Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 640, NWS Norman, OK

July 13, 2016Grant County, Kay County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 13, 2016, 9:26 PM CDT for Grant County, Kay County, Oklahoma. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 13, 2016, 9:26 PM CDT (02:26 UTC)
Expired: Jul 13, 2016, 10:30 PM CDT
In force: 64 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.75 in
Wind: 70.0 mph

Counties Grant County, OK, Kay County, OK

The radar

The Vance AFB radar (KVNX), 81 km from the middle of the area, began a volume at 02:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.4 hours before the alert went out and 172 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: 3256 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

209 
WUUS54 KOUN 140226
SVROUN
OKC053-071-140330-
/O.NEW.KOUN.SV.W.0640.160714T0226Z-160714T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
926 PM CDT WED JUL 13 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KAY COUNTY IN NORTHERN OKLAHOMA...
  GRANT COUNTY IN NORTHERN OKLAHOMA...

* UNTIL 1030 PM CDT

* AT 925 PM CDT...THE LEADING EDGE OF SEVERE THUNDERSTORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 4 MILES SOUTHWEST OF NEWKIRK
  TO NEAR WAKITA...MOVING SOUTHEAST AT 10 MPH.

  HAZARD...GOLF BALL SIZE HAIL AND 70 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           CONSIDERABLE TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO 
           MOBILE HOMES...ROOFS...AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  PONCA CITY...BLACKWELL...TONKAWA...MEDFORD...NEWKIRK...
  POND CREEK...LAMONT...WAKITA...BRAMAN...NASH...DEER CREEK...
  MANCHESTER...KILDARE...RENFROW...JEFFERSON...NARDIN...CHILOCCO...
  MCCORD...WESTERN KAW LAKE AND BLACKWELL LAKE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 213 AND 236.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3674 9690 3668 9693 3670 9704 3668 9706
      3666 9707 3665 9806 3700 9808 3700 9695
TIME...MOT...LOC 0225Z 325DEG 9KT 3685 9712 3685 9789 

HAIL...1.75IN
WIND...70MPH
 
$$

MAXWELL

1 follow-up statement

083 
WWUS54 KOUN 140318
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1018 PM CDT WED JUL 13 2016

OKC053-071-140330-
/O.CON.KOUN.SV.W.0640.000000T0000Z-160714T0330Z/
KAY OK-GRANT OK-
1018 PM CDT WED JUL 13 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR KAY AND GRANT COUNTIES...

AT 1017 PM CDT...TWO SEVERE THUNDERSTORMS WERE LOCATED 5 MILES
NORTHWEST OF LAMONT AND 2 MILES NORTHWEST OF PONCA CITY...MOVING
SOUTHEAST AT 15 MPH.

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

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE SEVERELY INJURED. 
         EXPECT SHATTERED WINDOWS...EXTENSIVE DAMAGE TO ROOFS...
         SIDING...AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
PONCA CITY...BLACKWELL...TONKAWA...MEDFORD...NEWKIRK...POND CREEK...
LAMONT...BRAMAN...NASH...DEER CREEK...KILDARE...RENFROW...
JEFFERSON...NARDIN...CHILOCCO...MCCORD...WESTERN KAW LAKE...
BLACKWELL LAKE AND PECKHAM.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 213 AND 236.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. PREPARE IMMEDIATELY FOR LARGE DESTRUCTIVE
HAIL CAPABLE OF PRODUCING SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD
MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

&&

LAT...LON 3674 9690 3668 9693 3670 9704 3668 9706
      3666 9707 3665 9806 3700 9778 3700 9695
TIME...MOT...LOC 0317Z 299DEG 15KT 3675 9703 3675 9763 

HAIL...2.75IN
WIND...70MPH
 
$$

03

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 13, 9:11 PM CDT, 15 minutes earlier.

Area forecast discussion, Jul 13, 9:11 PM CDT, 15 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Norman OK
911 PM CDT WED JUL 13 2016

.UPDATE...
Increased PoPs across northeastern OK. Please see the discussion
below.

&&

.DISCUSSION...
A fairly stout supercell continues to track southward across Kay
Co. this evening along a cold front. Other storms were also trying
to develop west of the main supercell into NE Grant Co. Increased
PoPs to mid chance values here. Further south, across NW TX and
the SE TX panhandle, other storms again developed along a dryline
and moved east. However, given downstream environment these should
dissipate rather quickly with the onset of nightfall. Adjusted
winds slightly downward across the SW, but no other changes were
made to the forecast. All updated products have been sent.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  76  97  74  93 /  10  20  40  30
Hobart OK         77 102  75  97 /  10  20  30  30
Wichita Falls TX  79 103  78 100 /   0   0  20  30
Gage OK           71  98  69  90 /  20  50  40  30
Ponca City OK     74  94  71  88 /  30  50  70  30
Durant OK         78  96  76  95 /   0  10  20  30

&&

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

03/26

Hazardous weather outlook, Jul 13, 9:13 PM CDT, 13 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
913 PM CDT WED JUL 13 2016

OKZ004>048-050>052-TXZ083>090-150215-
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-
913 PM CDT WED JUL 13 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 SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT... MAINLY
BEFORE MIDNIGHT...ACROSS NORTHERN OKLAHOMA. THE SLIGHT RISK
COVERS LOCATIONS FROM JUST NORTH OF STILLWATER...AND EAST OF A
LINE FROM PERRY TO BLACKWELL. THE PRIMARY HAZARDS WILL BE
DAMAGING WINDS UP TO 65 MPH AND HAIL UP TO THE SIZE OF GOLFBALLS.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE MARGINAL RISK AREA SHOULD BE PREPARED FOR POSSIBLE SEVERE
WEATHER OPERATIONS LATE THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

.THUNDERSTORMS...
THUNDERSTORMS WILL BE POSSIBLE EACH DAY THROUGH SATURDAY. THE
HIGHEST CHANCES WILL BE OVER THE NORTHERN-HALF OF OKLAHOMA.

THERE IS A SLIGHT RISK OF SEVERE STORMS LATE THURSDAY INTO THE
EARLY MORNING HOURS FRIDAY ACROSS NORTHERN OKLAHOMA...ALONG WITH
A MARGINAL RISK EXTENDING SOUTH TO INTERSTATE-40. DAMAGING WIND
GUSTS UP TO 75 MPH AND HAIL UP TO TENNIS BALL SIZE WILL BE THE
PRIMARY HAZARDS...ALONG WITH HIGH RAIN TOTALS.

A MARGINAL RISK WILL BE SEEN ACROSS FAR NORTHERN OKLAHOMA ON
FRIDAY WITH DAMAGING WINDS AND HAIL POSSIBLE WITH THE STRONGEST
STORMS.

.HEAT...
AFTERNOON HEAT INDICES OF 100 TO 108 ARE POSSIBLE ACROSS OKLAHOMA
AND WESTERN NORTH TEXAS ON THURSDAY. HEAT SAFETY GUIDELINES
SHOULD BE FOLLOWED TO AVOID HEAT RELATED ILLNESS. SLIGHTLY COOLER
TEMPERATURES AND HEAT INDICES ARE EXPECTED FRIDAY AND
SATURDAY...BEFORE A RETURN TO A PROLONGED PERIOD OF HOT
TEMPERATURES RETURNS SUNDAY AND NEXT WEEK.

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, Jul 13, 8:11 PM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
811 PM CDT WED JUL 13 2016

OKZ008-140215-
KAY OK-
811 PM CDT WED JUL 13 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KAY COUNTY UNTIL 915
PM CDT...

AT 809 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTH OF
GEUDA SPRINGS...MOVING SOUTHEAST AT 20 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS OVER 50 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
NEWKIRK...CHILOCCO AND HARDY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE SITUATION CLOSELY. BE READY TO ACT QUICKLY IF A WARNING
IS ISSUED OR IF STORMS THREATEN YOU.

&&

LAT...LON 3699 9675 3699 9676 3685 9704 3700 9726
      3700 9677
TIME...MOT...LOC 0109Z 307DEG 16KT 3705 9715

03

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:11 PM CDT	Special Weather Statement	OUN	Kay	64 min
Jul 13, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Kay	73 min
Jul 13, 9:00 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	30 min
Jul 13, 9:42 PM CDT	Areal Flood Advisory	OUN	Kay	3 hr
Jul 13, 10:24 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	66 min
Jul 13, 10:35 PM CDT	Areal Flood Advisory	OUN	Grant, Kay	3 hr
Jul 13, 11:10 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Garfield, Grant, Kay, Kingfisher and 4 more	80 min
Jul 13, 11:47 PM CDT	Special Weather Statement	OUN	Kingfisher, Logan	13 min
Jul 14, 12:09 AM CDT	Special Weather Statement	OUN	Kingfisher, Lincoln, Logan	51 min
Jul 14, 12:18 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	72 min
Jul 14, 12:49 AM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	26 min
Jul 14, 1:13 AM CDT	Special Weather Statement	OUN	Canadian, Cleveland, Pottawatomie, Seminole	32 min
Jul 14, 1:30 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie, Seminole	22 min
Jul 14, 1:56 AM CDT	Special Weather Statement	OUN	Lincoln	49 min
Jul 14, 2:37 AM CDT	Special Weather Statement	OUN	Hughes	38 min
Jul 14, 3:12 AM CDT	Special Weather Statement	OUN	Hughes	33 min
Jul 14, 6:31 AM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Jul 14, 6:59 AM CDT	Special Weather Statement	OUN	Alfalfa	31 min
Jul 14, 7:04 AM CDT	Special Weather Statement	OUN	Love	26 min
Jul 14, 7:18 AM CDT	Special Weather Statement	OUN	Harper	27 min
Jul 14, 7:36 AM CDT	Special Weather Statement	OUN	Grant	24 min
Jul 14, 7:44 AM CDT	Special Weather Statement	OUN	Woods	31 min
Jul 14, 7:56 AM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	30 min
Jul 14, 9:10 AM CDT	Special Weather Statement	OUN	Grant	35 min
Jul 14, 9:35 AM CDT	Special Weather Statement	OUN	Grant	25 min
Jul 14, 10:17 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	43 min
Jul 14, 10:58 AM CDT	Severe Thunderstorm Warning	OUN	Kay	32 min
Jul 14, 11:22 AM CDT	Special Weather Statement	OUN	Payne	23 min
Jul 14, 12:08 PM CDT	Special Weather Statement	OUN	Lincoln	37 min
Jul 14, 1:41 PM CDT	Special Weather Statement	OUN	Hughes	34 min
Jul 14, 2:28 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	47 min
Jul 14, 3:12 PM CDT	Special Weather Statement	OUN	Atoka, Coal	33 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.