Alert archive / Oklahoma / Special Weather Statements in 2020

Special Weather Statement, NWS Tulsa, OK

April 22, 2020Sequoyah County, Oklahoma; Crawford County, Arkansas

NWS Tulsa, OK issued this special weather statement at Apr 22, 2020, 6:02 AM CDT for Sequoyah County, Oklahoma; Crawford County, Arkansas. It was in force for 43 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: Apr 22, 2020, 6:02 AM CDT (11:02 UTC)
Expired: Apr 22, 2020, 6:45 AM CDT
In force: 43 min
Issued by: NWS Tulsa, OK

Counties Crawford County, AR, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 33 km from the middle of the area, began a volume at 11:03 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, 11.0 hours before the alert went out and 162 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: 2596 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 37 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 Apr 22, 4:16 AM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, Apr 22, 4:16 AM CDT, 1 hour 46 minutes before

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</head>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Apr 22, 5:26 AM CDT, 36 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
526 AM CDT Wed Apr 22 2020

ARZ001-002-010-011-019-020-029-OKZ049-053>076-231030-
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-
526 AM CDT Wed Apr 22 2020

...SEVERE STORMS AND FLOODING POSSIBLE TODAY...

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

.DAY ONE...Today and Tonight.
TORNADO.
	RISK...Elevated.
	AREA...Far Southeast Oklahoma.
	ONSET...Late this afternoon.

SEVERE THUNDERSTORM.
	RISK...Elevated to Significant.
	AREA...Eastern Oklahoma.
	ONSET...This afternoon.

	AREA AT GREATEST RISK...Southeast Oklahoma.

FLASH FLOOD.
	RISK...Limited.
	AREA...Northeast Oklahoma.
	ONSET...After 7 AM.

HEAVY RAIN.
	RISK...Significant.
	AREA...Northeast Oklahoma.
	ONSET...After 7 AM.

	AREA AT GREATEST RISK...Along and north of I-44, west of highway 69
							in northeast Oklahoma.

SIGNIFICANT WINDS.
	RISK...Limited.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...Mid Morning.

DISCUSSION...

There is an elevated to significant threat of severe storms across
the region, mainly this afternoon and evening along and south of
I-40 in east central and southeast Oklahoma. Large hail to tennis
ball size, damaging winds and tornadoes, some possibly strong,
are possible with any discrete cells across this region. Across
northeast Oklahoma and northwest Arkansas, multiple rounds of
storms are expected today, with mainly a large hail threat. In
addition, storms could train over the same areas and produce
swaths of locally heavy rainfall and increase the threat of flash
flooding.

Strong southeast winds are expected today as low pressure
approaches the region. Winds may gust in the 30 to 40 mph range
at times across northeast Oklahoma and northwest Arkansas.

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

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY...Thunderstorm Potential.
FRIDAY...Thunderstorm Potential...Heavy Rain Potential.
SATURDAY THRU MONDAY...No Hazards.
TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...

Thunderstorm chances increase again Thursday night into Friday as
an upper level disturbance slides across the region. Any storms
that develop over the region will likely be elevated, and capable
of producing marginally severe hail, especially across southeast
Oklahoma and west central Arkansas, on Friday afternoon.

The active pattern continues, with another system expected to
bring chances for storms again by early next week.

weather.gov/tulsa contains additional information.

Lacy

In the hours before

Special weather statement, Apr 22, 3:06 AM CDT, 2 hours 56 minutes before

Special Weather Statement
National Weather Service Tulsa OK
306 AM CDT Wed Apr 22 2020

OKZ073-220830-
Pittsburg OK-
306 AM CDT Wed Apr 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PITTSBURG COUNTY
UNTIL 330 AM CDT...

At 306 AM CDT, strong thunderstorms were located along a line
extending from 2 miles north of Ashland to 4 miles west of Daisy.
Movement was northeast at 40 mph.

Penny size hail and winds in excess of 40 mph will be possible with
these storms.

Locations in or near the path include...
Mcalester...                      Krebs...
Kiowa...                          Savanna...
Alderson...                       Ashland...
Mcalester Regional Airport...     Haywood...
Scipio...                         Blanco...
Pittsburg...                      Arpelar...

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
southeastern Oklahoma.

LAT...LON 3468 9589 3468 9605 3472 9609 3493 9609
      3514 9590 3471 9551 3460 9552 3459 9588
TIME...MOT...LOC 0806Z 238DEG 33KT 3480 9608 3454 9582

Special weather statement, Apr 22, 3:25 AM CDT, 2 hours 37 minutes before

Special Weather Statement
National Weather Service Tulsa OK
325 AM CDT Wed Apr 22 2020

OKZ049-053-220900-
Choctaw OK-Pushmataha OK-
325 AM CDT Wed Apr 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN PUSHMATAHA AND NORTHERN
CHOCTAW COUNTIES UNTIL 400 AM CDT...

At 324 AM CDT, a strong thunderstorm was located 7 miles west of
Kent. Another strong thunderstorm was located near Apple. Both
storms were moving east at 45 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
these storms.

Locations in or near the path include...
Antlers...                        Fort Towson...
Sawyer...                         Rattan...
Kent...                           Messer...
Hugo Lake State Park...           Kellond...
Oleta...                          Cloudy...
Corinne...                        Sobol...
Swink...                          Darwin...
Apple...                          Speer...
Dela...

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
southeastern Oklahoma.

LAT...LON 3406 9583 3416 9583 3416 9578 3425 9578
      3433 9505 3424 9505 3424 9515 3399 9516
TIME...MOT...LOC 0824Z 269DEG 38KT 3415 9574

Special weather statement, Apr 22, 5:26 AM CDT, 36 minutes before

Special Weather Statement
National Weather Service Tulsa OK
526 AM CDT Wed Apr 22 2020

ARZ010-OKZ068>070-072-074-076-221100-
Washington AR-Haskell OK-Adair OK-Muskogee OK-Sequoyah OK-
Cherokee OK-Le Flore OK-
526 AM CDT Wed Apr 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL WASHINGTON...
HASKELL...SEQUOYAH...SOUTHERN ADAIR...NORTHWESTERN LE FLORE...
SOUTHEASTERN CHEROKEE AND SOUTHEASTERN MUSKOGEE COUNTIES UNTIL 600 AM
CDT...

At 521 AM CDT, strong southeasterly wind gusts up to 50 mph were
occurring on the west side of a dissipating thunderstorm complex
moving eastward through east central Oklahoma. The back edge of the
dissipating complex is moving to the east at 40 mph, and the
stronger winds will develop once the rain stops. The gusty winds
will persist for up to half an hour once they begin.

Locations in or near the path include...
Sallisaw...                       Stigler...
Muldrow...                        Roland...
Spiro...                          Vian...
Gore...                           Porum...
Webbers Falls...                  Keota...
Mccurtain...                      Bokoshe...
Whitefield...                     Winslow...
Gans...                           Kinta...
Marble City...                    Tamaha...
Brushy...                         Mc Curtain...

This includes the following highways,
 Interstate 40 in Oklahoma between mile markers 280 and 328.
 Interstate 49 between mile markers 41 and 42.

LAT...LON 3575 9416 3575 9449 3545 9444 3512 9474
      3511 9535 3516 9535 3516 9545 3531 9536
      3529 9535 3534 9535 3572 9509 3579 9412
TIME...MOT...LOC 1021Z 264DEG 40KT 3563 9483 3520 9523

Special weather statement, Apr 22, 6:02 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
602 AM CDT Wed Apr 22 2020

ARZ010-011-019-020-029-OKZ069-072-221145-
Sebastian AR-Madison AR-Washington AR-Franklin AR-Crawford AR-
Adair OK-Sequoyah OK-
602 AM CDT Wed Apr 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MADISON...
NORTHWESTERN FRANKLIN...CRAWFORD...NORTHWESTERN SEBASTIAN...SOUTHERN
WASHINGTON...SEQUOYAH AND SOUTHERN ADAIR COUNTIES UNTIL 645 AM CDT...

At 559 AM CDT, strong wind gusts on the back side of a dissipating
thunderstorm complex are occurring across east central Oklahoma and
will slide over into west central Arkansas. The strongest wind gusts
will occur after the rain ends and may continue for up to a half
hour after the rain ends.

Wind gusts up to 50 mph will be possible.

Locations in or near the path include...
Fort Smith...                     Van Buren...
Sallisaw...                       Stilwell...
Cedarville...                     Mountainburg...
Natural Dam...                    Alma...
Muldrow...                        Roland...
West Fork...                      Lincoln...
Mulberry...                       Vian...
Dyer...                           Winslow...
Gans...                           Marble City...
Chester...                        Moffett...

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 0 and 18.
 Interstate 40 in Oklahoma between mile markers 296 and 328.
 Interstate 540 between mile markers 1 and 8.
 Interstate 49 between mile markers 22 and 53.

LAT...LON 3594 9358 3535 9433 3536 9443 3538 9443
      3538 9447 3536 9449 3540 9495 3541 9500
      3543 9502 3564 9484 3564 9481 3567 9481
      3594 9457
TIME...MOT...LOC 1059Z 272DEG 23KT 3581 9428 3543 9482

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 2:33 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	57 min
Apr 22, 3:06 AM CDT	Special Weather Statement	TSA	Pittsburg	24 min
Apr 22, 3:11 AM CDT	Flash Flood Watch	TSA	Craig, Creek, Mayes, Nowata, Pawnee, Rogers and 3 more	16 hr
Apr 22, 3:25 AM CDT	Special Weather Statement	TSA	Choctaw	35 min
Apr 22, 5:26 AM CDT	Special Weather Statement	TSA	Haskell, Sequoyah	34 min
Apr 22, 6:19 AM CDT	Special Weather Statement	TSA	Pawnee	41 min
Apr 22, 6:30 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	45 min
Apr 22, 6:44 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	35 min
Apr 22, 7:00 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	45 min
Apr 22, 7:39 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	51 min
Apr 22, 8:08 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Rogers, Tulsa, Washington	52 min
Apr 22, 8:16 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	29 min
Apr 22, 8:17 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	22 min
Apr 22, 8:30 AM CDT	Severe Thunderstorm Warning	TSA	Osage	30 min
Apr 22, 8:31 AM CDT	Areal Flood Advisory	TSA	Osage, Pawnee	4 hr
Apr 22, 8:34 AM CDT	Special Weather Statement	TSA	Sequoyah	41 min
Apr 22, 8:45 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Rogers, Tulsa, Wagoner	45 min
Apr 22, 9:06 AM CDT	Special Weather Statement	TSA	Pushmataha	39 min
Apr 22, 9:28 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	21 min
Apr 22, 9:35 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee, Tulsa	25 min
Apr 22, 10:05 AM CDT	Special Weather Statement	TSA	Tulsa	25 min
Apr 22, 10:08 AM CDT	River Flood Advisory	TSA	Cherokee	36 hr
Apr 22, 10:16 AM CDT	Special Weather Statement	TSA	Cherokee, Muskogee	44 min
Apr 22, 10:42 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	48 min
Apr 22, 11:18 AM CDT	Special Weather Statement	TSA	Muskogee	27 min
Apr 22, 11:31 AM CDT	Special Weather Statement	TSA	McIntosh	29 min
Apr 22, 11:38 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	37 min
Apr 22, 11:45 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	30 min
Apr 22, 12:06 PM CDT	Special Weather Statement	TSA	Creek	24 min
Apr 22, 12:10 PM CDT	Special Weather Statement	TSA	Okmulgee	35 min
Apr 22, 12:13 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	32 min
Apr 22, 12:13 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	47 min
Apr 22, 12:24 PM CDT	Special Weather Statement	TSA	Osage	36 min
Apr 22, 12:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	29 min
Apr 22, 12:50 PM CDT	Special Weather Statement	TSA	LeFlore	40 min
Apr 22, 12:58 PM CDT	Special Weather Statement	TSA	Osage	32 min
Apr 22, 1:06 PM CDT	Areal Flood Advisory	TSA	McIntosh, Muskogee, Okmulgee	3 hr
Apr 22, 1:07 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	23 min
Apr 22, 1:27 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	48 min
Apr 22, 1:36 PM CDT	Special Weather Statement	TSA	Adair	24 min
Apr 22, 1:50 PM CDT	River Flood Advisory	TSA	Adair, Cherokee, Delaware	36 hr
Apr 22, 2:41 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	34 min
Apr 22, 3:13 PM CDT	Severe Thunderstorm Warning	TSA	Osage	32 min
Apr 22, 3:20 PM CDT	Special Weather Statement	TSA	Kay	25 min
Apr 22, 3:43 PM CDT	Special Weather Statement	TSA	Washington	32 min
Apr 22, 4:09 PM CDT	Special Weather Statement	TSA	Pawnee	36 min
Apr 22, 5:40 PM CDT	Special Weather Statement	TSA	Okfuskee	35 min
Apr 22, 5:55 PM CDT	Tornado Warning	TSA	Choctaw	50 min
Apr 22, 6:00 PM CDT	Tornado Warning Tornado observed	TSA	Choctaw, Pushmataha	30 min
Apr 22, 6:02 PM CDT	Special Weather Statement	TSA	Pittsburg	43 min
Apr 22, 6:03 PM CDT	Special Weather Statement	TSA	Creek	27 min
Apr 22, 6:08 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	37 min
Apr 22, 6:25 PM CDT	Special Weather Statement	TSA	Rogers, Tulsa	50 min
Apr 22, 6:32 PM CDT	Special Weather Statement	TSA	Choctaw	28 min
Apr 22, 6:40 PM CDT	Special Weather Statement	TSA	Pushmataha	35 min
Apr 22, 6:42 PM CDT	Special Weather Statement	TSA	Latimer	33 min
Apr 22, 6:45 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	45 min
Apr 22, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	61 min
Apr 22, 10:08 AM CDT	Special Weather Statement	TSA	Franklin	37 min
Apr 22, 1:56 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	19 min

Nearby

Special Weather Statements in Oklahoma, 2020 Special Weather Statements in Arkansas, 2020 Every special weather statement in 2020

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.