Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 261, NWS Norman, OK

May 29, 2018Alfalfa County, Major County, Woods County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 29, 2018, 7:43 PM CDT for Alfalfa County, Major County, Woods County, Oklahoma. It was in force for 47 min. 4 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: May 29, 2018, 7:43 PM CDT (00:43 UTC)
Expired: May 29, 2018, 8:30 PM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 2.0 in
Wind: 70.0 mph

Counties Alfalfa County, OK, Major County, OK, Woods County, OK

The radar

The Vance AFB radar (KVNX), 61 km from the middle of the area, began a volume at 00:44 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
May 29, 7:49 PM CDT	HAIL 2.5	7 Ese Waynoka, OK
May 29, 7:50 PM CDT	TSTM WND GST 71	7 Ssw Alva, OK
May 29, 7:55 PM CDT	HAIL 1.75	10 Ese Waynoka, OK
May 29, 8:10 PM CDT	HAIL 1	1 W Carmen, 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 4 storm reports to this severe thunderstorm warning; the first came 6 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 29, 2:19 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.7 hours before the alert went out and 168 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: 580 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1396 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

027 
WUUS54 KOUN 300043
SVROUN
OKC003-093-151-300130-
/O.NEW.KOUN.SV.W.0261.180530T0043Z-180530T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
743 PM CDT TUE MAY 29 2018

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Woods County in northwestern Oklahoma...
  Southwestern Alfalfa County in northwestern Oklahoma...
  Northwestern Major County in northwestern Oklahoma...

* Until 830 PM CDT

* At 743 PM CDT, a severe thunderstorm was located 4 miles northeast
  of Waynoka, moving southeast at 15 mph.

  HAZARD...Two inch 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...
  Alva, Waynoka, Carmen, Cleo Springs, Aline, Dacoma, Avard, Orienta,
  Hopeton and Bouse Junction.

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 3635 9839 3637 9888 3656 9896 3660 9896
      3661 9898 3676 9905 3686 9857
TIME...MOT...LOC 0043Z 305DEG 11KT 3661 9881 

HAIL...2.00IN
WIND...70MPH
 
$$

30

1 follow-up statement

521 
WWUS54 KOUN 300111
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
811 PM CDT TUE MAY 29 2018

OKC003-093-151-300130-
/O.CON.KOUN.SV.W.0261.000000T0000Z-180530T0130Z/
Woods OK-Alfalfa OK-Major OK-
811 PM CDT TUE MAY 29 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHEASTERN WOODS...SOUTHWESTERN ALFALFA AND NORTHWESTERN MAJOR
COUNTIES...

At 811 PM CDT, a severe thunderstorm was located 8 miles west of
Aline, moving southeast at 20 mph.

HAZARD...Two inch 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...
Alva, Waynoka, Carmen, Cleo Springs, Aline, Dacoma, Avard, Orienta
and Hopeton.

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 3636 9873 3656 9896 3660 9896 3661 9898
      3676 9905 3686 9857 3635 9839
TIME...MOT...LOC 0111Z 302DEG 17KT 3651 9860 

HAIL...2.00IN
WIND...70MPH
 
$$

30

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 29, 6:32 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, May 29, 6:32 PM CDT, 1 hour 11 minutes before

Area Forecast Discussion
National Weather Service Norman OK
632 PM CDT Tue May 29 2018

.DISCUSSION...

&&

.AVIATION...
Severe thunderstorms are expected to affect west central and
northern Oklahoma until early Wednesday morning. Large hail early
this evening then strong winds are possible as the individual
storms become a larger complex on their way east. Apart from
thunderstorms and during the day Wednesday, VFR conditions and
moderate southeast winds are expected.

&&

.PREV DISCUSSION... /issued 235 PM CDT Tue May 29 2018/

DISCUSSION...
Expect storms to develop within the next couple of hours across
northwest Oklahoma with the potential of isolated to scattered
storms south along the dryline. We will likely see some severe
storms late this afternoon and this evening. Storms in northwest
Oklahoma and southwest Kansas are expected to evolve into a storm
complex that will move east and southeast toward north central and
central Oklahoma. The latest hazardous weather outlook has our
current thinking on this evolution and expected types of severe
weather. Have likely POPs associated with this complex overnight.
Storms will likely be east of our area by 12z. We may see another
complex is expected to move across northern Oklahoma on Wednesday
evening. Otherwise, hot temperatures are expected through much of
the week with not-quite-as-hot temperatures expected by this
weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  70  93  74  98 /  40  10  10   0
Hobart OK         70  98  73 105 /  20   0  10   0
Wichita Falls TX  74 100  77 104 /  10   0   0   0
Gage OK           65  90  66  98 /  50   0  30  10
Ponca City OK     68  91  71  93 /  70  10  70  20
Durant OK         72  93  74  95 /  30  10   0   0

&&

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

09/09/09

Hazardous weather outlook, May 29, 5:52 PM CDT, 1 hour 51 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
552 PM CDT Tue May 29 2018

OKZ004>048-050>052-TXZ083>090-301100-
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-
552 PM CDT Tue May 29 2018

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

.DAY ONE...Tonight...

.Thunderstorms...
There is a enhanced risk of severe thunderstorms tonight.

.Location...
The enhanced risk is northwest of a line from Blackwell to
Kingfisher to Fort Cobb to Erick. South and east of the enhanced
risk area, there is a slight risk of severe thunderstorms to Tulsa,
McAlester, Sulphur, Walters, and Altus. There is a marginal risk of
severe thunderstorms for the rest of Oklahoma and adjacent parts of
northern Texas.

.Timing...
The most likely time for severe storms is until 3 am Wednesday.

.Impacts...
Hail to the size of baseballs and damaging wind gusts up to 80 mph
are the primary hazards. There is a low potential for tornadoes,
mainly with isolated storms in the early evening in northwestern
Oklahoma. There is a slight risk for excessive rainfall which would
cause flash flooding in northern, central, and southeastern Oklahoma.

.Discussion...
Scattered storms will move east of a dry line across western
Oklahoma this evening. The most likely area for further thunderstorm
development will be in northwestern Oklahoma, although isolated
thunderstorms may form farther south toward southwestern Oklahoma.

Through the evening, storms in northwestern Oklahoma and
southwestern Kansas are expected to evolve into a storm complex that
will spread east and southeast through the enhanced risk and slight
risk areas until early Wednesday morning.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel should
prepare for severe weather operations through early Wednesday.

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

.Thunderstorms...
A few thunderstorms will remain possible over central, eastern,
and southeastern Oklahoma through Wednesday morning. Scattered
thunderstorms may then develop across northern Oklahoma Wednesday
night through early Thursday morning.

.Heat...
Excessively hot conditions are expected across the western half of
Oklahoma and adjacent parts of northern Texas in the second half of
the week. Daytime temperatures will range 15 to 25 degrees above
normal late-Spring values.

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 29, 6:37 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
637 PM CDT TUE MAY 29 2018

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

0630 PM     HAIL             CAMP HOUSTON            36.82N 99.12W
05/29/2018  E1.75 INCH       WOODS              OK   PUBLIC

&&

DW

Local storm report, May 29, 6:44 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
644 PM CDT TUE MAY 29 2018

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

0639 PM     HAIL             8 W BUFFALO             36.83N 99.77W
05/29/2018  E1.00 INCH       HARPER             OK   TRAINED SPOTTER

&&

DW

Local storm report, May 29, 6:54 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
654 PM CDT TUE MAY 29 2018

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

0645 PM     TSTM WND GST     3 SSW FREEDOM           36.73N 99.13W
05/29/2018  M64 MPH          WOODWARD           OK   MESONET

&&

DW

Local storm report, May 29, 7:16 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
716 PM CDT TUE MAY 29 2018

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

0705 PM     TSTM WND GST     3 SSW FREEDOM           36.73N 99.13W
05/29/2018  M61 MPH          WOODWARD           OK   MESONET

&&

DW

Local storm report, May 29, 7:38 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
738 PM CDT TUE MAY 29 2018

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

0725 PM     TSTM WND GST     7 SSW ALVA              36.71N 98.72W
05/29/2018  M59 MPH          WOODS              OK   MESONET

&&

DW

Local storm report, May 29, 7:43 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
743 PM CDT TUE MAY 29 2018

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

0731 PM     TORNADO          3 SSE WAYNOKA           36.54N 98.86W
05/29/2018                   WOODS              OK   STORM CHASER

            BRIEF TORNADO TOUCHDOWN.

&&

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 7:24 PM CDT	Tornado Warning	OUN	Woods	36 min
May 29, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	48 min
May 29, 7:51 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	39 min
May 29, 7:57 PM CDT	Tornado Warning	OUN	Beckham, Greer	37 min
May 29, 8:01 PM CDT	Areal Flood Advisory	OUN	Beckham	3 hr
May 29, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	45 min
May 29, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major, Woods	39 min
May 29, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Woods	51 min
May 29, 8:41 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	49 min
May 29, 8:54 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Kiowa, Roger Mills, Washita	51 min
May 29, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	49 min
May 29, 9:06 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	39 min
May 29, 9:09 PM CDT	Areal Flood Advisory	OUN	Woods	3 hr
May 29, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	49 min
May 29, 9:26 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	49 min
May 29, 9:37 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	38 min
May 29, 9:41 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	49 min
May 29, 9:41 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	49 min
May 29, 9:43 PM CDT	Severe Thunderstorm Warning	OUN	Beckham	47 min
May 29, 10:10 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods	15 min
May 29, 10:12 PM CDT	Severe Thunderstorm Warning	OUN	Kay	33 min
May 29, 10:18 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa	42 min
May 29, 10:30 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	45 min
May 29, 11:00 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	45 min
May 29, 11:00 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	45 min
May 29, 11:18 PM CDT	Special Weather Statement	OUN	Payne	42 min
May 29, 11:23 PM CDT	Areal Flood Advisory	OUN	Garfield	67 min
May 29, 11:29 PM CDT	Special Weather Statement	OUN	Noble	46 min
May 29, 11:34 PM CDT	Special Weather Statement	OUN	Lincoln	41 min
May 29, 11:37 PM CDT	Severe Thunderstorm Warning	OUN	Payne	38 min
May 29, 11:42 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	48 min
May 29, 11:54 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	51 min
May 30, 12:00 AM CDT	Special Weather Statement	OUN	Logan	30 min
May 30, 12:09 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Noble, Payne	37 min
May 30, 12:12 AM CDT	Special Weather Statement	OUN	Hughes, Seminole	33 min
May 30, 12:29 AM CDT	Special Weather Statement	OUN	Lincoln	31 min
May 30, 12:33 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Grady, Murray, Stephens	42 min
May 30, 12:49 AM CDT	Special Weather Statement	OUN	Lincoln	26 min
May 30, 1:04 AM CDT	Special Weather Statement	OUN	Grady	41 min
May 30, 1:07 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	52 min
May 30, 1:16 AM CDT	Special Weather Statement	OUN	Stephens	44 min
May 30, 1:45 AM CDT	Special Weather Statement	OUN	Johnston, Marshall	45 min
May 30, 1:58 AM CDT	Special Weather Statement	OUN	Carter	47 min
May 30, 2:12 AM CDT	Special Weather Statement	OUN	McClain	33 min
May 30, 2:35 AM CDT	Special Weather Statement	OUN	Bryan, Marshall	55 min
May 30, 3:55 AM CDT	Special Weather Statement	OUN	Bryan	35 min
May 30, 3:59 AM CDT	Special Weather Statement	OUN	Johnston	31 min
May 30, 4:32 AM CDT	Special Weather Statement	OUN	Johnston, Murray	43 min
May 30, 4:55 AM CDT	Special Weather Statement	OUN	Murray	50 min
May 30, 5:15 AM CDT	Special Weather Statement	OUN	Johnston	60 min
May 30, 5:57 AM CDT	Special Weather Statement	OUN	Bryan	48 min
May 30, 6:16 AM CDT	Special Weather Statement	OUN	Bryan	44 min
May 30, 6:18 AM CDT	Special Weather Statement	OUN	Johnston	42 min
May 30, 6:30 AM CDT	Severe Thunderstorm Warning	OUN	Bryan, Johnston	45 min
May 30, 6:44 AM CDT	Areal Flood Advisory	OUN	Bryan	3 hr
May 30, 7:14 AM CDT	Special Weather Statement	OUN	Bryan	31 min
May 30, 2:40 PM CDT	River Flood Warning	OUN	Major, Woods, Woodward	10 hr
May 30, 4:12 PM CDT	Heat Advisory	OUN	Cotton, Harmon, Jackson, Tillman	29 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.