Alert archive / Oklahoma / Areal Flood Advisories in 2021

Areal Flood Advisory 145, NWS Tulsa, OK

October 13, 2021Pittsburg County, Oklahoma

NWS Tulsa, OK issued this areal flood advisory at Oct 13, 2021, 8:05 PM CDT for Pittsburg County, Oklahoma. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Oct 13, 2021, 8:05 PM CDT (01:05 UTC)
Expired: Oct 13, 2021, 11:15 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 133 km from the middle of the area, began a volume at 01:06 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, 1.1 hours before the alert went out and 281 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: 332 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 690 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 213 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at Oct 13, 6:40 PM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, Oct 13, 6:40 PM CDT, 1 hour 25 minutes before

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Hazardous weather outlook, Oct 13, 7:40 PM CDT, 25 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
740 PM CDT Wed Oct 13 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-141015-
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-
740 PM CDT Wed Oct 13 2021

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

.DAY ONE...Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Eastern Oklahoma, Northwestern Arkansas, east of Highway 69.
	ONSET...Ongoing.

FLASH FLOOD.
	RISK...Limited.
	AREA...Southeastern Oklahoma and Northwestern Arkansas.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Elevated.
	AREA...Southeastern Oklahoma and Northwestern Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Thunderstorms are expected to continue to develop across eastern
Oklahoma and northwestern Arkansas through tonight. Atmospheric
instability has decreased this evening across the area, but enough
will persist overnight, combined with the wind shear that is
present, to support a limited threat of severe weather.

Heavy rainfall will become more of a concern, as tropical
moisture continues to stream into the area. Thunderstorms will be
capable of producing very heavy rainfall rates. Some repeat
activity over the same areas is also possible as the storms move
to the northeast. A Flash Flood Watch remains in effect for much
of southeastern Oklahoma and northwestern Arkansas.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY...Thunderstorm Potential.
FRIDAY...Thunderstorm Potential...High Wind Potential.
SATURDAY through TUESDAY...No Hazards.

EXTENDED DISCUSSION...
There is a limited risk of severe storms Thursday afternoon and night
across northeast Oklahoma, eventually spreading into northwest
Arkansas by early Friday ahead of a strong cold front. Large hail and
damaging winds are the primary threats.

Strong north winds can be expected on Friday behind a strong cold
front, with gusts 30 to 35 mph expected across eastern Oklahoma.

weather.gov/tulsa contains additional information.

69

In the hours before

Special weather statement, Oct 13, 3:39 PM CDT, 4 hours 26 minutes before

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Special weather statement, Oct 13, 4:51 PM CDT, 3 hours 14 minutes before

Special Weather Statement
National Weather Service Tulsa OK
451 PM CDT Wed Oct 13 2021

OKZ049-074>076-132230-
Haskell OK-Latimer OK-Pushmataha OK-Le Flore OK-
451 PM CDT Wed Oct 13 2021

...Strong thunderstorms will impact portions of southeastern
Haskell, north central Pushmataha, central Latimer and central Le
Flore Counties through 530 PM CDT...

At 449 PM CDT, Doppler radar indicated strong thunderstorms moving
across northern Pushmataha, eastern Latimer, and Le Flore Counties,
moving northeast at 40 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree small limbs and blow
         around unsecured objects. Minor damage to outdoor objects
         is possible.

Locations in or near the path include...
Poteau...                         Clayton...
Pocola...                         Heavener...
Spiro...                          Panama...
Talihina...                       Wister...
Howe...                           Red Oak...
Bokoshe...                        Fanshawe...
Cameron...                        Albion...
Talimena State Park...            Tuskahoma...
Kiamichi...                       Damon...
Bengal...                         Yanush...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3473 9548 3504 9506 3522 9480 3531 9444
      3498 9445 3450 9526
TIME...MOT...LOC 2149Z 231DEG 33KT 3460 9523

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

69

Special weather statement, Oct 13, 4:57 PM CDT, 3 hours 8 minutes before

Special Weather Statement
National Weather Service Tulsa OK
457 PM CDT Wed Oct 13 2021

OKZ049-076-132300-
Pushmataha OK-Le Flore OK-
457 PM CDT Wed Oct 13 2021

...A strong thunderstorm will impact portions of eastern Pushmataha
and southwestern Le Flore Counties through 600 PM CDT...

At 456 PM CDT, Doppler radar indicated a strong thunderstorm 3 miles
east of Nashoba, moving northeast at 30 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations in or near the path include...
Rattan...                         Nashoba...
Whitesboro...                     Oleta...
Muse...                           Cloudy...
Corinne...                        Honobia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3417 9542 3449 9530 3484 9469 3451 9471
      3451 9504 3425 9505 3424 9515 3420 9515
TIME...MOT...LOC 2156Z 235DEG 24KT 3449 9516

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

69

Special weather statement, Oct 13, 5:24 PM CDT, 2 hours 41 minutes before

Special Weather Statement
National Weather Service Tulsa OK
524 PM CDT Wed Oct 13 2021

ARZ019-029-OKZ072-076-132315-
Sebastian AR-Crawford AR-Sequoyah OK-Le Flore OK-
524 PM CDT Wed Oct 13 2021

...A strong thunderstorm will impact portions of southwestern
Crawford, Sebastian, southeastern Sequoyah and northeastern Le Flore
Counties through 615 PM CDT...

At 523 PM CDT, Doppler radar indicated a strong thunderstorm over
Pocola, moving northeast at 40 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down small tree limbs and blow
         around unsecured objects.

Locations in or near the path include...
Fort Smith...                     Van Buren...
Charleston...                     Greenwood...
Alma...                           Barling...
Pocola...                         Lavaca...
Spiro...                          Arkoma...
Mulberry...                       Mansfield...
Dyer...                           Hackett...
Hartford...                       Huntington...
Bonanza...                        Midland...
Cameron...                        Moffett...

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 2 and 21.
 Interstate 540 between mile markers 1 and 14.
 Interstate 49 between mile markers 22 and 24.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3514 9414 3510 9414 3506 9425 3506 9423
      3497 9424 3495 9434 3496 9437 3494 9439
      3495 9441 3493 9443 3493 9444 3491 9445
      3490 9448 3533 9468 3562 9407 3514 9408
TIME...MOT...LOC 2223Z 234DEG 36KT 3521 9449

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

69

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 8:44 PM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, LeFlore, Pushmataha	5 hr
Oct 13, 9:08 PM CDT	Special Weather Statement	TSA	Latimer	52 min
Oct 13, 9:39 PM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, LeFlore, Muskogee, Pittsburg, Sequoyah	4 hr
Oct 14, 1:45 AM CDT	Areal Flood Advisory	TSA	LeFlore	3 hr
Oct 13, 11:35 PM CDT	Areal Flood Advisory	TSA	Carroll, Madison, Washington	3 hr

Nearby

Areal Flood Advisories in Oklahoma, 2021 Every areal flood advisory in 2021

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.