Alert archive / Arkansas / Special Weather Statements in 2017

Special Weather Statement, NWS Tulsa, OK

October 22, 20174 counties in Arkansas

NWS Tulsa, OK issued this special weather statement at Oct 22, 2017, 12:13 AM CDT for 4 counties in Arkansas. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 22, 2017, 12:13 AM CDT (05:13 UTC)
Expired: Oct 22, 2017, 12:45 AM CDT
In force: 32 min
Issued by: NWS Tulsa, OK

Counties Carroll County, AR, Crawford County, AR, Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 79 km from the middle of the area, began a volume at 05:16 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.2 hours before the alert went out and 108 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: 700 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 21, 9:36 PM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Oct 21, 9:36 PM CDT, 2 hours 37 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
936 PM CDT Sat Oct 21 2017

.DISCUSSION...

The event is underway across northeast OK this evening. The cold
front extended from near KC down into northeast OK, just to the
north and west of Tulsa, and then down into south central OK at 9
PM. The line of storms which developed late into the afternoon and
evening from southwest into north central OK will now begin to
move more quickly to the southeast for the remainder of the night
in tandem with the cold front. Damaging winds will be the primary
threat, but a few reports of large hail and an isolated tornado or
two is possible. The tornado threat will be heavily dependant on
whether storms can keep up with the surging front. Any echoes that
can develop right on and move in tandem with the front will pose
the better tornadic risk. The line of storms should exit western
Arkansas in the 3 to 5 am time frame. The forecast has been
updated to adjust thunder probs both behind the convective line
and later on tonight into Sunday morning.

Lacy

&&

.PREV DISCUSSION... /Issued 641 PM CDT Sat Oct 21 2017/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
Cold front extended from Topeka to Weatherford this evening.
Strong to severe thunderstorms will affect all terminals within
the next few hours. Best potential for severe gusts will be with
initial line, affecting KBVO/KTUL/KRVS before midnight. A
prolonged period of rain may reduce visibility and ceilings for
several hours. Wind threat will diminish as cold front eventually
undercuts the convective line.

SHORT TERM...08
AVIATION...06

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   52  74  46  76 / 100   0   0   0
FSM   58  72  45  78 / 100  40   0   0
MLC   54  72  45  79 / 100  10   0   0
BVO   50  74  39  76 / 100   0   0   0
FYV   54  64  40  72 / 100  30   0   0
BYV   55  65  43  73 / 100  40   0   0
MKO   53  71  45  77 / 100  10   0   0
MIO   52  69  43  74 / 100  10   0   0
F10   53  72  46  78 / 100   0   0   0
HHW   58  74  46  80 / 100  20   0   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...None.
AR...None.
&&

LONG TERM....30

Hazardous weather outlook, Oct 21, 5:17 PM CDT, 6 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
517 PM CDT Sat Oct 21 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-221045-
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-
517 PM CDT Sat Oct 21 2017

...Severe Thunderstorms Expected to Sweep Through Tonight...

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

.DAY ONE...Today and Tonight.
TORNADO.
	RISK...Limited.
	AREA...All of eastern Oklahoma and northwest Arkansas.
	ONSET...After 7pm...ending by 3am in Carroll and Madison Counties.

SEVERE THUNDERSTORM.
	RISK...Significant.
	AREA...All of eastern Oklahoma and northwest Arkansas.
	ONSET...After 7pm...end by 3am in Carroll and Madison Counties.

FLASH FLOOD.
	RISK...Elevated.
	AREA...Eastern Oklahoma...with a lesser threat in northwest Arkansas.
	ONSET...After 7pm.

RIVER FLOOD.
	RISK...Elevated.
	AREA...Northeast Oklahoma.
	ONSET...Ongoing.

DISCUSSION...
Thunderstorms will increase and spread across eastern Oklahoma and
northwest Arkansas this evening.  While a few storms could develop
ahead of the cold front, especially in the terrain of southeast
Oklahoma and northwest Arkansas, the main round of severe is expected
with storms developing a near a cold front moving in from the northwest.
Initial individual storm cell development to the west will transition to
a line of storms this evening that will sweep through the entire area.
While some potential for hail exits, especially earlier in the evening,
the main risk will be damaging wind and the potential for areas of rotation
to form within the line.  Because of this rotation potential, there is
some tornado threat anywhere along the line.  Scattered areas of strong
winds are also expected within the line.  Gusts of 60 to 70 mph are
expected in the most intense storms.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.
SUNDAY...Thunderstorm Potential.
MONDAY...No Hazards.
TUESDAY...High Wind Potential.
WEDNESDAY...No Hazards.
THURSDAY...Thunderstorm Potential.
FRIDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Thunderstorms will be ending from west to east later tonight
and early on Sunday morning.  Another front late next week is
expected to bring more thunderstorm chances on Thursday and Friday.
Rainfall tonight is expected to drive some creeks and rivers up
in northeast Oklahoma over the next couple of days.  A Flood
Warning is currently up for the Neosho River at Commerce, OK.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
Emergency managers will need to activate their spotter networks tonight.
The evolution of circulations in squall lines can be very quick with
few visual clues for spotters and limited warning opportunities.  Spotters
should exercise caution and not attempt to intercept areas of rotation
where visibility is low.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Oct 21, 11:27 PM CDT, 46 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1127 PM CDT SAT OCT 21 2017

ARZ001-010-019-OKZ063-068>070-072-220515-
Benton AR-Washington AR-Crawford AR-Adair OK-Muskogee OK-Sequoyah OK-
Cherokee OK-Delaware OK-
1127 PM CDT SAT OCT 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR BENTON...NORTHWESTERN CRAWFORD...
WESTERN WASHINGTON...SOUTHEASTERN DELAWARE...NORTHERN SEQUOYAH...
ADAIR...CHEROKEE AND NORTHEASTERN MUSKOGEE COUNTIES UNTIL 1215 AM
CDT...

At 1126 PM CDT, strong thunderstorms were located along a line
extending from 3 miles northeast of South West City to 4 miles north
of Keefeton. Movement was east at 25 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations in or near the path include...
Fayetteville...                   Springdale...
Rogers...                         Muskogee...
Bentonville...                    Tahlequah...
Siloam Springs...                 Stilwell...
Cedarville...                     Natural Dam...
Bella Vista...                    Lowell...
Farmington...                     Pea Ridge...
Prairie Grove...                  Fort Gibson...
Gentry...                         Tontitown...
Bethel Heights...                 Gravette...

This includes Interstate 49 between mile markers 61 and 84, and
between mile markers 86 and 93.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A tornado watch remains in effect until 200 AM CDT for northeastern
and east central Oklahoma.

LAT...LON 3650 9462 3650 9403 3554 9437 3561 9545
      3652 9463 3652 9462
TIME...MOT...LOC 0426Z 272DEG 23KT 3654 9456 3566 9532

Special weather statement, Oct 21, 11:30 PM CDT, 43 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1130 PM CDT SAT OCT 21 2017

ARZ019-OKZ049-070>076-220515-
Crawford AR-Haskell OK-Pittsburg OK-Muskogee OK-Latimer OK-
Sequoyah OK-Pushmataha OK-Le Flore OK-McIntosh OK-
1130 PM CDT SAT OCT 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CRAWFORD...
HASKELL...PUSHMATAHA...EAST CENTRAL MCINTOSH...SEQUOYAH...LATIMER...
CENTRAL LE FLORE...EASTERN PITTSBURG AND SOUTHEASTERN MUSKOGEE
COUNTIES UNTIL 1215 AM CDT...

At 1129 PM CDT, strong thunderstorms were located along a line
extending from near Braggs to 8 miles southwest of Daisy. Movement
was east at 45 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations in or near the path include...
Fort Smith...                     Van Buren...
Sallisaw...                       Poteau...
Wilburton...                      Stigler...
Clayton...                        Muldrow...
Roland...                         Spiro...
Hartshorne...                     Arkoma...
Warner...                         Vian...
Panama...                         Talihina...
Wister...                         Quinton...
Gore...                           Porum...

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 0 and 2.
 Interstate 40 in Oklahoma between mile markers 273 and 328.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

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

LAT...LON 3443 9578 3451 9578 3451 9567 3459 9567
      3460 9582 3560 9529 3553 9434 3545 9439
      3545 9441 3537 9443 3450 9491 3450 9505
      3425 9505
TIME...MOT...LOC 0429Z 265DEG 56KT 3567 9516 3443 9581

Local storm report, Oct 21, 11:38 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1138 PM CDT SAT OCT 21 2017

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

1136 PM     HAIL             TAHLEQUAH               35.92N 94.97W
10/21/2017  E0.75 INCH       CHEROKEE           OK   AMATEUR RADIO

&&

JDS

Local storm report, Oct 21, 11:56 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1156 PM CDT SAT OCT 21 2017

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

1153 PM     TSTM WND GST     LAKE TENKILLER STATE PA 35.61N 95.03W
10/21/2017  E60 MPH          SEQUOYAH           OK   EMERGENCY MNGR

&&

JDS

Special weather statement, Oct 21, 11:56 PM CDT, 17 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1156 PM CDT SAT OCT 21 2017

OKZ049-053-220545-
Choctaw OK-Pushmataha OK-
1156 PM CDT SAT OCT 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PUSHMATAHA AND
CENTRAL CHOCTAW COUNTIES UNTIL 1245 AM CDT...

At 1155 PM CDT, strong thunderstorms were located along a line
extending from 7 miles south of Daisy to 11 miles south of Boswell.
Movement was east at 20 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations in or near the path include...
Hugo...                           Antlers...
Rattan...                         Soper...
Kent...                           Goodland...
Messer...                         Moyers...
Kosoma...                         Kellond...
Hugo Lake State Park...           Grant...
Ord...                            Fallon...
Apple...                          Speer...
Dela...                           Unger...
Finley...                         Gay...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A tornado watch remains in effect until 200 AM CDT for southeastern
Oklahoma.

LAT...LON 3387 9546 3389 9546 3387 9551 3389 9551
      3388 9554 3393 9556 3394 9560 3391 9564
      3391 9567 3388 9570 3390 9574 3389 9576
      3389 9585 3416 9581 3416 9578 3435 9578
      3442 9577 3431 9533 3387 9542
TIME...MOT...LOC 0455Z 268DEG 12KT 3443 9573 3386 9587

Special weather statement, Oct 22, 12:13 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1213 AM CDT SUN OCT 22 2017

ARZ001-002-010-011-019-020-OKZ069-072-220545-
Carroll AR-Madison AR-Benton AR-Washington AR-Franklin AR-
Crawford AR-Adair OK-Sequoyah OK-
1213 AM CDT SUN OCT 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BENTON...MADISON...
NORTHWESTERN FRANKLIN...NORTHERN CRAWFORD...CARROLL...WASHINGTON...
NORTHEASTERN SEQUOYAH AND SOUTHEASTERN ADAIR COUNTIES UNTIL 1245 AM
CDT...

At 1212 AM CDT, strong thunderstorms were located along a line
extending from 3 miles north of Garfield to near Brushy. Movement was
east at 35 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations in or near the path include...
Fayetteville...                   Springdale...
Rogers...                         Berryville...
Huntsville...                     Eureka Springs...
Cedarville...                     Mountainburg...
Natural Dam...                    Lowell...
Farmington...                     Prairie Grove...
Green Forest...                   Elkins...
Tontitown...                      Bethel Heights...
West Fork...                      Lincoln...
Cave Springs...                   Greenland...

This includes Interstate 49 between mile markers 27 and 83.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A tornado watch remains in effect until 200 AM CDT for northeastern
and east central Oklahoma.

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

LAT...LON 3557 9398 3558 9479 3650 9404 3649 9332
TIME...MOT...LOC 0512Z 267DEG 67KT 3649 9400 3556 9475

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 21, 7:36 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	39 min
Oct 21, 8:13 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Washington	47 min
Oct 21, 9:09 PM CDT	Special Weather Statement	TSA	Nowata, Tulsa, Washington	36 min
Oct 21, 9:26 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers, Washington	34 min
Oct 21, 9:41 PM CDT	Special Weather Statement	TSA	Creek, Rogers, Tulsa	34 min
Oct 21, 9:53 PM CDT	Special Weather Statement	TSA	Mayes, Okmulgee, Rogers, Tulsa, Wagoner	37 min
Oct 21, 10:05 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	25 min
Oct 21, 10:11 PM CDT	Areal Flood Advisory	TSA	Creek, Osage, Rogers, Tulsa, Wagoner	2 hr
Oct 21, 10:28 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	47 min
Oct 21, 10:42 PM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	48 min
Oct 21, 10:47 PM CDT	Special Weather Statement	TSA	Wagoner	43 min
Oct 21, 11:27 PM CDT	Special Weather Statement	TSA	Adair, Cherokee, Muskogee	48 min
Oct 21, 11:30 PM CDT	Special Weather Statement	TSA	Haskell, Latimer, LeFlore, Pushmataha, Sequoyah	45 min
Oct 21, 11:33 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Delaware, Mayes, Muskogee, Wagoner	117 min
Oct 21, 11:56 PM CDT	Special Weather Statement	TSA	Choctaw	49 min
Oct 22, 12:04 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg, Pushmataha	41 min
Oct 22, 12:16 AM CDT	Special Weather Statement	TSA	Sequoyah	44 min
Oct 22, 12:41 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	34 min
Oct 22, 12:46 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	29 min
Oct 22, 12:53 AM CDT	Special Weather Statement	TSA	LeFlore	52 min
Oct 22, 1:08 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	37 min
Oct 22, 12:57 AM CDT	Special Weather Statement	TSA	Carroll, Madison	48 min
Oct 22, 1:42 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Sebastian, Washington	33 min

Nearby

Special Weather Statements in Arkansas, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.