Alert archive / Oklahoma / Tornado Warnings in 2017

Tornado Warning 12, NWS Tulsa, OK

April 28, 2017Sebastian County, Arkansas; LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2017, 10:25 PM CDT for Sebastian County, Arkansas; LeFlore County, Sequoyah County, Oklahoma. It was in force for 35 min. 9 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: Apr 28, 2017, 10:25 PM CDT (03:25 UTC)
Expired: Apr 28, 2017, 11:00 PM CDT
In force: 35 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Sebastian County, AR, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 23 km from the middle of the area, began a volume at 03:29 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
Apr 28, 10:41 PM CDT	TORNADO	4 Nw Cameron, OK	DOPPLER RADAR INDICATED TORNADIC DEBRIS SIGNATURE FOR SEVERAL MINUTES. EMERGENCY MANAGEMENT CONDUCTED PRELIMINARY SURVEY. NWS SURVEY WILL BE CONDUCTED TODAY.
Apr 28, 10:41 PM CDT	TORNADO	4 Nw Cameron, OK	A TORNADO DESTROYED MOBILE HOMES...DAMAGED HOMES...DESTROYED OUTBUILDINGS...SNAPPED NUMEROUS TREES AND POWER POLES...UPROOTED NUMEROUS TRESS...AND ROLLED SEVERAL VEHICLES. BASED ON THIS DAMAGE...ESTIMATED MAXIMUM WIND WAS 110 TO 120 MPH. RATING WILL BE EF-2.
Apr 28, 10:45 PM CDT	HAIL 2.75	Pocola, OK
Apr 28, 10:49 PM CDT	HAIL 1.75	Poteau, OK
Apr 28, 10:50 PM CDT	HAIL 1	Panama, OK	NEAR HIGHWAY 271
Apr 28, 10:50 PM CDT	HAIL 1.75	Arkoma, OK
Apr 28, 10:50 PM CDT	HAIL 2	4 Nnw Rye Hill, AR
Apr 28, 10:55 PM CDT	TSTM WND DMG	1 W Cameron, OK	TREES AND POWER LINES DOWN WEST OF CAMERON.
Apr 28, 11:05 PM CDT	HAIL 0.75	Arkoma, 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
Apr 28, 10:01 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.4 hours before the alert went out and 207 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: 65 J/kg
Mixed-layer CIN: -331 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

447 
WFUS54 KTSA 290325
TORTSA
ARC131-OKC079-135-290400-
/O.NEW.KTSA.TO.W.0012.170429T0325Z-170429T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
1025 PM CDT FRI APR 28 2017

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northwestern Sebastian County in west central Arkansas...
  Southeastern Sequoyah County in east central Oklahoma...
  Northeastern Le Flore County in southeastern Oklahoma...

* Until 1100 PM CDT
    
* At 1024 PM CDT, a severe thunderstorm with strong low level
  rotation that could produce a tornado at any time was located over
  Poteau, moving northeast at 40 mph.

  HAZARD...Tornado and golf 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 in or near the path include...
  Fort Smith...                     Poteau...
  Greenwood...                      Barling...
  Pocola...                         Spiro...
  Arkoma...                         Panama...
  Hackett...                        Bonanza...
  Cameron...                        Moffett...
  Excelsior...                      Jenny Lind...
  Shady Point...                    Rock Island...
  Scullyville...                    Braden...
  Mill Creek...                     Rye Hill...

This includes Interstate 540 between mile markers 9 and 14.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement 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 3495 9459 3506 9477 3542 9449 3527 9421
TIME...MOT...LOC 0324Z 217DEG 33KT 3505 9464 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

2 follow-up statements

105 
WWUS54 KTSA 290336
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1036 PM CDT FRI APR 28 2017

ARC131-OKC079-135-290400-
/O.CON.KTSA.TO.W.0012.000000T0000Z-170429T0400Z/
Sebastian AR-Sequoyah OK-Le Flore OK-
1036 PM CDT FRI APR 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
NORTHWESTERN SEBASTIAN...SOUTHEASTERN SEQUOYAH AND NORTHEASTERN LE
FLORE COUNTIES...
    
At 1035 PM CDT, a severe thunderstorm with strong low level rotation
that could produce a tornado at any time was located over Cameron,
moving northeast at 35 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 in or near the path include...
Fort Smith...                     Poteau...
Greenwood...                      Barling...
Pocola...                         Spiro...
Arkoma...                         Panama...
Hackett...                        Bonanza...
Cameron...                        Moffett...
Excelsior...                      Jenny Lind...
Shady Point...                    Rock Island...
Scullyville...                    Braden...
Mill Creek...                     Rye Hill...

This includes Interstate 540 between mile markers 9 and 14.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement 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 3502 9458 3511 9472 3542 9449 3527 9421
TIME...MOT...LOC 0335Z 218DEG 32KT 3513 9456 

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

$$

69

829 
WWUS54 KTSA 290346
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1046 PM CDT FRI APR 28 2017

ARC131-OKC079-135-290400-
/O.CON.KTSA.TO.W.0012.000000T0000Z-170429T0400Z/
Sebastian AR-Sequoyah OK-Le Flore OK-
1046 PM CDT FRI APR 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR
NORTHWESTERN SEBASTIAN...SOUTHEASTERN SEQUOYAH AND NORTHEASTERN LE
FLORE COUNTIES...
        
At 1045 PM CDT, a confirmed large and extremely dangerous tornado was
located 3 miles north of Cameron, moving north at 30 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado. 

SOURCE...Radar confirmed tornado. 

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible. 

Locations in or near the path include...
Fort Smith...                     Poteau...
Greenwood...                      Barling...
Pocola...                         Spiro...
Arkoma...                         Panama...
Hackett...                        Bonanza...
Cameron...                        Moffett...
Excelsior...                      Jenny Lind...
Shady Point...                    Rock Island...
Scullyville...                    Braden...
Mill Creek...                     Rye Hill...

This includes Interstate 540 between mile markers 9 and 14.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3502 9458 3511 9472 3542 9449 3527 9421
TIME...MOT...LOC 0345Z 193DEG 25KT 3518 9455 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...2.50IN

$$

69

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 9:37 PM CDT	Special Weather Statement	TSA	Madison	23 min
Apr 28, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	47 min
Apr 28, 10:17 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	43 min
Apr 28, 10:27 PM CDT	Severe Thunderstorm Warning	TSA	Washington	33 min
Apr 28, 10:35 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Madison, Washington	25 min
Apr 28, 10:42 PM CDT	Special Weather Statement	TSA	Crawford	33 min
Apr 28, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	27 min
Apr 28, 10:53 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	23 min
Apr 28, 10:58 PM CDT	Tornado Warning	TSA	Crawford, Sebastian	31 min
Apr 28, 10:59 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	31 min
Apr 28, 11:10 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	23 min
Apr 28, 11:11 PM CDT	Special Weather Statement	TSA	Carroll	34 min
Apr 28, 11:20 PM CDT	Special Weather Statement	TSA	Washington	25 min
Apr 28, 11:33 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 28, 11:33 PM CDT	Special Weather Statement	TSA	Benton	27 min
Apr 28, 11:34 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	26 min
Apr 28, 11:48 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	27 min
Apr 29, 12:06 AM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	39 min
Apr 29, 12:16 AM CDT	Special Weather Statement	TSA	Benton	29 min
Apr 29, 12:22 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	38 min
Apr 29, 12:41 AM CDT	Special Weather Statement	TSA	Carroll	34 min
Apr 29, 1:02 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Washington	43 min
Apr 29, 1:26 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	34 min
Apr 29, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	15 min
Apr 29, 1:49 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Washington	41 min
Apr 29, 2:01 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	29 min
Apr 29, 2:22 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	38 min
Apr 29, 2:27 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	33 min
Apr 29, 2:57 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Washington	33 min
Apr 29, 5:21 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 29, 6:10 AM CDT	Severe Thunderstorm Warning	TSA	Carroll	35 min
Apr 29, 8:38 AM CDT	Flash Flood Warning	TSA	Benton, Washington	10 hr
Apr 29, 12:36 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Madison, Sebastian, Washington	6 hr
Apr 29, 1:01 PM CDT	Special Weather Statement	TSA	Washington	29 min
Apr 29, 1:07 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 29, 1:20 PM CDT	Special Weather Statement	TSA	Sebastian	25 min
Apr 29, 1:47 PM CDT	Flash Flood Warning	TSA	Carroll, Franklin, Madison	6 hr
Apr 29, 1:57 PM CDT	Special Weather Statement	TSA	Franklin	33 min
Apr 29, 3:19 PM CDT	Special Weather Statement	TSA	Madison	26 min
Apr 29, 4:43 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	32 min
Apr 29, 4:58 PM CDT	Tornado Warning	TSA	Crawford, Washington	14 min
Apr 29, 5:16 PM CDT	Special Weather Statement	TSA	Washington	44 min
Apr 29, 5:26 PM CDT	Severe Thunderstorm Warning	TSA	Washington	34 min
Apr 29, 5:48 PM CDT	Special Weather Statement	TSA	Benton	27 min
Apr 29, 5:52 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	23 min
Apr 29, 6:19 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	10 hr
Apr 29, 6:23 PM CDT	Special Weather Statement	TSA	Benton	52 min
Apr 28, 9:54 PM CDT	Special Weather Statement	TSA	LeFlore	36 min
Apr 28, 10:00 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	45 min
Apr 28, 10:45 PM CDT	Special Weather Statement	TSA	McIntosh	30 min
Apr 28, 11:01 PM CDT	Special Weather Statement	TSA	Tulsa	29 min
Apr 28, 11:07 PM CDT	Special Weather Statement	TSA	Osage	23 min
Apr 28, 11:10 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Pittsburg	65 min
Apr 28, 11:15 PM CDT	Severe Thunderstorm Warning	TSA	Osage	30 min
Apr 28, 11:18 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	27 min
Apr 28, 11:25 PM CDT	Special Weather Statement	TSA	Creek	35 min
Apr 28, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	35 min
Apr 28, 11:53 PM CDT	Special Weather Statement	TSA	Washington	37 min
Apr 29, 12:03 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Delaware, McIntosh, Mayes, Muskogee and 3 more	4 hr
Apr 29, 12:11 AM CDT	Special Weather Statement	TSA	Delaware	34 min
Apr 29, 12:13 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	32 min
Apr 29, 12:18 AM CDT	Special Weather Statement	TSA	Mayes	27 min
Apr 29, 12:26 AM CDT	Special Weather Statement	TSA	Muskogee, Wagoner	34 min
Apr 29, 12:27 AM CDT	Special Weather Statement	TSA	Nowata	18 min
Apr 29, 12:43 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	32 min
Apr 29, 12:46 AM CDT	Special Weather Statement	TSA	Mayes	29 min
Apr 29, 12:49 AM CDT	Special Weather Statement	TSA	Osage	26 min
Apr 29, 12:54 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Muskogee, Wagoner	4 hr
Apr 29, 12:54 AM CDT	Special Weather Statement	TSA	Muskogee	36 min
Apr 29, 1:00 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	30 min
Apr 29, 1:15 AM CDT	Special Weather Statement	TSA	Adair	30 min
Apr 29, 1:28 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	47 min
Apr 29, 1:36 AM CDT	Special Weather Statement	TSA	Washington	24 min
Apr 29, 1:54 AM CDT	Special Weather Statement	TSA	Cherokee	36 min
Apr 29, 2:04 AM CDT	Special Weather Statement	TSA	Nowata	26 min
Apr 29, 2:07 AM CDT	Special Weather Statement	TSA	Pawnee	38 min
Apr 29, 2:21 AM CDT	Areal Flood Advisory	TSA	Craig, Delaware, Mayes, Ottawa	3 hr
Apr 29, 2:41 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	34 min
Apr 29, 2:46 AM CDT	Special Weather Statement	TSA	Delaware, Ottawa	44 min
Apr 29, 3:03 AM CDT	Special Weather Statement	TSA	Pawnee	57 min

Nearby

Tornado Warnings in Oklahoma, 2017 Tornado Warnings in Arkansas, 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.