Alert archive / Oklahoma / Tornado Warnings in 2017

Tornado Warning 19, NWS Norman, OK

May 11, 2017Lincoln County, Payne County, Oklahoma

NWS Norman, OK issued this tornado warning at May 11, 2017, 3:09 PM CDT for Lincoln County, Payne County, Oklahoma. It was in force for 24 min. 1 report 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: May 11, 2017, 3:09 PM CDT (20:09 UTC)
Expired: May 11, 2017, 3:33 PM CDT
In force: 24 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.75 in

Counties Lincoln County, OK, Payne County, OK

The radar

The Norman radar (KTLX), 75 km from the middle of the area, began a volume at 20:12 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
May 11, 3:13 PM CDT	TORNADO	1 Sw Perkins, OK	NUMEROUS SPOTTERS AND CHASERS REPORTED A TORNADO JUST SOUTHWEST OF PERKINS. THE SPECIFIC LOCATION IS ESTIMATED.

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 one storm report to this tornado warning; the first came 4 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
May 11, 12:56 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.2 hours before the alert went out and 91 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: 592 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1262 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

903 
WFUS54 KOUN 112009
TOROUN
OKC081-119-112045-
/O.NEW.KOUN.TO.W.0019.170511T2009Z-170511T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
309 PM CDT THU MAY 11 2017

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Northern Lincoln County in central Oklahoma...
  Southeastern Payne County in central Oklahoma...

* Until 345 PM CDT
    
* At 309 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Perkins, moving east at 30 mph.

  HAZARD...Tornado and baseball size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Cushing, Perkins, Tryon, Ripley, Agra and Avery. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room or an interior
room on the lowest floor of a sturdy building. Avoid windows. If you
are outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3591 9712 3599 9714 3608 9673 3587 9670
TIME...MOT...LOC 2009Z 261DEG 27KT 3596 9705 

TORNADO...RADAR INDICATED
HAIL...2.75IN

$$

..speg.

1 follow-up statement

746 
WWUS54 KOUN 112033
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
333 PM CDT THU MAY 11 2017

OKC081-119-112042-
/O.CAN.KOUN.TO.W.0019.000000T0000Z-170511T2045Z/
Lincoln OK-Payne OK-
333 PM CDT THU MAY 11 2017

...THE TORNADO WARNING FOR NORTHERN LINCOLN AND SOUTHEASTERN PAYNE
COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the tornado warning has been 
cancelled. However, large hail and damaging winds remain likely and 
a Severe Thunderstorm Warning remains in effect for the area. The 
storm will continue to be watched closely for any additional 
strengthening.

LAT...LON 3591 9712 3599 9714 3608 9673 3587 9670
TIME...MOT...LOC 2031Z 261DEG 27KT 3599 9683 

$$

..speg.

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at May 11, 2:23 PM CDT, 46 minutes earlier.

Area forecast discussion, May 11, 2:23 PM CDT, 46 minutes before

Area Forecast Discussion
National Weather Service Norman OK
223 PM CDT Thu May 11 2017

.DISCUSSION...
Scattered to numerous thunderstorms have developed in an
increasingly unstable uncapped air mass across much of northern
Oklahoma. Steepening mid-level lapse rates as closed mid-upper low
approach and robust updrafts in a moderately unstable environment
will support large hail with these storms. A secondary threat will
be damaging winds. Weak low level shear will limit the tornado
threat, however a brief tornado cannot be ruled out where shear is
locally enhanced near boundaries.

Greatest thunderstorm coverage will generally be across northern
and eastern portions of the area through the evening and into
early tonight. Most of the showers and storms will shift east by
morning as mid-upper low moves east. Low clouds and stratus will
diminish during the morning. A warming trend is expected this
weekend as mean ridging builds in.

Next week looks more active as lead wave ejects northeast into the
plains on Tuesday bringing a threat of convection, including the
potential for severe weather. Medium range guidance diverges some
into mid-week on timing of lead wave and deep closed low in the
west. Periodic chances for thunderstorms, including severe
weather, can be expected across the area next week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  78  57  72  52 /  60  40  10   0
Hobart OK         78  55  75  50 /  20  10   0   0
Wichita Falls TX  86  58  78  53 /  20  10   0   0
Gage OK           68  48  71  47 /  60  10   0   0
Ponca City OK     75  56  72  50 /  80  60  10   0
Durant OK         80  60  74  55 /  50  30  10   0

&&

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

25/12

Hazardous weather outlook, May 11, 2:05 PM CDT, 1 hour 4 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
205 PM CDT Thu May 11 2017

OKZ004>048-050>052-TXZ083>090-121915-
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-
205 PM CDT Thu May 11 2017

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

.DAY ONE...Rest of This Afternoon and Tonight...

.Thunderstorms...
There is a slight risk of severe thunderstorms across portions of
Oklahoma into this evening.

Location...
The slight risk area is east of a line from Alva and Clinton to
Chickasha and Ada to Durant Oklahoma. A marginal risk is west of
the slight risk and east of a line from Buffalo to Elk City to
near Pauls Valley and Ardmore Oklahoma.

Timing...
Severe storms will be possible through 9 PM.

Impacts...
Large hail up to the size of tennis balls and damaging wind gusts
up to 70 mph will be possible. There is a low potential for a
tornado or two across portions of north central and central
Oklahoma.

Discussion...
Scattered showers and thunderstorms will continue to develop this
afternoon across portions of Oklahoma. Some of the storms could
become strong to severe across the risk areas with large hail and
strong winds the main concerns. However, a tornado or two can not
be ruled out in parts of north central and central Oklahoma.

The severe potential is expected to diminish this evening.

SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm
spotter groups and emergency management personnel across the risk
areas should prepare for severe weather operations this afternoon
and evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Thunderstorms...
Thunderstorm chances will return Monday and continue through at
least Wednesday. Strong to severe storms will be possible.

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, May 11, 2:38 PM CDT, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
238 PM CDT THU MAY 11 2017

OKZ006-112015-
Alfalfa OK-
238 PM CDT THU MAY 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Alfalfa County Until
315 PM CDT...

AT 235 PM CDT, a strong thunderstorm was located near Burlington,
moving east at 5 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3699 9824 3685 9834 3678 9854 3700 9854
TIME...MOT...LOC 1935Z 283DEG 4KT 3692 9845

BRB

Local storm report, May 11, 2:39 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
239 PM CDT THU MAY 11 2017

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

0238 PM     HAIL             1 E GUTHRIE             35.84N 97.41W
05/11/2017  E1.50 INCH       LOGAN              OK   STORM CHASER

&&

BRB

Local storm report, May 11, 2:51 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
251 PM CDT THU MAY 11 2017

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

0240 PM     HAIL             2 E GUTHRIE             35.88N 97.39W
05/11/2017  E1.50 INCH       LOGAN              OK   TRAINED SPOTTER

            I35 AND AND HWY 105

0245 PM     HAIL             1 WNW LANGSTON          35.95N 97.28W
05/11/2017  E2.00 INCH       LOGAN              OK   STORM CHASER

&&

DW

Local storm report, May 11, 2:59 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
259 PM CDT THU MAY 11 2017

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

0250 PM     HAIL             1 E LANGSTON            35.95N 97.25W
05/11/2017  E1.75 INCH       LOGAN              OK   STORM CHASER

0253 PM     HAIL             1 E LANGSTON            35.95N 97.25W
05/11/2017  E2.75 INCH       LOGAN              OK   STORM CHASER

0215 PM     HAIL             11 WNW HAMMON           35.69N 99.56W
05/11/2017  E1.00 INCH       ROGER MILLS        OK   PUBLIC

            NICKEL AND QUARTER HAIL

&&

DW

Special weather statement, May 11, 3:01 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
301 PM CDT THU MAY 11 2017

OKZ011-112015-
Major OK-
301 PM CDT THU MAY 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR south central Major County Until
315 PM CDT...

AT 300 PM CDT, a strong thunderstorm was located near Fairview. This
storm was nearly stationary.

HAZARDS INCLUDE...
Hail up to the size of nickels...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Storm intensity is increasing and severe weather may develop rapidly.
Stay alert and listen for warnings.

&&

LAT...LON 3617 9864 3632 9866 3643 9847 3630 9833
      3619 9833
TIME...MOT...LOC 2000Z 244DEG 2KT 3627 9853

BRB

Local storm report, May 11, 3:04 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
304 PM CDT THU MAY 11 2017

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

0256 PM     HAIL             COYLE                   35.95N 97.24W
05/11/2017  E4.25 INCH       LOGAN              OK   FIRE DEPT/RESCUE

0256 PM     TSTM WND GST     COYLE                   35.95N 97.24W
05/11/2017  E70 MPH          LOGAN              OK   FIRE DEPT/RESCUE

0256 PM     HAIL             LANGSTON                35.95N 97.26W
05/11/2017  E1.75 INCH       LOGAN              OK   LAW ENFORCEMENT

            UNIVERSITY POLICE

&&

DW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:07 PM CDT	Special Weather Statement	OUN	Kiowa	38 min
May 10, 7:20 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman	40 min
May 10, 7:23 PM CDT	Areal Flood Advisory	OUN	Caddo	3 hr
May 10, 7:36 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	54 min
May 10, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	48 min
May 10, 7:45 PM CDT	Areal Flood Advisory	OUN	Tillman	60 min
May 10, 7:55 PM CDT	Tornado Warning	OUN	Tillman	35 min
May 10, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	42 min
May 10, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	43 min
May 10, 8:28 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	62 min
May 10, 8:31 PM CDT	Tornado Warning	OUN	Cotton, Tillman	29 min
May 10, 8:37 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	38 min
May 10, 8:52 PM CDT	Areal Flood Advisory	OUN	Caddo, Grady	3 hr
May 10, 8:55 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Stephens	3 hr
May 10, 9:23 PM CDT	Special Weather Statement	OUN	Oklahoma	37 min
May 10, 9:29 PM CDT	Special Weather Statement	OUN	Stephens	31 min
May 10, 9:36 PM CDT	Special Weather Statement	OUN	Payne	24 min
May 10, 9:39 PM CDT	Special Weather Statement	OUN	Cleveland	36 min
May 10, 9:42 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	18 min
May 10, 9:53 PM CDT	Special Weather Statement	OUN	McClain	37 min
May 10, 9:56 PM CDT	Special Weather Statement	OUN	Stephens	34 min
May 10, 9:57 PM CDT	Special Weather Statement	OUN	Caddo	33 min
May 10, 10:20 PM CDT	Special Weather Statement	OUN	Cleveland, Garvin, Pottawatomie	40 min
May 10, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Stephens	39 min
May 10, 10:38 PM CDT	Special Weather Statement	OUN	Grady	37 min
May 10, 10:41 PM CDT	Special Weather Statement	OUN	Caddo	34 min
May 10, 10:45 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Hughes, Pottawatomie, Seminole	31 min
May 10, 10:49 PM CDT	Special Weather Statement	OUN	Caddo	26 min
May 10, 11:12 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Pontotoc, Pottawatomie	48 min
May 11, 3:14 AM CDT	Special Weather Statement	OUN	Grady	31 min
May 11, 3:55 AM CDT	Special Weather Statement	OUN	Stephens	35 min
May 11, 5:06 AM CDT	Special Weather Statement	OUN	McClain	24 min
May 11, 10:44 AM CDT	Special Weather Statement	OUN	Harper	31 min
May 11, 10:50 AM CDT	Severe Thunderstorm Warning	OUN	Harper	40 min
May 11, 12:03 PM CDT	Special Weather Statement	OUN	Harper	27 min
May 11, 12:28 PM CDT	Special Weather Statement	OUN	Grant	32 min
May 11, 12:30 PM CDT	Special Weather Statement	OUN	Harper	30 min
May 11, 12:57 PM CDT	Special Weather Statement	OUN	Woodward	33 min
May 11, 1:04 PM CDT	Special Weather Statement	OUN	Blaine	26 min
May 11, 1:17 PM CDT	Special Weather Statement	OUN	Kingfisher	28 min
May 11, 1:24 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	51 min
May 11, 1:27 PM CDT	Special Weather Statement	OUN	Grant	33 min
May 11, 1:29 PM CDT	Special Weather Statement	OUN	Woodward	31 min
May 11, 1:38 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	52 min
May 11, 1:40 PM CDT	Special Weather Statement	OUN	Payne	35 min
May 11, 1:44 PM CDT	Special Weather Statement	OUN	Garfield	31 min
May 11, 1:48 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	42 min
May 11, 1:59 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	31 min
May 11, 2:00 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	45 min
May 11, 2:03 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	42 min
May 11, 2:06 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	39 min
May 11, 2:07 PM CDT	Areal Flood Advisory	OUN	Kingfisher	113 min
May 11, 2:19 PM CDT	Severe Thunderstorm Warning	OUN	Noble	41 min
May 11, 2:20 PM CDT	Areal Flood Advisory	OUN	Grant	3 hr
May 11, 2:24 PM CDT	Special Weather Statement	OUN	Custer	36 min
May 11, 2:26 PM CDT	Areal Flood Advisory	OUN	Logan	2 hr
May 11, 2:26 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	49 min
May 11, 2:30 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	45 min
May 11, 2:38 PM CDT	Special Weather Statement	OUN	Alfalfa	37 min
May 11, 2:38 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	52 min
May 11, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	50 min
May 11, 2:44 PM CDT	Severe Thunderstorm Warning	OUN	Noble	46 min
May 11, 2:50 PM CDT	Tornado Warning	OUN	Logan, Noble, Payne	25 min
May 11, 2:57 PM CDT	Severe Thunderstorm Warning	OUN	Kay	48 min
May 11, 3:01 PM CDT	Special Weather Statement	OUN	Major	14 min
May 11, 3:01 PM CDT	Severe Thunderstorm Warning	OUN	Custer	44 min
May 11, 3:08 PM CDT	Areal Flood Advisory	OUN	Logan, Noble, Payne	2 hr
May 11, 3:11 PM CDT	Tornado Warning	OUN	Noble, Payne	20 min
May 11, 3:13 PM CDT	Special Weather Statement	OUN	Woods	32 min
May 11, 3:16 PM CDT	Special Weather Statement	OUN	Alfalfa	29 min
May 11, 3:16 PM CDT	Severe Thunderstorm Warning	OUN	Major	44 min
May 11, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	19 min
May 11, 3:28 PM CDT	Special Weather Statement	OUN	Dewey	32 min
May 11, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	47 min
May 11, 3:31 PM CDT	Flash Flood Warning	OUN	Noble	5 hr
May 11, 3:32 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	43 min
May 11, 3:39 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey	51 min
May 11, 3:43 PM CDT	Areal Flood Advisory	OUN	Kay, Noble	2 hr
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	47 min
May 11, 3:53 PM CDT	Severe Thunderstorm Warning	OUN	Custer	37 min

Nearby

Tornado Warnings in Oklahoma, 2017 Every tornado warning in 2017 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.