Jul 15, 9:24 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Harper, Major, Woods, Woodward	36 min
Jul 15, 9:47 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	43 min
Jul 15, 9:58 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Blaine, Custer, Dewey, Ellis, Major and 3 more	47 min
Jul 15, 10:25 PM CDT	Special Weather Statement	OUN	Alfalfa	65 min
Jul 15, 10:34 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon, Jackson	41 min
Jul 15, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Washita	47 min
Jul 15, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	34 min
Jul 15, 11:25 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Comanche, Custer, Dewey, Kiowa and 1 more	50 min
Jul 15, 11:40 PM CDT	Areal Flood Advisory	OUN	Custer, Dewey, Washita	3 hr
Jul 15, 11:59 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson, Tillman	46 min
Jul 16, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Kiowa, Washita	30 min
Jul 16, 12:43 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, Kiowa and 3 more	47 min
Jul 16, 1:27 AM CDT	Special Weather Statement	OUN	Cotton, Grady, Jefferson, Stephens	33 min
Jul 16, 1:58 AM CDT	Special Weather Statement	OUN	Jefferson, Stephens	32 min
Jul 15, 7:31 PM CDT	Special Weather Statement	OUN	Knox	29 min
Jul 16, 12:43 AM CDT	Special Weather Statement	OUN	Archer, Baylor, Foard, Hardeman, Knox, Wichita and 1 more	32 min
Jul 16, 1:14 AM CDT	Special Weather Statement	OUN	Archer, Baylor, Clay, Knox, Wichita, Wilbarger	46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Severe Thunderstorm Warnings in Texas, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.