Alert archive / Oklahoma / Tornado Warnings in 2018

Tornado Warning 21, NWS Norman, OK

May 19, 2018Major County, Oklahoma

NWS Norman, OK issued this tornado warning at May 19, 2018, 6:53 PM CDT for Major County, Oklahoma. It was in force for 37 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 19, 2018, 6:53 PM CDT (23:53 UTC)
Expired: May 19, 2018, 7:30 PM CDT
In force: 37 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.0 in

County Major County, OK

The radar

The Vance AFB radar (KVNX), 59 km from the middle of the area, began a volume at 23:57 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 19, 6:58 PM CDT	HAIL 1.5	8 Wnw Fairview, OK	LOCATION ESTIMATED.
May 19, 7:10 PM CDT	HAIL 2.75	5 Wsw Orienta, OK
May 19, 7:20 PM CDT	HAIL 2.75	2 N Fairview, OK
May 19, 7:23 PM CDT	HAIL 2	3 S Orienta, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 19, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.9 hours before the alert went out and 160 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: 755 J/kg
Mixed-layer CIN: -268 J/kg
Mixed-layer LCL: 1934 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

881 
WFUS54 KOUN 192353
TOROUN
OKC093-200030-
/O.NEW.KOUN.TO.W.0021.180519T2353Z-180520T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
653 PM CDT SAT MAY 19 2018

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Central Major County in northwestern Oklahoma...

* Until 730 PM CDT
    
* At 653 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles west of Fairview, moving east at 20 mph.

  HAZARD...Tornado and hail up to two inches in diameter. 

  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...
  Fairview and Orienta. 

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 3637 9841 3624 9842 3624 9869 3636 9868
      3636 9860
TIME...MOT...LOC 2353Z 264DEG 18KT 3629 9861 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

WR

2 follow-up statements

289 
WWUS54 KOUN 200001
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
701 PM CDT SAT MAY 19 2018

OKC093-200030-
/O.CON.KOUN.TO.W.0021.000000T0000Z-180520T0030Z/
Major OK-
701 PM CDT SAT MAY 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CENTRAL
MAJOR COUNTY...
    
At 700 PM CDT, a severe thunderstorm capable of producing a tornado
was located 5 miles west of Fairview, moving east at 20 mph.

HAZARD...Tornado and two inch 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...
Fairview and Orienta. 

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 3637 9841 3624 9842 3625 9866 3635 9861
TIME...MOT...LOC 0000Z 264DEG 18KT 3629 9856 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

WR

278 
WWUS54 KOUN 200014
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
714 PM CDT SAT MAY 19 2018

OKC093-200030-
/O.CON.KOUN.TO.W.0021.000000T0000Z-180520T0030Z/
Major OK-
714 PM CDT SAT MAY 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CENTRAL
MAJOR COUNTY...
    
At 714 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Fairview, moving east at 20 mph.

HAZARD...Tornado and tennis ball 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...
Fairview.

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 3624 9842 3627 9857 3633 9854 3633 9841
TIME...MOT...LOC 0014Z 263DEG 17KT 3630 9849 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

WR

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 7:49 PM CDT	Severe Thunderstorm Warning	OUN	Harper	41 min
May 18, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	65 min
May 18, 8:16 PM CDT	Special Weather Statement	OUN	Beckham	29 min
May 18, 8:41 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	49 min
May 18, 8:49 PM CDT	Special Weather Statement	OUN	Beckham, Roger Mills	41 min
May 18, 9:15 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	45 min
May 18, 9:16 PM CDT	Special Weather Statement	OUN	Custer	29 min
May 18, 9:19 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Jackson, Kiowa, Washita	41 min
May 18, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	46 min
May 18, 10:15 PM CDT	Special Weather Statement	OUN	Alfalfa	30 min
May 18, 10:18 PM CDT	Special Weather Statement	OUN	Custer, Dewey	27 min
May 18, 10:33 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Woods	42 min
May 18, 10:42 PM CDT	Special Weather Statement	OUN	Garfield	33 min
May 18, 11:13 PM CDT	Special Weather Statement	OUN	Garfield	32 min
May 18, 11:14 PM CDT	Special Weather Statement	OUN	Grant	31 min
May 18, 11:24 PM CDT	Special Weather Statement	OUN	Blaine, Major	36 min
May 18, 11:26 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	49 min
May 19, 12:11 AM CDT	Special Weather Statement	OUN	Kay, Noble	34 min
May 19, 12:48 AM CDT	Special Weather Statement	OUN	Kay	27 min
May 19, 1:25 PM CDT	Special Weather Statement	OUN	Garfield	35 min
May 19, 1:33 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	42 min
May 19, 1:45 PM CDT	Special Weather Statement	OUN	Grant	30 min
May 19, 2:06 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kay, Noble	39 min
May 19, 2:08 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	44 min
May 19, 2:36 PM CDT	Special Weather Statement	OUN	Jackson	24 min
May 19, 2:38 PM CDT	Special Weather Statement	OUN	Major	52 min
May 19, 2:42 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	48 min
May 19, 2:47 PM CDT	Special Weather Statement	OUN	Kay	28 min
May 19, 2:47 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	43 min
May 19, 3:09 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Major	38 min
May 19, 3:12 PM CDT	Areal Flood Advisory	OUN	Harmon, Jackson	3 hr
May 19, 3:22 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	38 min
May 19, 3:24 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	36 min
May 19, 3:26 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	27 min
May 19, 3:40 PM CDT	Flash Flood Warning	OUN	Harmon, Jackson	6 hr
May 19, 3:46 PM CDT	Special Weather Statement	OUN	Garfield	14 min
May 19, 3:50 PM CDT	Special Weather Statement	OUN	Grant	25 min
May 19, 3:56 PM CDT	Special Weather Statement	OUN	Jackson	34 min
May 19, 3:58 PM CDT	Special Weather Statement	OUN	Kiowa	32 min
May 19, 3:58 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	47 min
May 19, 4:01 PM CDT	Special Weather Statement	OUN	Kiowa	29 min
May 19, 4:31 PM CDT	Special Weather Statement	OUN	Harmon	29 min
May 19, 4:36 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	39 min
May 19, 4:39 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	22 min
May 19, 4:46 PM CDT	Special Weather Statement	OUN	Kiowa	29 min
May 19, 4:56 PM CDT	Special Weather Statement	OUN	Payne	34 min
May 19, 5:02 PM CDT	Areal Flood Advisory	OUN	Harmon, Jackson	3 hr
May 19, 5:13 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	47 min
May 19, 5:45 PM CDT	Flash Flood Warning	OUN	Harmon, Jackson	3 hr
May 19, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	42 min
May 19, 6:05 PM CDT	Special Weather Statement	OUN	Dewey	25 min
May 19, 6:09 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	51 min
May 19, 6:23 PM CDT	Special Weather Statement	OUN	Kay	37 min
May 19, 6:24 PM CDT	Special Weather Statement	OUN	Garfield	36 min
May 19, 6:24 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	51 min
May 19, 6:26 PM CDT	Special Weather Statement	OUN	Logan	19 min
May 19, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	18 min
May 19, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	50 min
May 19, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	25 min
May 19, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Woods	35 min

Nearby

Tornado Warnings in Oklahoma, 2018 Every tornado warning in 2018 Tornadoes 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.