Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 671, NWS Norman, OK

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

NWS Norman, OK issued this severe thunderstorm warning at Jul 15, 2016, 10:34 PM CDT for 4 counties in Oklahoma; Hardeman County, Texas. It was in force for 41 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, 10:34 PM CDT (03:34 UTC)
Expired: Jul 15, 2016, 11:15 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 65 km from the middle of the area, began a volume at 03:34 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, 10:55 PM CDT	TSTM WND GST 64	3 W Gould, OK
Jul 15, 11:00 PM CDT	TSTM WND GST 63	3 W Gould, OK
Jul 15, 11:24 PM CDT	TSTM WND GST 70	Ne Olustee, OK	A PERSONAL WEATHER STATION.

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 2 storm reports to this severe thunderstorm warning; the first came 21 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, 3.6 hours before the alert went out and 197 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.

583 
WUUS54 KOUN 160334
SVROUN
OKC009-055-057-065-TXC197-160415-
/O.NEW.KOUN.SV.W.0671.160716T0334Z-160716T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1034 PM CDT FRI JUL 15 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

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

* UNTIL 1115 PM CDT

* AT 1034 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES
  NORTHEAST OF DODSON TEXAS...MOVING SOUTHEAST AT 55 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...MANGUM...QUANAH...HOLLIS...GRANITE...BLAIR...OLUSTEE...
  ELDORADO...MARTHA...WILLOW...GOULD...FRIENDSHIP...GOODLETT...
  DUKE...ALTUS AIR FORCE BASE...VINSON...WARREN...HESTER...
  LAZARE AND ALTUS-LUGERT LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS.

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

&&

LAT...LON 3510 10000 3511 9954 3512 9938 3511 9940
      3509 9937 3506 9937 3502 9932 3498 9935
      3491 9929 3487 9932 3482 9924 3483 9922
      3471 9916 3438 9946 3439 9947 3436 9947
      3409 9973 3410 9976 3423 10000
TIME...MOT...LOC 0334Z 305DEG 47KT 3483 9997 

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

..SPEG.

1 follow-up statement

166 
WWUS54 KOUN 160351
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1051 PM CDT FRI JUL 15 2016

OKC009-055-057-065-TXC197-160415-
/O.CON.KOUN.SV.W.0671.000000T0000Z-160716T0415Z/
JACKSON OK-BECKHAM OK-GREER OK-HARMON OK-HARDEMAN TX-
1051 PM CDT FRI JUL 15 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR JACKSON...SOUTHERN BECKHAM...GREER...HARMON AND HARDEMAN
COUNTIES...

AT 1050 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTH OF
VINSON...MOVING SOUTHEAST AT 30 MPH. THIS IS PART OF A LINE OF
SEVERE STORMS EXTENDING FROM NEAR WILLOW TO NEAR HOLLIS AND INTO THE
TEXAS PANHANDLE.

THIS IS A VERY DANGEROUS STORM.

HAZARD...80 MPH WIND GUSTS AND GOLF BALL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
         SHELTER. MOBILE HOMES WILL BE HEAVILY DAMAGED. EXPECT 
         CONSIDERABLE DAMAGE TO ROOFS...WINDOWS...AND VEHICLES. 
         EXTENSIVE TREE DAMAGE AND POWER OUTAGES ARE LIKELY. 

LOCATIONS IMPACTED INCLUDE...
ALTUS...MANGUM...QUANAH...HOLLIS...GRANITE...BLAIR...OLUSTEE...
ELDORADO...MARTHA...WILLOW...GOULD...FRIENDSHIP...GOODLETT...DUKE...
ALTUS AIR FORCE BASE...VINSON...WARREN...HESTER...
LAZARE AND ALTUS-LUGERT LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS.

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

&&

LAT...LON 3510 10000 3511 9954 3512 9938 3511 9940
      3509 9937 3506 9937 3502 9932 3498 9935
      3491 9929 3487 9932 3482 9924 3483 9922
      3471 9916 3438 9946 3439 9947 3436 9947
      3409 9973 3410 9976 3423 10000
TIME...MOT...LOC 0350Z 305DEG 25KT 3479 9983 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...80MPH
 
$$

..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 1 minute earlier.

Area forecast discussion, Jul 15, 8:33 PM CDT, 2 hours 1 minute 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, 8:12 PM CDT, 2 hours 22 minutes before

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

OKZ004>048-050>052-TXZ083>090-170115-
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-
812 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.

LOCATION...
AN ENHANCED RISK COVERS AN AREA WEST AND NORTH OF A LINE FROM
FREEDOM AND CLINTON... TO HOBART AND ALTUS OKLAHOMA... TO GOODLETT
TEXAS. A SLIGHT RISK AREA IS WEST AND NORTH OF A LINE FROM
CHEROKEE AND WATONGA... TO LAWTON AND FREDERICK OKLAHOMA... TO
VERNON AND BENJAMIN TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE THROUGH 3 AM
SATURDAY.

IMPACTS...
HAIL UP TO THE SIZE OF GOLF BALLS AND 75 MPH WINDS WILL BE
POSSIBLE WITH THE STRONGER STORMS. LOCALLY HEAVY RAINFALL WITH
SOME FLOODING IS ALSO POSSIBLE.

DISCUSSION...
A COMPLEX OF STORMS WILL CONTINUE TO MOVE SOUTH AND SOUTHEAST
ACROSS PARTS OF OKLAHOMA AND WESTERN NORTH TEXAS THROUGH EARLY
SATURDAY. THE MOST LIKELY AREAS TO BE AFFECTED WILL BE IN WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS. SOME OF THE STORMS WILL BE
STRONG TO SEVERE. DAMAGING WINDS AND LARGE HAIL WILL BE POSSIBLE
WITH THE STRONGER STORMS.

.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, 9:46 PM CDT, 48 minutes before

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

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

0940 PM     TSTM WND GST     4 WNW CAMARGO           36.04N 99.35W
07/15/2016  M58 MPH          DEWEY              OK   MESONET

&&

FM

Local storm report, Jul 15, 9:51 PM CDT, 43 minutes before

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

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

0945 PM     TSTM WND GST     4 WNW CAMARGO           36.04N 99.35W
07/15/2016  M65 MPH          DEWEY              OK   MESONET

&&

EM

Local storm report, Jul 15, 9:55 PM CDT, 39 minutes before

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

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

0950 PM     TSTM WND GST     4 WNW CAMARGO           36.04N 99.35W
07/15/2016  M60 MPH          DEWEY              OK   MESONET

&&

EM

Local storm report, Jul 15, 10:02 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1002 PM CDT FRI JUL 15 2016

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

0955 PM     TSTM WND GST     4 WNW CAMARGO           36.04N 99.35W
07/15/2016  M62 MPH          DEWEY              OK   MESONET

&&

EM

Local storm report, Jul 15, 10:17 PM CDT, 17 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, 9 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

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, 10:43 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, 11:13 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Tillman	47 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.