Alert archive / Arkansas / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 414, NWS Tulsa, OK

August 18, 20245 counties in Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 18, 2024, 6:43 PM CDT for 5 counties in Arkansas. It was in force for 47 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 18, 2024, 6:43 PM CDT (23:43 UTC)
Expired: Aug 18, 2024, 7:30 PM CDT
In force: 47 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 49 km from the middle of the area, began a volume at 23:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 18, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.7 hours before the alert went out and 140 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: 709 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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 18, 6:35 PM CDT, 8 minutes earlier.

Area forecast discussion, Aug 18, 6:35 PM CDT, 8 minutes before

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Hazardous weather outlook, Aug 18, 4:56 PM CDT, 1 hour 47 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
456 PM CDT Sun Aug 18 2024

ARZ001-002-010-011-019-020-029-OKZ049-053>076-191015-
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-
456 PM CDT Sun Aug 18 2024

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...Northeast Oklahoma and Northwest and West Central Arkansas.
	ONSET...Ongoing.

DANGEROUS HEAT.
	RISK...Critical.
	AREA...Eastern Oklahoma and Northwest and West Central Arkansas.
	ONSET...Ongoing.

DISCUSSION...
The combination of heat and humidity have lead to dangerously
high heat across the region this afternoon, with many locations
experiencing heat indices in excess of 110 degrees from eastern
Oklahoma into western Arkansas. A boundary currently moving
through northwest Arkansas and far northeast Oklahoma will also
serve as the focus for a few thunderstorms that will be possible
this afternoon and evening. A few storms could be severe, with
damaging wind gusts the primary threat through the evening.
Otherwise, slightly cooler and drier air will follow the boundary
tonight bringing an end to the excessive heat for most of the area
for a few days.

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

.DAYS TWO THROUGH SEVEN...Monday through Saturday.
MONDAY...Thunderstorm Potential...Dangerous Heat Potential.
TUESDAY...Thunderstorm Potential.
WEDNESDAY THROUGH SATURDAY...No Hazards.

EXTENDED DISCUSSION...
Dangerous heat may persist into Monday across far southeast
Oklahoma. Otherwise, relatively cooler temperatures are expected
by early in the work week behind Sunday's cold front and as the
upper ridge shifts westward away from the region.

A low chance of showers and thunderstorms will exist again Monday
night into Tuesday morning. Severe thunderstorms are not
expected.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Aug 18, 5:53 PM CDT, 50 minutes before

Special Weather Statement
National Weather Service Tulsa OK
553 PM CDT Sun Aug 18 2024

ARZ001-010-182330-
Benton AR-Washington AR-
553 PM CDT Sun Aug 18 2024

...A STRONG THUNDERSTORM WILL IMPACT BENTON AND NORTHERN WASHINGTON
COUNTIES THROUGH 630 PM CDT...

At 553 PM CDT, Doppler radar indicated a strong thunderstorm 3 miles
west of Bentonville, moving southeast at 25 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Fayetteville...                   Springdale...
Rogers...                         Bentonville...
Siloam Springs...                 Bella Vista...
Lowell...                         Farmington...
Pea Ridge...                      Gentry...
Tontitown...                      Cave Springs...
Decatur...                        Highfill...
Garfield...                       Springtown...
Northwest Arkansas Regional Air...Hobbs State Park...
War Eagle...                      Miller...

This includes Interstate 49 between mile markers 65 and 93.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northwestern Arkansas.

&&

LAT...LON 3623 9389 3619 9390 3600 9446 3638 9455
      3650 9401 3628 9387 3624 9387
TIME...MOT...LOC 2253Z 323DEG 22KT 3636 9429

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

Special weather statement, Aug 18, 5:58 PM CDT, 45 minutes before

Special Weather Statement
National Weather Service Tulsa OK
558 PM CDT Sun Aug 18 2024

ARZ010-OKZ063-069-182330-
Washington AR-Adair OK-Delaware OK-
558 PM CDT Sun Aug 18 2024

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL WASHINGTON...SOUTH
CENTRAL DELAWARE AND NORTHERN ADAIR COUNTIES THROUGH 630 PM CDT...

At 558 PM CDT, Doppler radar indicated a strong thunderstorm 6 miles
east of Scraper, moving southeast at 25 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Stilwell...                       Lincoln...
Westville...                      Watts...
Adair State Park...               Christie...
Cincinnati...                     Baron...
Maryetta...                       Ballard...
Summers...                        Natural Falls State Park...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northwestern Arkansas.

&&

LAT...LON 3622 9469 3596 9437 3582 9464 3606 9480
      3616 9480 3616 9481
TIME...MOT...LOC 2258Z 323DEG 22KT 3611 9474

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 2:08 PM CDT	Heat Advisory	TSA	Choctaw, Latimer, Pittsburg, Pushmataha	30 hr
Aug 18, 5:58 PM CDT	Special Weather Statement	TSA	Adair	32 min
Aug 18, 5:53 PM CDT	Special Weather Statement	TSA	Benton	37 min
Aug 18, 6:05 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Crawford, Madison, Washington	40 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2024 Every severe thunderstorm warning in 2024

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.