Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 296, NWS Norman, OK

May 16, 2017Greer County, Jackson County, Kiowa County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 16, 2017, 7:26 PM CDT for Greer County, Jackson County, Kiowa County, Oklahoma. It was in force for 49 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: May 16, 2017, 7:26 PM CDT (00:26 UTC)
Expired: May 16, 2017, 8:15 PM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Greer County, OK, Jackson County, OK, Kiowa County, OK

The radar

The Altus AFB radar (KFDR), 62 km from the middle of the area, began a volume at 00:30 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 16, 1:54 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.4 hours before the alert went out and 185 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: 768 J/kg
Mixed-layer CIN: -307 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 308 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

920 
WUUS54 KOUN 170026
SVROUN
OKC055-065-075-170115-
/O.NEW.KOUN.SV.W.0296.170517T0026Z-170517T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
726 PM CDT TUE MAY 16 2017

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jackson County in southwestern Oklahoma...
  Northwestern Kiowa County in southwestern Oklahoma...
  Southeastern Greer County in southwestern Oklahoma...

* Until 815 PM CDT

* At 726 PM CDT, a severe thunderstorm was located 5 miles northwest
  of Martha, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Blair, Lone Wolf, Warren, Hester and Altus-Lugert Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3471 9951 3479 9957 3508 9918 3480 9911
TIME...MOT...LOC 0026Z 233DEG 26KT 3476 9947 

HAIL...1.25IN
WIND...60MPH
 
$$

MAHALE

2 follow-up statements

975 
WWUS54 KOUN 170038
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
738 PM CDT TUE MAY 16 2017

OKC055-065-075-170115-
/O.CON.KOUN.SV.W.0296.000000T0000Z-170517T0115Z/
Jackson OK-Kiowa OK-Greer OK-
738 PM CDT TUE MAY 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHEASTERN JACKSON...NORTHWESTERN KIOWA AND SOUTHEASTERN GREER
COUNTIES...

At 738 PM CDT, a severe thunderstorm was located near Blair, moving
northeast at 30 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Blair, Lone Wolf, Warren, Hester and Altus-Lugert Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3474 9938 3485 9950 3508 9918 3480 9911
TIME...MOT...LOC 0038Z 233DEG 26KT 3482 9938 

HAIL...1.25IN
WIND...60MPH
 
$$

MAHALE

276 
WWUS54 KOUN 170055
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
755 PM CDT TUE MAY 16 2017

OKC055-065-075-170115-
/O.CON.KOUN.SV.W.0296.000000T0000Z-170517T0115Z/
Jackson OK-Kiowa OK-Greer OK-
755 PM CDT TUE MAY 16 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHEASTERN JACKSON...NORTHWESTERN KIOWA AND EAST CENTRAL GREER
COUNTIES...

At 755 PM CDT, a severe thunderstorm was located 7 miles south of
Lone Wolf, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Lone Wolf and Altus-Lugert Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3478 9932 3497 9933 3508 9918 3482 9912
TIME...MOT...LOC 0055Z 232DEG 26KT 3489 9924 

HAIL...1.00IN
WIND...60MPH
 
$$

MAHALE

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 16, 6:16 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, May 16, 6:16 PM CDT, 1 hour 10 minutes before

Area Forecast Discussion
National Weather Service Norman OK
616 PM CDT Tue May 16 2017

.AVIATION...
Isolated severe storms entering western Oklahoma may pass near
western TAF sites. Later tonight, after 3z, a line of storms is
expected to form and march eastward through the area, eventually
affecting most TAF sites. Ceilings will continue to bounce between
MVFR and VFR into the evening before clearing out with the
approaching convection. Winds will remain southerly and gusty.

Day

&&

.PREV DISCUSSION... /issued 216 PM CDT Tue May 16 2017/

DISCUSSION...
We are getting the package out early as things will start getting
busy before too long. As as been discussed for days, a severe
weather event is setting up for this evening, and storms have
already formed on the dryline in the Texas panhandle. Expected
isolated to widely scattered storms along the dryline this evening
moving into western sections of the area. Supercells will be
likely. The airmass will be conducive to tornado potential as
well, especially in the far west. High-resolution models weaken
these storms by mid-late evening as they move northeast, but am
somewhat skeptical how fast these initial storms will diminish.
Regardless, also expect a second wave of storms to form out west
in the mid-late evening. This wave of storms will likely be more
widespread and perhaps become a linear system as they spread east
and northeast. Severe weather will continue to be possible with
these storms overnight.

We will see a break in the thunderstorm activity on Wednesday as
the initial wave moves northeast of the area. But alas, this
respite will be short-lived as the next longwave trough approaches
the area. Severe storms will again be possible Thursday and
Friday. The cold front associated with this system moves through
the area overnight Friday night and Saturday morning with cooler
weather moving in. But the we will continue to have broad
troughing in the Plains, so precipitation chances will persist
into next week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  63  83  63  85 /  70  10  10  30
Hobart OK         59  86  58  87 /  70   0   0  40
Wichita Falls TX  63  89  64  89 /  70   0   0  40
Gage OK           57  82  55  85 /  50   0   0  20
Ponca City OK     64  83  61  85 /  60  20   0  20
Durant OK         68  86  70  86 /  50  20  10  20

&&

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

14

Hazardous weather outlook, May 16, 12:05 PM CDT, 7 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1205 PM CDT Tue May 16 2017

OKZ004>048-050>052-TXZ083>090-171715-
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-
1205 PM CDT Tue May 16 2017

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...This Afternoon and Tonight...

.Thunderstorms...
There is a moderate risk for severe thunderstorms for portions of
western Oklahoma and western sections of north Texas. There is
also a slight to enhanced risk over a broader area of central and
western Oklahoma and western north Texas.

Location...
The moderate risk is west of a line from Freedom Oklahoma to
Seiling to Clinton to Altus Oklahoma to Crowell Texas.

East of the moderate risk area, there are slight and enhanced
risks of severe weather west of a line from Stroud to Pauls Valley
to Ardmore, and also includes the remainder of the western section
of north Texas.

There is a marginal risk of severe storms across southeast
Oklahoma.

Timing...
The most likely time for severe weather is 5 PM through sunrise
Wednesday morning.

Impacts...
Hail up the size of tennis balls and thunderstorm wind gusts over
70 mph will be the primary threats. Tornadoes will also be
possible, especially across the moderate risk area of far western
Oklahoma and western north Texas.

Discussion...
Scattered thunderstorms are expected to develop this afternoon
near a dry line in the eastern Texas panhandle, then move
northeast into western Oklahoma and western north Texas late this
afternoon and this evening. Instability will be high and wind
shear will be sufficient to produce supercell thunderstorms with
the associated risk of large hail, damaging winds and the
possibility of tornadoes. The highest potential of severe weather
will be across the moderate risk area.

Another round of thunderstorms is expected to develop across the
eastern panhandles or western sections of Oklahoma and north Texas
late this evening. These thunderstorms will likely develop into a
line of storms that moves northeast and east across much of the
area overnight. This line of storms will be capable of producing
damaging winds and hail with the severe weather potential
persisting through the overnight hours.

Spotter and Emergency Management Statement...
Storm spotter groups and emergency management personnel across
western and central Oklahoma and adjacent parts of north Texas
should prepare for severe weather operations late this afternoon
and overnight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
Thunderstorms may linger into the morning hours Wednesday before
moving out of the area.

Storm chances return on Thursday and will persist at times through
the weekend and into Monday. Severe weather will be possible
Thursday and Friday.

.Heavy Rainfall...
There is a potential for high rain totals late Thursday through
Friday night, mainly over south-central and southeast Oklahoma. If
you live in an area that is prone to flash flooding, pay close
attention to the forecasts and warnings later this week.

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, May 16, 6:59 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
659 PM CDT TUE MAY 16 2017

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

0657 PM     HAIL             5 N CARTER              35.29N 99.50W
05/16/2017  E4.00 INCH       BECKHAM            OK   TRAINED SPOTTER

&&

JPIKE

Local storm report, May 16, 7:02 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
702 PM CDT TUE MAY 16 2017

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

0629 PM     HAIL             8 S ERICK               35.10N 99.87W
05/16/2017  E2.75 INCH       BECKHAM            OK   STORM CHASER

&&

JPIKE

Local storm report, May 16, 7:09 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
709 PM CDT TUE MAY 16 2017

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

0706 PM     TSTM WND DMG     6 ESE REYDON            35.62N 99.82W
05/16/2017                   ROGER MILLS        OK   STORM CHASER

            POWER POLES DOWNED

&&

JPIKE

Local storm report, May 16, 7:12 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
712 PM CDT TUE MAY 16 2017

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

0708 PM     TSTM WND DMG     1 N CARTER              35.23N 99.51W
05/16/2017                   BECKHAM            OK   FIRE DEPT/RESCUE

            POWER LINES AND DEBRIS ON HWY 34.

&&

JP

Local storm report, May 16, 7:21 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
721 PM CDT TUE MAY 16 2017

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

0710 PM     TSTM WND GST     5 S ELK CITY            35.34N 99.42W
05/16/2017  M68 MPH          BECKHAM            OK   MESONET

&&

JPIKE

Local storm report, May 16, 7:23 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
723 PM CDT TUE MAY 16 2017

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

0715 PM     TSTM WND GST     5 S ELK CITY            35.34N 99.42W
05/16/2017  M74 MPH          BECKHAM            OK   MESONET

&&

JPIKE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:08 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	OUN	Beckham, Washita	37 min
May 16, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	37 min
May 16, 7:25 PM CDT	Tornado Warning	OUN	Custer, Washita	35 min
May 16, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major, Woods, Woodward	48 min
May 16, 7:55 PM CDT	Tornado Warning	OUN	Custer	35 min
May 16, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	48 min
May 16, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	42 min
May 16, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	47 min
May 16, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	42 min
May 16, 8:33 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major	42 min
May 16, 8:33 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	42 min
May 16, 8:44 PM CDT	Special Weather Statement	OUN	Blaine	31 min
May 16, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Major, Woodward	52 min
May 16, 9:03 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	42 min
May 16, 9:36 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	39 min
May 16, 9:39 PM CDT	Severe Thunderstorm Warning	OUN	Major	51 min
May 16, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	44 min
May 16, 9:51 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Ellis, Roger Mills	39 min
May 16, 9:53 PM CDT	Areal Flood Advisory	OUN	Dewey, Major, Roger Mills	3 hr
May 16, 9:57 PM CDT	Areal Flood Advisory	OUN	Roger Mills	3 hr
May 16, 10:02 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	28 min
May 16, 10:07 PM CDT	Special Weather Statement	OUN	Kiowa	38 min
May 16, 10:17 PM CDT	Flash Flood Warning	OUN	Roger Mills	3 hr
May 16, 10:22 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	53 min
May 16, 10:27 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Dewey, Ellis, Roger Mills, Woodward	48 min
May 16, 11:04 PM CDT	Special Weather Statement	OUN	Comanche	26 min
May 16, 11:14 PM CDT	Flash Flood Warning	OUN	Dewey, Woodward	2 hr
May 16, 11:16 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	44 min
May 16, 11:19 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	41 min
May 16, 11:26 PM CDT	Areal Flood Advisory	OUN	Custer, Roger Mills	3 hr
May 16, 11:34 PM CDT	Special Weather Statement	OUN	Woods	26 min
May 16, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady, Stephens	49 min
May 16, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	49 min
May 17, 12:03 AM CDT	Special Weather Statement	OUN	Cotton, Tillman	27 min
May 17, 12:17 AM CDT	Wind Advisory	OUN	Blaine, Caddo, Canadian, Cleveland, Comanche, Custer and 11 more	103 min
May 17, 12:32 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	43 min
May 17, 12:46 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, Stephens	29 min
May 17, 1:02 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	28 min
May 17, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	33 min
May 17, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Pottawatomie	46 min
May 17, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Comanche, Garvin, Grady, Jefferson, McClain and 2 more	31 min
May 17, 1:31 AM CDT	Special Weather Statement	OUN	Payne	29 min
May 17, 1:43 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Cleveland, Garvin, McClain, Murray, Pontotoc and 2 more	47 min
May 17, 2:54 AM CDT	Special Weather Statement	OUN	Love	36 min
May 17, 6:28 AM CDT	River Flood Warning	OUN	Dewey, Major, Woodward	25 hr
May 17, 10:04 AM CDT	Wind Advisory	OUN	Alfalfa, Blaine, Canadian, Custer, Dewey, Ellis and 14 more	6 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.