Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 331, NWS Tulsa, OK

May 28, 2017Sebastian County, Arkansas; LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 28, 2017, 12:58 AM CDT for Sebastian County, Arkansas; LeFlore County, Oklahoma. It was in force for 32 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: May 28, 2017, 12:58 AM CDT (05:58 UTC)
Expired: May 28, 2017, 1:30 AM CDT
In force: 32 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 80.0 mph

Counties Sebastian County, AR, LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 41 km from the middle of the area, began a volume at 06:00 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 28, 1:10 AM CDT	TSTM WND GST 60	3 Se Heavener, OK	IN HONTUNBY. TIME ESTIMATED BY RADAR.
May 28, 1:10 AM CDT	TSTM WND GST 60	3 Se Heavener, OK
May 28, 1:20 AM CDT	TSTM WND DMG	10 Se Heavener, OK	DAMAGE TO BARN, TIN BLOWN OFF ROOF IN HAW CREEK.

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 27, 4:01 PM CDT	Tornado Watch	SPC	10 hr
May 28, 12:06 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.0 hours before the alert went out and 275 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: 5174 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1475 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

As transmitted.

991 
WUUS54 KTSA 280558
SVRTSA
ARC131-OKC079-280630-
/O.NEW.KTSA.SV.W.0331.170528T0558Z-170528T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1258 AM CDT SUN MAY 28 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sebastian County in west central Arkansas...
  Southeastern Le Flore County in southeastern Oklahoma...

* Until 130 AM CDT

* At 1256 AM CDT, a severe thunderstorm was located 9 miles southwest
  of Heavener, moving northeast at 50 mph.

  This is a very dangerous storm. 

  HAZARD...80 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be heavily damaged. Expect 
           considerable damage to roofs, windows, and vehicles. 
           Extensive tree damage and power outages are likely. 

* Locations in or near the path include...
  Heavener...                       Hartford...
  Huntington...                     Heavener Runestone State Park...
  Patterson...                      Hodgen...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is an EXTREMELY DANGEROUS SITUATION. This storm has produced 
multiple higher end wind damage reports across southeast Oklahoma. 
SEEK SHELTER NOW inside a sturdy structure and stay away from 
windows!

&&


LAT...LON 3496 9426 3496 9433 3495 9435 3496 9437
      3494 9439 3495 9441 3493 9443 3493 9445
      3476 9445 3468 9475 3484 9484 3509 9428
      3499 9423 3497 9423
TIME...MOT...LOC 0556Z 247DEG 42KT 3480 9471 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...80MPH
 
$$

Lacy

2 follow-up statements

879 
WWUS54 KTSA 280610
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
110 AM CDT SUN MAY 28 2017

ARC131-OKC079-280630-
/O.CON.KTSA.SV.W.0331.000000T0000Z-170528T0630Z/
Sebastian AR-Le Flore OK-
110 AM CDT SUN MAY 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM CDT
FOR SOUTHWESTERN SEBASTIAN AND EAST CENTRAL LE FLORE COUNTIES...

At 109 AM CDT, a severe thunderstorm was located 6 miles west of
Morgan Springs, moving northeast at 55 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations in or near the path include...
Heavener...                       Hartford...
Huntington...                     Heavener Runestone State Park...
Patterson...                      Hodgen...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm has had a history of producing higher end wind damage 
reports across southeast Oklahoma. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.

&&

A tornado watch remains in effect until 200 AM CDT for west central
Arkansas...and southeastern Oklahoma.

LAT...LON 3496 9426 3496 9433 3495 9435 3496 9437
      3494 9439 3495 9441 3493 9443 3493 9445
      3476 9445 3473 9457 3487 9467 3509 9428
      3499 9423 3497 9423
TIME...MOT...LOC 0609Z 241DEG 48KT 3488 9445 

HAIL...<.75IN
WIND...70MPH
 
$$

Lacy

190 
WWUS54 KTSA 280621
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
121 AM CDT SUN MAY 28 2017

ARC131-OKC079-280631-
/O.EXP.KTSA.SV.W.0331.000000T0000Z-170528T0630Z/
Sebastian AR-Le Flore OK-
121 AM CDT SUN MAY 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SEBASTIAN AND
EAST CENTRAL LE FLORE COUNTIES WILL EXPIRE AT 130 AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 700 AM CDT for 
west central Arkansas...and southeastern Oklahoma.

LAT...LON 3496 9426 3496 9433 3495 9435 3496 9437
      3494 9439 3495 9441 3493 9443 3493 9445
      3476 9445 3473 9457 3487 9467 3509 9428
      3499 9423 3497 9423
TIME...MOT...LOC 0621Z 247DEG 42KT 3493 9430 

$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	Benton	43 min
May 27, 9:24 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	66 min
May 27, 9:32 PM CDT	Areal Flood Advisory	TSA	Benton, Carroll	5 hr
May 27, 9:36 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	54 min
May 27, 10:14 PM CDT	Special Weather Statement	TSA	Madison, Washington	46 min
May 27, 10:45 PM CDT	Areal Flood Advisory	TSA	Madison, Washington	3 hr
May 27, 11:15 PM CDT	Special Weather Statement	TSA	Crawford, Madison, Washington	45 min
May 27, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	35 min
May 27, 11:56 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	34 min
May 28, 12:12 AM CDT	Special Weather Statement	TSA	Franklin	33 min
May 28, 12:19 AM CDT	Severe Thunderstorm Warning	TSA	Franklin, Madison	26 min
May 28, 4:08 AM CDT	Special Weather Statement	TSA	Carroll	37 min
May 27, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	20 min
May 27, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	63 min
May 27, 7:43 PM CDT	Special Weather Statement	TSA	Creek	47 min
May 27, 7:50 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	55 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	50 min
May 27, 8:26 PM CDT	Tornado Warning Tornado observed	TSA	Creek, Okfuskee	49 min
May 27, 8:33 PM CDT	Severe Thunderstorm Warning	TSA	Creek	30 min
May 27, 8:39 PM CDT	Special Weather Statement	TSA	Mayes	51 min
May 27, 8:48 PM CDT	Special Weather Statement	TSA	Tulsa	42 min
May 27, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	53 min
May 27, 8:55 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	35 min
May 27, 8:58 PM CDT	Tornado Warning	TSA	Okfuskee	47 min
May 27, 9:09 PM CDT	Areal Flood Advisory	TSA	Creek, Okfuskee, Okmulgee	3 hr
May 27, 9:11 PM CDT	Tornado Warning	TSA	Okfuskee	34 min
May 27, 9:14 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	46 min
May 27, 9:16 PM CDT	Special Weather Statement	TSA	Rogers	29 min
May 27, 9:21 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	39 min
May 27, 9:26 PM CDT	Special Weather Statement	TSA	Tulsa	34 min
May 27, 9:39 PM CDT	Flash Flood Warning	TSA	Creek, Okfuskee	4 hr
May 27, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Wagoner	63 min
May 27, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	47 min
May 27, 9:46 PM CDT	Areal Flood Advisory	TSA	Delaware, Mayes	3 hr
May 27, 9:46 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okfuskee, Okmulgee, Wagoner	44 min
May 27, 10:17 PM CDT	Special Weather Statement	TSA	Delaware	43 min
May 27, 10:23 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	37 min
May 27, 10:25 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg, Pushmataha	35 min
May 27, 10:32 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	43 min
May 27, 10:44 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers	61 min
May 27, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Sequoyah	42 min
May 27, 11:09 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	51 min
May 27, 11:10 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg, Pushmataha	65 min
May 27, 11:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	41 min
May 27, 11:53 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	37 min
May 28, 12:05 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	40 min
May 28, 12:37 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	38 min
May 28, 1:15 AM CDT	Special Weather Statement	TSA	Osage	30 min
May 28, 1:27 AM CDT	Special Weather Statement	TSA	Creek	33 min
May 28, 1:34 AM CDT	Severe Thunderstorm Warning	TSA	Creek	41 min
May 28, 1:44 AM CDT	Special Weather Statement	TSA	Okfuskee	31 min
May 28, 2:01 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	26 min
May 28, 2:23 AM CDT	Special Weather Statement	TSA	Choctaw	37 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2017 Severe Thunderstorm Warnings in Oklahoma, 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.