Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Tulsa, OK

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

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 6, 2017, 9:11 PM CST for Adair County, Cherokee County, Sequoyah County, Oklahoma; Crawford County, Washington County, Arkansas. It was in force for 49 min. 3 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, 9:11 PM CST (03:11 UTC)
Expired: Mar 6, 2017, 10:00 PM CST
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Western Arkansas radar (KSRX), 55 km from the middle of the area, began a volume at 03:10 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, 9:50 PM CST	HAIL 1.75	4 S Stilwell, OK
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, 3.2 hours before the alert went out and 157 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.

046 
WUUS54 KTSA 070311
SVRTSA
ARC033-143-OKC001-021-135-070400-
/O.NEW.KTSA.SV.W.0013.170307T0311Z-170307T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
911 PM CST MON MAR 6 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northwestern Crawford County in northwestern Arkansas...
  Southwestern Washington County in northwestern Arkansas...
  North central Sequoyah County in east central Oklahoma...
  Southern Adair County in northeastern Oklahoma...
  Southeastern Cherokee County in east central Oklahoma...

* Until 1000 PM CST

* At 910 PM CST, a severe thunderstorm was located 5 miles northwest
  of Marble City, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations in or near the path include...
  Stilwell...                       Lincoln...
  Marble City...                    Cookson...
  Adair State Park...               Bunch...
  Maryetta...                       Clyde...
  Canehill...                       Odell...
  Morrow...                         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

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

LAT...LON 3553 9491 3566 9503 3599 9444 3576 9428
TIME...MOT...LOC 0310Z 239DEG 41KT 3563 9490 

HAIL...1.00IN
WIND...60MPH
 
$$

1 follow-up statement

012 
WWUS54 KTSA 070327
SVSTSA

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

ARC033-143-OKC001-021-135-070400-
/O.CON.KTSA.SV.W.0013.000000T0000Z-170307T0400Z/
Crawford AR-Washington AR-Sequoyah OK-Adair OK-Cherokee OK-
927 PM CST MON MAR 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CST
FOR NORTHWESTERN CRAWFORD...SOUTHWESTERN WASHINGTON...NORTH CENTRAL
SEQUOYAH...SOUTHERN ADAIR AND SOUTHEASTERN CHEROKEE COUNTIES...

At 927 PM CST, a severe thunderstorm was located over Bunch, moving
northeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations in or near the path include...
Stilwell...                       Lincoln...
Adair State Park...               Bunch...
Maryetta...                       Clyde...
Canehill...                       Odell...
Morrow...                         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

&&

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

LAT...LON 3559 9477 3567 9492 3599 9444 3576 9428
      3561 9469
TIME...MOT...LOC 0327Z 241DEG 23KT 3568 9478 

HAIL...1.00IN
WIND...60MPH
 
$$

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, 9:19 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, 9:40 PM CST	Tornado Warning	TSA	Adair, Sequoyah	35 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

Severe Thunderstorm Warnings in Oklahoma, 2017 Severe Thunderstorm Warnings in Arkansas, 2017 Every severe thunderstorm warning 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.