Alert archive / Arkansas / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 322, NWS Tulsa, OK

August 11, 2023Franklin County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 11, 2023, 4:30 AM CDT for Franklin County, Arkansas. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2023, 4:30 AM CDT (09:30 UTC)
Expired: Aug 11, 2023, 4:56 AM CDT
In force: 26 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Franklin County, AR

The radar

The Western Arkansas radar (KSRX), 49 km from the middle of the area, began a volume at 09:29 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, 9.5 hours before the alert went out and 155 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: 330 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 11, 3:31 AM CDT, 59 minutes earlier.

Area forecast discussion, Aug 11, 3:31 AM CDT, 59 minutes before

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Hazardous weather outlook, Aug 10, 4:46 PM CDT, 11 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
446 PM CDT Thu Aug 10 2023

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111030-
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-
446 PM CDT Thu Aug 10 2023

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

.DAY ONE...This Afternoon and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Along and south of Interstate 40.
	ONSET...After midnight.

DANGEROUS HEAT.
	RISK...Elevated.
	AREA...Southeast Oklahoma.
	ONSET...Ongoing...improving after sunset.

DISCUSSION...
Hot and humid conditions will persist through early evening across
southeast Oklahoma. Heat index values around 105 degrees will continue
until sunset.

Isolated to scattered thunderstorms are forecast to develop after
midnight across southeast Oklahoma and west central Arkansas.
A few storms may briefly become severe with large hail the
primary concern.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
FRIDAY through SUNDAY...Thunderstorm  and Dangerous Heat Potential.
MONDAY through WEDNESDAY...No Hazards.

EXTENDED DISCUSSION...
Isolated to scattered thunderstorms may be ongoing Friday morning,
with a general decreasing trend in coverage toward midday.
Additional storms may develop across northeast Oklahoma late Friday
afternoon and persist into the overnight hours. A limited risk of
severe weather will accompany any storms which develop during this
time frame. The weather pattern remains unsettled through the weekend
with daily thunderstorm chances. A cold front passing on Sunday should
mark an increase in storm chances with a drying trend afterward into
early next week.  Hot and humid conditions will also expand across
the region Friday through Sunday with dangerous heat index values
likely to be felt area wide.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Aug 11, 1:13 AM CDT, 3 hours 17 minutes before

Special Weather Statement
National Weather Service Tulsa OK
113 AM CDT Fri Aug 11 2023

OKZ065-110700-
Okfuskee OK-
113 AM CDT Fri Aug 11 2023

...A strong thunderstorm will impact portions of Okfuskee County
through 200 AM CDT...

At 112 AM CDT, Doppler radar indicated a strong thunderstorm over
Paden, moving east at 30 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

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

Locations in or near the path include...
Okemah...                         Okfuskee...
Boley...                          Weleetka...
Paden...                          Bearden...
Castle...                         Clearview...
Pharoah...                        Mason...

This includes Interstate 40 in Oklahoma between mile markers 212 and
231.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3560 9662 3561 9619 3555 9619 3555 9613
      3542 9608 3538 9609 3538 9607 3529 9604
      3529 9644 3546 9644 3546 9647 3543 9650
      3543 9652 3546 9654 3544 9657 3541 9654
      3539 9654 3541 9658 3540 9662
TIME...MOT...LOC 0612Z 261DEG 27KT 3552 9658

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Special weather statement, Aug 11, 3:48 AM CDT, 42 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
Aug 11, 1:13 AM CDT	Special Weather Statement	TSA	Okfuskee	47 min
Aug 11, 1:19 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee	41 min
Aug 11, 1:35 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	40 min
Aug 11, 1:55 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	37 min
Aug 11, 1:59 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	18 min
Aug 11, 2:06 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	39 min
Aug 11, 2:58 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	47 min
Aug 11, 3:04 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Sequoyah	14 min
Aug 11, 3:32 AM CDT	Excessive Heat Warning	TSA	Choctaw, Craig, Creek, Haskell, Latimer, McIntosh and 12 more	16 hr
Aug 11, 2:35 PM CDT	Excessive Heat Warning	TSA	Choctaw, Creek, Haskell, Latimer, McIntosh, Mayes and 8 more	29 hr
Aug 11, 2:35 PM CDT	Heat Advisory	TSA	Cherokee, Craig, Creek, Delaware, Haskell, Latimer and 13 more	29 hr
Aug 11, 5:37 PM CDT	Special Weather Statement	TSA	Osage	53 min
Aug 11, 6:09 PM CDT	Special Weather Statement	TSA	Osage	51 min
Aug 11, 6:15 PM CDT	Severe Thunderstorm Warning	TSA	Osage	45 min
Aug 11, 6:48 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	Nowata, Osage, Rogers, Washington	57 min
Aug 11, 6:56 PM CDT	Areal Flood Advisory	TSA	Washington	2 hr
Aug 11, 3:48 AM CDT	Special Weather Statement	TSA	Sebastian	42 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2023 Every severe thunderstorm warning in 2023

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.