Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 330, NWS Tulsa, OK

May 28, 2017Latimer County, LeFlore County, Pushmataha County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 28, 2017, 12:37 AM CDT for Latimer County, LeFlore County, Pushmataha County, Oklahoma. It was in force for 38 min. 5 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, 12:37 AM CDT (05:37 UTC)
Expired: May 28, 2017, 1:15 AM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Latimer County, OK, LeFlore County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 107 km from the middle of the area, began a volume at 05:40 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, 12:41 AM CDT	TSTM WND GST 60	3 Nw Whitesboro, OK
May 28, 12:45 AM CDT	TSTM WND GST 78	Whitesboro, OK	TREES AND POWERLINES DOWN
May 28, 12:50 AM CDT	TSTM WND GST 60	Talihina, OK
May 28, 1:13 AM CDT	HAIL 1.75	Big Cedar, 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.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this severe thunderstorm warning; the first came 4 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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, 5.6 hours before the alert went out and 238 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.

236 
WUUS54 KTSA 280537
SVRTSA
OKC077-079-127-280615-
/O.NEW.KTSA.SV.W.0330.170528T0537Z-170528T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1237 AM CDT SUN MAY 28 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Eastern Pushmataha County in southeastern Oklahoma...
  South central Latimer County in southeastern Oklahoma...
  Southern Le Flore County in southeastern Oklahoma...

* Until 115 AM CDT

* At 1237 AM CDT, severe thunderstorms were located along a line
  extending from 3 miles northwest of Whitesboro to 8 miles west of
  Octavia to 16 miles east of Cloudy, moving east at 45 mph.

  HAZARD...70 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

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

* Locations in or near the path include...
  Talihina...                       Albion...
  Octavia...                        Whitesboro...
  Muse...                           Big Cedar...
  Hodgen...                         Honobia...

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 200 AM CDT for southeastern
Oklahoma.

LAT...LON 3445 9510 3473 9516 3488 9445 3451 9446
      3451 9504 3425 9505 3424 9514 3416 9516
TIME...MOT...LOC 0537Z 269DEG 41KT 3472 9494 3448 9484 3422 9501 

HAIL...0.75IN
WIND...70MPH
 
$$

Lacy

1 follow-up statement

645 
WWUS54 KTSA 280551
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1251 AM CDT SUN MAY 28 2017

OKC077-127-280559-
/O.CAN.KTSA.SV.W.0330.000000T0000Z-170528T0615Z/
Pushmataha OK-Latimer OK-
1251 AM CDT SUN MAY 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PUSHMATAHA AND SOUTH
CENTRAL LATIMER COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 700 AM CDT for 
southeastern Oklahoma.

LAT...LON 3468 9494 3468 9506 3475 9506 3488 9445
      3451 9446 3451 9494
TIME...MOT...LOC 0549Z 247DEG 42KT 3480 9480 3469 9471 3453 9473 

$$

OKC079-280615-
/O.CON.KTSA.SV.W.0330.000000T0000Z-170528T0615Z/
Le Flore OK-
1251 AM CDT SUN MAY 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR SOUTHERN LE FLORE COUNTY...

At 1249 AM CDT, severe thunderstorms were located along a line
extending from 8 miles northeast of Whitesboro to 3 miles northeast
of Muse to near Octavia, moving northeast at 50 mph.

These are very dangerous storms.

HAZARD...80 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. At 1245 am, 78 mph winds were reported 
         along with downed trees and power lines in Whitesboro. 

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...
Talihina...                       Octavia...
Whitesboro...                     Muse...
Big Cedar...                      Hodgen...
Honobia...                        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is an EXTREMELY DANGEROUS SITUATION. These storms are producing 
widespread wind damage 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 southeastern
Oklahoma.

LAT...LON 3468 9494 3468 9506 3475 9506 3488 9445
      3451 9446 3451 9494
TIME...MOT...LOC 0549Z 247DEG 42KT 3480 9480 3469 9471 3453 9473 

HAIL...0.75IN
WIND...80MPH
 
$$

Lacy

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 27, 8:48 PM CDT, 3 hours 49 minutes earlier.

Area forecast discussion, May 27, 8:48 PM CDT, 3 hours 49 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
848 PM CDT Sat May 27 2017

.DISCUSSION...
Severe threat continues across the entire area. Latest
mesoanalysis shows the synoptic front extending from far northeast
OK into western Oklahoma/TX panhandle. Another wind shift
boundary was located across northeast OK noted in mesonet and
radar data from Pryor/Tulsa/Oilton. Supercell in Okfuskee County
has recently been tornado warned and large hail/tornado potential
continues with this cell. The other strong storms are located in
south central OK and have been produced some large hail so far.

Have increased the hourly pops across the southern zones in
advance of the supercells approaching from south central Oklahoma.
Short term model guidance continue to show semi-discrete
supercells persisting for several hours. Until a more linear mode
develops, tornado threat will continue especially south of
Interstate 40.

Updates already sent.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   65  81  58  87 /  60  10   0   0
FSM   71  83  60  87 /  70  10   0   0
MLC   67  80  57  86 /  70  10   0   0
BVO   62  81  53  87 /  40  10   0  10
FYV   64  77  51  82 /  70  10   0   0
BYV   66  78  54  82 /  70  10   0   0
MKO   66  79  57  86 /  70  10   0   0
MIO   64  80  54  84 /  60  10   0  10
F10   66  80  57  86 /  60  10   0   0
HHW   71  81  61  87 /  80  20  10  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 7 AM CDT Sunday for OKZ049-053-067>076.

AR...Flood Watch until 7 AM CDT Sunday for ARZ001-002-010-011-019-020-
     029.

&&

SHORT TERM...06
AVIATION....30

CORFIDI

Hazardous weather outlook, May 27, 4:57 PM CDT, 7 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
457 PM CDT Sat May 27 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-281030-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
457 PM CDT Sat May 27 2017

...TORNADO WATCH IN EFFECT UNTIL MIDNIGHT FOR EASTERN OKLAHOMA
AND WESTERN ARKANSAS...

...SIGNIFICANT SEVERE WEATHER LIKELY TONIGHT WITH DESTRUCTIVE
WINDS AND LARGE HAIL WITH A FEW STRONG TORNADOES POSSIBLE...

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...This afternoon and Tonight.
TORNADO.
	RISK...Elevated.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Late afternoon.

SEVERE THUNDERSTORM.
	RISK...Critical.
	AREA...Eastern Oklahoma and western Arkansas.
    ONSET...Late afternoon.

	AREA AT GREATEST RISK...Along and north of Interstate 44 through early evening,
    then along and south of Interstate 44 tonight.

FLASH FLOOD.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Early evening.

HEAVY RAIN.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Early evening.

DANGEROUS HEAT.
	RISK...Limited.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Latest surface mesoanalysis shows boundary across far northeast
Oklahoma. OK mesonet observations and radar data suggest
convective towers are developing along a line from just north of
Vinita southwest toward central Osage County - near Pawhuska. We
are monitoring this area for first development this afternoon.

Elevated showers and storms are approaching from central Oklahoma
with a few lightning strikes noted. The cap has held strong to
this point but once the cap is breached, explosive storm
development is likely given extreme instability in place. All
modes of severe will be likely, including very large hail,
damaging wind gusts and tornadoes.

Eventually, storms will increase in coverage and likely
transition toward a damaging wind threat by mid to late evening as
they develop southeastward. Additionally, an axis of heavy
rainfall is likely from northwest Arkansas through eastern
Oklahoma. Recent heavy rainfall may allow for rapid onset flash
flooding in a few locations.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Regional Spotter Network has been activated.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
SUNDAY...Thunderstorm Potential.
MONDAY and TUESDAY...No Hazards.
WEDNESDAY through FRIDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Storms will begin to shift southeast of the region Sunday morning
with dry conditions on Monday and Tuesday. Low thunderstorm
chances return mid to late week, with limited additional severe
weather potential.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
A Tornado Watch is in effect through midnight for all of eastern
Oklahoma and western Arkansas. Initiation of storms is expected
within the next hour or so. The holiday weekend will provide
numerous outdoor exposures which will further increase the
potential for a rapid safety response. Outdoor activities may need
to be cancelled this evening, especially if you are unable to
quickly move indoors to a substantial shelter.

weather.gov/tulsa Contains additional information.

CORFIDI

In the hours before

Local storm report, May 27, 11:39 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1139 PM CDT SAT MAY 27 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1133 PM     HAIL             BLUEJACKET              36.80N 95.07W
05/27/2017  E2.50 INCH       CRAIG              OK   EMERGENCY MNGR

&&

JDS

Local storm report, May 27, 11:56 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1156 PM CDT SAT MAY 27 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1149 PM     HAIL             MIAMI                   36.87N 94.88W
05/27/2017  E1.00 INCH       OTTAWA             OK   TRAINED SPOTTER

&&

AEJ

Local storm report, May 27, 11:58 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1158 PM CDT SAT MAY 27 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1155 PM     HAIL             MIAMI                   36.87N 94.88W
05/27/2017  E1.50 INCH       OTTAWA             OK   TRAINED SPOTTER

&&

JDS

Special weather statement, May 28, 12:12 AM CDT, 25 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1212 AM CDT SUN MAY 28 2017

ARZ019-020-029-280545-
Sebastian AR-Franklin AR-Crawford AR-
1212 AM CDT SUN MAY 28 2017

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN...NORTHERN SEBASTIAN AND
SOUTHEASTERN CRAWFORD COUNTIES UNTIL 1245 AM CDT...

At 1212 AM CDT, strong thunderstorms were located along a line
extending from 4 miles southeast of Fern to 5 miles south of Mulberry
to 2 miles south of Barling. Movement was east at 50 mph.

Dime size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations in or near the path include...
Fort Smith...                     Ozark...
Charleston...                     Barling...
Lavaca...                         Mulberry...
Altus...                          Branch...
Denning...                        Wiederkehr Village...
Bloomer...                        Jenny Lind...
Central City...                   Caulksville...
Jethro...                         Rye Hill...
Vesta...                          Lonelm...
Cecil...                          Ursula...

This includes Interstate 40 in Arkansas between mile markers 22 and
42.

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

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

LAT...LON 3538 9371 3537 9375 3542 9380 3531 9381
      3532 9392 3524 9392 3525 9444 3527 9444
      3542 9414 3561 9403 3567 9370
TIME...MOT...LOC 0512Z 266DEG 44KT 3560 9396 3543 9406 3530 9432

Lacy

Local storm report, May 28, 12:34 AM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1234 AM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1215 AM     HAIL             6 NNE PEORIA            37.00N 94.63W
05/28/2017  E1.75 INCH       OTTAWA             OK   PUBLIC

            GOLFBALL SIZE HAIL REPORTED AT DOWNSTREAM CASINO

&&

EJC

Local storm report, May 28, 12:36 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1236 AM CDT SUN MAY 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1225 AM     TSTM WND GST     CLAYTON                 34.59N 95.35W
05/28/2017  E70 MPH          PUSHMATAHA         OK   TRAINED SPOTTER

&&

AEJ

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 10:14 PM CDT	Special Weather Statement	TSA	Adair	46 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, 10:45 PM CDT	Areal Flood Advisory	TSA	Adair	3 hr
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, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	35 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, 12:58 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	32 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 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.