Alert archive / Oklahoma / Tornado Warnings in 2017

Tornado Warning 2, NWS Tulsa, OK

March 6, 2017Adair County, Sequoyah County, Oklahoma; Crawford County, Washington County, Arkansas

NWS Tulsa, OK issued this tornado warning at Mar 6, 2017, 9:40 PM CST for Adair County, Sequoyah County, Oklahoma; Crawford County, Washington County, Arkansas. It was in force for 35 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: Mar 6, 2017, 9:40 PM CST (03:40 UTC)
Expired: Mar 6, 2017, 10:15 PM CST
In force: 35 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Crawford County, AR, Washington County, AR, Adair County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 45 km from the middle of the area, began a volume at 03:43 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
Mar 6, 9:45 PM CST	TORNADO	3 Ese Bunch, OK	EF1. MAX WINDS 90-100 MPH. HOMES AND OUTBUILDINGS DAMAGED. TREES UPROOTED AND SOME SNAPPED.
Mar 6, 9:53 PM CST	HAIL 1	3 Ese Bunch, OK	HAIL REPORTED JUST NORTH OF GREASY

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
Mar 6, 6:51 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.7 hours before the alert went out and 150 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: 629 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1110 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 319 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

As transmitted.

640 
WFUS54 KTSA 070340
TORTSA
ARC033-143-OKC001-135-070415-
/O.NEW.KTSA.TO.W.0002.170307T0340Z-170307T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
940 PM CST MON MAR 6 2017

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northwestern Crawford County in northwestern Arkansas...
  Southwestern Washington County in northwestern Arkansas...
  Northeastern Sequoyah County in east central Oklahoma...
  Southern Adair County in northeastern Oklahoma...

* Until 1015 PM CST
    
* At 940 PM CST, a severe thunderstorm capable of producing a tornado
  was located 3 miles southeast of Bunch, moving east at 30 mph.

  HAZARD...Tornado. 

  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...
  Natural Dam...                    Bunch...
  Lee Creek...                      Odell...

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 3562 9429 3559 9477 3570 9480 3584 9440
TIME...MOT...LOC 0340Z 251DEG 28KT 3565 9473 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

3 follow-up statements

495 
WWUS54 KTSA 070350
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
950 PM CST MON MAR 6 2017

OKC135-070359-
/O.CAN.KTSA.TO.W.0002.000000T0000Z-170307T0415Z/
Sequoyah OK-
950 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR NORTHEASTERN SEQUOYAH COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore the warning has been cancelled.

A tornado watch remains in effect until 300 AM CST for northwestern
Arkansas...and northeastern Oklahoma.

LAT...LON 3564 9430 3564 9470 3573 9473 3584 9440
TIME...MOT...LOC 0349Z 223DEG 28KT 3569 9467 

$$

ARC033-143-OKC001-070415-
/O.CON.KTSA.TO.W.0002.000000T0000Z-170307T0415Z/
Crawford AR-Washington AR-Adair OK-
950 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
NORTHWESTERN CRAWFORD...SOUTHWESTERN WASHINGTON AND SOUTHEASTERN
ADAIR COUNTIES...
    
At 949 PM CST, a severe thunderstorm capable of producing a tornado
was located 5 miles east of Bunch, moving northeast at 30 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 in or near the path include...
Natural Dam...                    Lee Creek...
Odell...                          

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 3564 9430 3564 9470 3573 9473 3584 9440
TIME...MOT...LOC 0349Z 223DEG 28KT 3569 9467 

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

$$

484 
WWUS54 KTSA 070403
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1003 PM CST MON MAR 6 2017

ARC033-143-070410-
/O.CAN.KTSA.TO.W.0002.000000T0000Z-170307T0415Z/
Crawford AR-Washington AR-
1003 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR NORTHWESTERN CRAWFORD AND SOUTHWESTERN
WASHINGTON COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore the warning has been cancelled.

A tornado watch remains in effect until 300 AM CST for northeastern
Oklahoma.

LAT...LON 3573 9449 3573 9461 3576 9464 3580 9451
TIME...MOT...LOC 0400Z 219DEG 31KT 3575 9460 

$$

OKC001-070415-
/O.CON.KTSA.TO.W.0002.000000T0000Z-170307T0415Z/
Adair OK-
1003 PM CST MON MAR 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
SOUTHEASTERN ADAIR COUNTY...
    
At 1000 PM CST, a severe thunderstorm with a weakening rotation was 
located 4 miles south of Stilwell, moving northeast at 35 mph.

The rotation was weakening rapidly and the warning will not be 
extened. 

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. 

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Adair County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...


&&

LAT...LON 3573 9449 3573 9461 3576 9464 3580 9451
TIME...MOT...LOC 0400Z 219DEG 31KT 3575 9460 

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

$$

010 
WWUS54 KTSA 070406
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1006 PM CST MON MAR 6 2017

OKC001-070416-
/O.EXP.KTSA.TO.W.0002.000000T0000Z-170307T0415Z/
Adair OK-
1006 PM CST MON MAR 6 2017

...THE TORNADO WARNING FOR SOUTHEASTERN ADAIR COUNTY WILL EXPIRE AT
1015 PM CST...
    
The tornadic thunderstorm which prompted the warning has weakened 
and was moving out of the warned area. Therefore the warning will be 
allowed to expire.

A tornado watch remains in effect until 300 AM CST for northeastern
Oklahoma.

LAT...LON 3573 9449 3573 9461 3576 9464 3580 9451
TIME...MOT...LOC 0406Z 251DEG 28KT 3576 9455 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 6, 7:41 PM CST	Special Weather Statement	TSA	Ottawa	19 min
Mar 6, 8:12 PM CST	Severe Thunderstorm Warning	TSA	Osage	48 min
Mar 6, 8:31 PM CST	Severe Thunderstorm Warning	TSA	Osage, Pawnee	44 min
Mar 6, 8:51 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	39 min
Mar 6, 8:55 PM CST	Severe Thunderstorm Warning	TSA	Adair	35 min
Mar 6, 9:03 PM CST	Special Weather Statement	TSA	Adair	27 min
Mar 6, 9:11 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	49 min
Mar 6, 9:19 PM CST	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa, Washington	41 min
Mar 6, 9:24 PM CST	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Osage, Ottawa, Rogers and 1 more	66 min
Mar 6, 9:46 PM CST	Severe Thunderstorm Warning	TSA	Creek, Mayes, Okfuskee, Okmulgee, Osage, Pawnee and 4 more	59 min
Mar 6, 10:04 PM CST	Severe Thunderstorm Warning	TSA	Adair	26 min
Mar 6, 10:08 PM CST	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa, Rogers	67 min
Mar 6, 10:21 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Creek, Delaware, McIntosh, Mayes, Muskogee and 5 more	54 min
Mar 6, 10:32 PM CST	Special Weather Statement	TSA	LeFlore	28 min
Mar 6, 10:53 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Wagoner	67 min
Mar 6, 11:08 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 4 more	67 min
Mar 6, 11:24 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	66 min
Mar 6, 11:44 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, Latimer, McIntosh, Muskogee and 2 more	61 min
Mar 7, 12:28 AM CST	Severe Thunderstorm Warning	TSA	Adair, Haskell, Latimer, LeFlore, Sequoyah	47 min
Mar 7, 12:51 AM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	39 min
Mar 7, 1:11 AM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Sequoyah	49 min
Mar 7, 1:28 AM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	47 min
Mar 7, 2:32 AM CST	Special Weather Statement	TSA	Choctaw	43 min
Mar 7, 3:53 AM CST	Red Flag Warning	TSA	Craig, Creek, Delaware, Mayes, Nowata, Ottawa and 4 more	15 hr
Mar 7, 3:44 PM CST	Fire Weather Watch	TSA	Craig, Creek, Nowata, Ottawa, Pawnee, Rogers and 2 more	13 hr
Mar 6, 9:09 PM CST	Tornado Warning	TSA	Washington	36 min
Mar 6, 9:16 PM CST	Special Weather Statement	TSA	Washington	44 min
Mar 6, 10:21 PM CST	Tornado Warning	TSA	Crawford, Washington	24 min
Mar 6, 10:45 PM CST	Tornado Warning	TSA	Madison, Washington	30 min
Mar 6, 11:14 PM CST	Tornado Warning	TSA	Madison	31 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.