Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

May 11, 20215 counties in Oklahoma; Crawford County, Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at May 11, 2021, 12:42 PM CDT for 5 counties in Oklahoma; Crawford County, Sebastian County, Arkansas. It was in force for 48 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: May 11, 2021, 12:42 PM CDT (17:42 UTC)
Expired: May 11, 2021, 1:30 PM CDT
In force: 48 min
Issued by: NWS Tulsa, OK

Counties Crawford County, AR, Sebastian County, AR, Adair County, OK, Cherokee County, OK, Haskell County, OK, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 28 km from the middle of the area, began a volume at 17:46 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 12:00Z, 5.7 hours before the alert went out and 194 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: 1045 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -60 m²/s²
0-3 km storm-relative helicity: 137 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 May 11, 12:23 PM CDT, 19 minutes earlier.

Area forecast discussion, May 11, 12:23 PM CDT, 19 minutes before

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Hazardous weather outlook, May 11, 4:41 AM CDT, 8 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Tulsa OK
441 AM CDT Tue May 11 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-120945-
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-
441 AM CDT Tue May 11 2021

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

.DAY ONE...Today and Tonight.

HEAVY RAIN.
	RISK...Limited.
	AREA...Southeast Oklahoma.
	ONSET...This morning.

THUNDERSTORMS WITH DANGEROUS LIGHTNING.
	RISK...Elevated.
	AREA...Much of eastern Oklahoma and western Arkansas.
	ONSET...This morning.

DISCUSSION...
Widespread showers and scattered thunderstorms are expected
across eastern Oklahoma and western Arkansas today as a weak
upper level disturbance moves across the region. A storm or
two across southeast Oklahoma could become strong to severe
with large hail the concern. Locally heavy rain could also
be of concern across southeast Oklahoma today with upwards of
an inch of rain possible. The showers and thunderstorms are
expected to exit the region this evening.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Spotter Activation Not Expected.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
WEDNESDAY AND THURSDAY...No Hazards.
FRIDAY AND SATURDAY...Thunderstorm Potential.
SUNDAY AND MONDAY...Thunderstorm Potential...Heavy Rain Potential.

EXTENDED DISCUSSION...
After a couple of dry days, an unsettled weather pattern returns.
Showers and storms will be possible over the weekend and into
early next week. Strong to severe storms will be possible Saturday
and Sunday along with the potential for locally heavy rains.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, May 11, 11:35 AM CDT, 1 hour 7 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1135 AM CDT Tue May 11 2021

OKZ065-066-071-073-111700-
Pittsburg OK-Okmulgee OK-Okfuskee OK-McIntosh OK-
1135 AM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MCINTOSH...PITTSBURG...
SOUTH CENTRAL OKMULGEE AND SOUTHEASTERN OKFUSKEE COUNTIES UNTIL NOON
CDT...

At 1135 AM CDT, strong thunderstorms were located along a line
extending from 4 miles west of Wetumka to near Calvin to 8 miles
southwest of Ashland. Movement was northeast at 40 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations in or near the path include...
Mcalester...                      Henryetta...
Krebs...                          Weleetka...
Dewar...                          Kiowa...
Savanna...                        Crowder...
Alderson...                       Canadian...
Indianola...                      Grayson...
Hanna...                          Hoffman...
Ashland...                        Raiford...
Haywood...                        Vivian...
Mcalester Regional Airport...     Scipio...

This includes Interstate 40 in Oklahoma between mile markers 233 and
251.

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.

LAT...LON 3555 9579 3522 9565 3472 9556 3466 9588
      3468 9589 3468 9609 3505 9609 3506 9607
      3509 9606 3512 9603 3512 9601 3515 9601
      3515 9598 3529 9598 3529 9635 3530 9635
TIME...MOT...LOC 1635Z 242DEG 37KT 3523 9632 3499 9624 3469 9620

Special weather statement, May 11, 12:02 PM CDT, 40 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1202 PM CDT Tue May 11 2021

OKZ068-070>076-111745-
Haskell OK-Pittsburg OK-Muskogee OK-Latimer OK-Sequoyah OK-
Cherokee OK-Le Flore OK-McIntosh OK-
1202 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR HASKELL...MCINTOSH...WESTERN
SEQUOYAH...LATIMER...NORTHWESTERN LE FLORE...EASTERN PITTSBURG...
SOUTH CENTRAL CHEROKEE AND SOUTHEASTERN MUSKOGEE COUNTIES UNTIL 1245
PM CDT...

At 1202 PM CDT, strong thunderstorms were located along a line
extending from 4 miles west of Stidham to 2 miles south of Crowder to
7 miles east of Blanco. Movement was east at 50 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations in or near the path include...
Wilburton...                      Eufaula...
Stigler...                        Checotah...
Hartshorne...                     Krebs...
Warner...                         Vian...
Quinton...                        Gore...
Porum...                          Webbers Falls...
Keota...                          Red Oak...
Mccurtain...                      Crowder...
Fanshawe...                       Whitefield...
Alderson...                       Kinta...

This includes Interstate 40 in Oklahoma between mile markers 253 and
300.

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.

&&

LAT...LON 3468 9571 3507 9572 3539 9587 3575 9505
      3536 9486 3489 9485
TIME...MOT...LOC 1702Z 247DEG 45KT 3535 9578 3509 9566 3478 9565

Special weather statement, May 11, 12:42 PM CDT, 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
May 10, 7:44 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	61 min
May 10, 9:04 PM CDT	Special Weather Statement	TSA	Choctaw	41 min
May 10, 9:18 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	26 min
May 10, 9:26 PM CDT	Special Weather Statement	TSA	Choctaw	34 min
May 11, 11:35 AM CDT	Special Weather Statement	TSA	Pittsburg	25 min
May 11, 12:02 PM CDT	Special Weather Statement	TSA	Haskell, Latimer, McIntosh	43 min

Nearby

Special Weather Statements in Oklahoma, 2021 Special Weather Statements in Arkansas, 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.