Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

December 17, 2021Sequoyah County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Dec 17, 2021, 9:46 PM CST for Sequoyah County, Oklahoma. It was in force for 44 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: Dec 17, 2021, 9:46 PM CST (03:46 UTC)
Expired: Dec 17, 2021, 10:30 PM CST
In force: 44 min
Issued by: NWS Tulsa, OK
Hail: 0.75 in
Wind: 50

County Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 43 km from the middle of the area, began a volume at 03:49 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, 3.8 hours before the alert went out and 215 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 320 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Dec 17, 9:41 PM CST, 5 minutes earlier.

Area forecast discussion, Dec 17, 9:41 PM CST, 5 minutes before

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Hazardous weather outlook, Dec 17, 5:24 PM CST, 4 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
524 PM CST Fri Dec 17 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-181145-
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-
524 PM CST Fri Dec 17 2021

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

.DAY ONE...This Evening and Tonight.
TORNADO.
	RISK...Limited.
	AREA...Southeast Oklahoma.
	ONSET...Ongoing.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Southeast Oklahoma into Western Arkansas.
	ONSET...Ongoing.

HEAVY RAIN AND FLASH FLOOD.
	RISK...Elevated.
	AREA...East Central and Southeast Oklahoma and also Western
		Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Showers and thunderstorms will continue to spread east and
northeast into this evening ahead of a cold front moving into
northeast Oklahoma. Majority of the activity should be mainly
along and south of Interstate 44 in eastern Oklahoma and also
across northwest Arkansas. A second frontal boundary near
Interstate 40 combined with instability across Southeast Oklahoma
was allowing for a severe weather potential with hail to the size
of quarters and damaging winds the primary threats. A non zero
tornado potential also remained possible along and south of this
second boundary in southeast Oklahoma. These severe potentials
will remain possible into the evening hours.

Ample amounts of moisture over the region was also creating
periods of heavy rainfall with increasing flash flood conditions
across parts of east central and southeast Oklahoma as well as
northwest Arkansas. Additional rainfall of 1 to 2 inches and
locally higher remain possible into tonight across these
locations. A Flood Watch remains in effect through tonight.

Showers and thunderstorms are expected to begin pushing southeast
across the region mid evening into the overnight hours as the cold
front sweeps through eastern Oklahoma and northwest Arkansas.
Severe potentials are forecast to weaken overnight tonight with
precipitation exiting southeast Oklahoma and western Arkansas
Saturday morning.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network May Be Needed.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
SATURDAY...High Wind Potential.
SUNDAY THROUGH THURSDAY...No Hazards.

EXTENDED DISCUSSION...
Breezy north winds and much colder weather are forecast for
Saturday. Dry weather will continue into next week along with a
modest warming trend.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Dec 17, 8:10 PM CST, 1 hour 36 minutes before

Special Weather Statement
National Weather Service Tulsa OK
810 PM CST Fri Dec 17 2021

OKZ073-180245-
Pittsburg OK-
810 PM CST Fri Dec 17 2021

...A strong thunderstorm will impact portions of central Pittsburg
County through 845 PM CST...

At 810 PM CST, Doppler radar indicated a strong thunderstorm 4 miles
west of Mcalester, moving northeast at 35 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Mcalester...                      Krebs...
Crowder...                        Alderson...
Mcalester Regional Airport...     Haywood...
Arpelar...                        Bache...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3484 9596 3493 9601 3515 9565 3489 9551
TIME...MOT...LOC 0210Z 245DEG 30KT 3494 9585

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

Special weather statement, Dec 17, 8:15 PM CST, 1 hour 31 minutes before

Special Weather Statement
National Weather Service Tulsa OK
815 PM CST Fri Dec 17 2021

OKZ073-180245-
Pittsburg OK-
815 PM CST Fri Dec 17 2021

...A strong thunderstorm will impact portions of southwestern
Pittsburg County through 845 PM CST...

At 815 PM CST, Doppler radar indicated a strong thunderstorm 3 miles
northwest of Wardville, moving northeast at 35 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Kiowa...                          Savanna...
Ashland...                        Blanco...
Pittsburg...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3485 9595 3487 9571 3470 9562 3464 9588
      3468 9589 3468 9609 3479 9609
TIME...MOT...LOC 0215Z 244DEG 29KT 3469 9608

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

Local storm report, Dec 17, 8:34 PM CST, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
834 PM CST FRI DEC 17 2021

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

0826 PM     HAIL             1 N MCALESTER           34.95N 95.76W
12/17/2021  M0.50 INCH       PITTSBURG          OK   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

&&

MAT

Special weather statement, Dec 17, 8:39 PM CST, 1 hour 7 minutes before

Special Weather Statement
National Weather Service Tulsa OK
839 PM CST Fri Dec 17 2021

OKZ073>075-180315-
Haskell OK-Pittsburg OK-Latimer OK-
839 PM CST Fri Dec 17 2021

...A strong thunderstorm will impact portions of southwestern
Haskell, northwestern Latimer and northeastern Pittsburg Counties
through 915 PM CST...

At 838 PM CST, Doppler radar indicated a strong thunderstorm 4 miles
southwest of Blocker, 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 limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations in or near the path include...
Quinton...                        Enterprise...
Blocker...                        Robbers Cave State Park...
Featherston...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3488 9563 3505 9573 3526 9539 3499 9519
TIME...MOT...LOC 0238Z 247DEG 33KT 3501 9560

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

Special weather statement, Dec 17, 9:18 PM CST, 28 minutes before

Special Weather Statement
National Weather Service Tulsa OK
918 PM CST Fri Dec 17 2021

OKZ074>076-180400-
Haskell OK-Latimer OK-Le Flore OK-
918 PM CST Fri Dec 17 2021

...A strong thunderstorm will impact portions of south central
Haskell, northern Latimer and west central Le Flore Counties through
1000 PM CST...

At 917 PM CST, Doppler radar indicated a strong thunderstorm near
Robbers Cave State Park, 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 limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations in or near the path include...
Wilburton...                      Stigler...
Red Oak...                        Fanshawe...
Kinta...                          Lequire...
Robbers Cave State Park...        Panola...
Lewisville...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3503 9544 3503 9535 3510 9535 3525 9511
      3498 9479 3488 9534
TIME...MOT...LOC 0317Z 246DEG 36KT 3496 9536

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

Special weather statement, Dec 17, 9:46 PM CST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 6:12 PM CST	Special Weather Statement	TSA	McIntosh	33 min
Dec 17, 6:43 PM CST	Special Weather Statement	TSA	Haskell	32 min
Dec 17, 6:47 PM CST	Special Weather Statement	TSA	Pittsburg	28 min
Dec 17, 6:48 PM CST	Areal Flood Advisory	TSA	Haskell, McIntosh, Muskogee, Pittsburg	4 hr
Dec 17, 7:11 PM CST	River Flood Warning	TSA	Adair, Cherokee, Delaware	40 hr
Dec 17, 7:15 PM CST	Special Weather Statement	TSA	Sequoyah	30 min
Dec 17, 7:17 PM CST	River Flood Advisory	TSA	Cherokee, Delaware	24 hr
Dec 17, 7:17 PM CST	Special Weather Statement	TSA	Pittsburg	28 min
Dec 17, 7:41 PM CST	Special Weather Statement	TSA	Pittsburg	34 min
Dec 17, 7:49 PM CST	Special Weather Statement	TSA	Pittsburg	26 min
Dec 17, 8:10 PM CST	Special Weather Statement	TSA	Pittsburg	35 min
Dec 17, 8:15 PM CST	Special Weather Statement	TSA	Pittsburg	30 min
Dec 17, 8:39 PM CST	Special Weather Statement	TSA	Latimer	36 min
Dec 17, 8:43 PM CST	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	36 min
Dec 17, 9:18 PM CST	Special Weather Statement	TSA	Haskell	42 min
Dec 17, 10:27 PM CST	Areal Flood Advisory	TSA	Adair, Haskell, LeFlore, Sequoyah	4 hr
Dec 17, 11:50 PM CST	Areal Flood Advisory	TSA	Latimer, LeFlore	4 hr

Nearby

Special Weather Statements in Oklahoma, 2021 Every special weather statement 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.