Alert archive / Oklahoma / Tornado Warnings in 2015

Tornado Warning 101, NWS Norman, OK

May 19, 2015Jefferson County, Oklahoma

NWS Norman, OK issued this tornado warning at May 19, 2015, 6:40 PM CDT for Jefferson County, Oklahoma. It was in force for 50 min. 2 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, 2015, 6:40 PM CDT (23:40 UTC)
Expired: May 19, 2015, 7:30 PM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Observed
Hail: 1.75 in

County Jefferson County, OK

The radar

The Altus AFB radar (KFDR), 123 km from the middle of the area, began a volume at 23:43 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, 6:46 PM CDT	TORNADO	3 Wnw Oscar, OK
May 19, 6:50 PM CDT	TORNADO	4 Nw Oscar, 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, 1:32 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.7 hours before the alert went out and 132 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: 1766 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

753 
WFUS54 KOUN 192340
TOROUN
OKC067-200030-
/O.NEW.KOUN.TO.W.0101.150519T2340Z-150520T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
640 PM CDT TUE MAY 19 2015

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN JEFFERSON COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 730 PM CDT

* AT 639 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR OSCAR...MOVING
  NORTHEAST AT 20 MPH.

  HAZARD...DAMAGING TORNADO AND GOLF BALL SIZE HAIL. 

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO. 

  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...
  RINGLING...OSCAR...GRADY...CORNISH AND PETERSBURG. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3408 9796 3421 9756 3395 9756 3394 9759
      3395 9759 3398 9763 3399 9768 3395 9771
      3394 9774 3394 9776 3391 9776 3392 9778
      3389 9778 3390 9780 3388 9780 3387 9782
TIME...MOT...LOC 2339Z 236DEG 16KT 3401 9781 

TORNADO...OBSERVED
HAIL...1.75IN

$$

AUSTIN/MAD

1 follow-up statement

141 
WWUS54 KOUN 200018
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
718 PM CDT TUE MAY 19 2015

OKC067-200030-
/O.CON.KOUN.TO.W.0101.000000T0000Z-150520T0030Z/
JEFFERSON OK-
718 PM CDT TUE MAY 19 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN JEFFERSON COUNTY...
    
AT 718 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 6 MILES NORTH OF GRADY...MOVING NORTHEAST AT 20 MPH.

HAZARD...TORNADO AND QUARTER 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...
RINGLING...OSCAR...GRADY...CORNISH AND PETERSBURG. 

LAT...LON 3408 9796 3421 9756 3395 9756 3394 9759
      3395 9759 3398 9763 3399 9768 3395 9771
      3394 9774 3394 9776 3391 9776 3392 9778
      3389 9778 3390 9780 3388 9780 3387 9782
TIME...MOT...LOC 0018Z 224DEG 17KT 3411 9771 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

MAD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 8:29 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	3 days
May 19, 8:41 AM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	12 days
May 19, 8:41 AM CDT	River Flood Warning	OUN	Jefferson, Love	12 days
May 19, 8:43 AM CDT	River Flood Warning	OUN	Comanche, Cotton	12 days
May 19, 8:43 AM CDT	River Flood Warning	OUN	Cotton	9 days
May 19, 10:44 AM CDT	Areal Flood Advisory	OUN	Comanche, Jackson, Kiowa, Tillman, Washita	3 hr
May 19, 11:28 AM CDT	Special Weather Statement	OUN	Caddo	47 min
May 19, 12:19 PM CDT	Special Weather Statement	OUN	Caddo, Grady	41 min
May 19, 1:00 PM CDT	Special Weather Statement	OUN	Canadian, Grady	45 min
May 19, 1:15 PM CDT	Areal Flood Advisory	OUN	Caddo, Canadian, Cleveland, Grady, McClain, Oklahoma	3 hr
May 19, 1:26 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	49 min
May 19, 1:35 PM CDT	Special Weather Statement	OUN	Beckham, Greer	55 min
May 19, 1:41 PM CDT	Special Weather Statement	OUN	McClain	34 min
May 19, 1:47 PM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	14 hr
May 19, 1:54 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	66 min
May 19, 2:07 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain	38 min
May 19, 2:08 PM CDT	River Flood Warning	OUN	Carter, Johnston, Murray	41 hr
May 19, 2:09 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain, Oklahoma	32 min
May 19, 2:13 PM CDT	River Flood Warning	OUN	Jackson, Kiowa, Tillman	8 days
May 19, 2:25 PM CDT	Special Weather Statement	OUN	Murray	50 min
May 19, 2:42 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	48 min
May 19, 2:45 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Kiowa, Washita	3 hr
May 19, 2:47 PM CDT	River Flood Warning	OUN	Bryan	3 days
May 19, 2:50 PM CDT	Special Weather Statement	OUN	Greer, Washita	40 min
May 19, 2:52 PM CDT	Tornado Warning Tornado observed	OUN	Cleveland, McClain, Pottawatomie	38 min
May 19, 3:00 PM CDT	Special Weather Statement	OUN	Tillman	45 min
May 19, 3:07 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	38 min
May 19, 3:22 PM CDT	Special Weather Statement	OUN	Pottawatomie	53 min
May 19, 3:29 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	46 min
May 19, 3:30 PM CDT	Flash Flood Warning	OUN	Caddo, Canadian, Comanche, Custer, Jackson, Kiowa and 2 more	3 hr
May 19, 3:30 PM CDT	Tornado Warning Tornado observed	OUN	Cleveland, McClain	27 min
May 19, 3:33 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Stephens, Tillman	3 hr
May 19, 3:33 PM CDT	Tornado Warning Tornado observed	OUN	Cotton, Tillman	27 min
May 19, 3:47 PM CDT	Special Weather Statement	OUN	Kiowa	43 min
May 19, 3:50 PM CDT	Areal Flood Advisory	OUN	Lincoln, Pottawatomie, Seminole	4 hr
May 19, 3:52 PM CDT	Tornado Warning	OUN	Cleveland, Pottawatomie	38 min
May 19, 3:55 PM CDT	Tornado Warning Tornado observed	OUN	Comanche, Cotton, Tillman	50 min
May 19, 4:21 PM CDT	Special Weather Statement	OUN	Comanche	24 min
May 19, 4:27 PM CDT	Special Weather Statement	OUN	Pottawatomie	33 min
May 19, 4:31 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	44 min
May 19, 4:32 PM CDT	Special Weather Statement	OUN	Caddo	43 min
May 19, 4:36 PM CDT	Tornado Warning	OUN	Comanche, Cotton	39 min
May 19, 4:40 PM CDT	Flash Flood Warning	OUN	Comanche, Cotton, Jefferson, Stephens, Tillman	4 hr
May 19, 4:42 PM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	3 hr
May 19, 4:48 PM CDT	Tornado Warning	OUN	Cotton	27 min
May 19, 5:10 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	50 min
May 19, 5:13 PM CDT	Tornado Warning	OUN	Cotton, Jefferson, Stephens	44 min
May 19, 5:36 PM CDT	Special Weather Statement	OUN	Cleveland	39 min
May 19, 5:42 PM CDT	Areal Flood Advisory	OUN	Jefferson	3 hr
May 19, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	41 min
May 19, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	38 min
May 19, 6:09 PM CDT	Flash Flood Warning	OUN	Carter, Garvin, Jefferson, Love, Murray, Stephens	3 hr
May 19, 6:13 PM CDT	Special Weather Statement	OUN	Cleveland	47 min
May 19, 6:15 PM CDT	Flash Flood Warning	OUN	Cotton, Jefferson	3 hr
May 19, 6:21 PM CDT	Tornado Warning Tornado observed	OUN	Jefferson	24 min
May 19, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	48 min
May 19, 6:56 PM CDT	Special Weather Statement	OUN	Cleveland, Grady, McClain	34 min

Nearby

Tornado Warnings in Oklahoma, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.