Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Little Rock, AR

April 24, 2021Polk County, Arkansas

NWS Little Rock, AR issued this special weather statement at Apr 24, 2021, 1:21 AM CDT for Polk County, Arkansas. It was in force for 24 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 24, 2021, 1:21 AM CDT (06:21 UTC)
Expired: Apr 24, 2021, 1:45 AM CDT
In force: 24 min
Issued by: NWS Little Rock, AR

County Polk County, AR

The radar

The Western Arkansas radar (KSRX), 95 km from the middle of the area, began a volume at 06:22 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, 6.4 hours before the alert went out and 277 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: 1023 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

508 
WWUS84 KLZK 240621
SPSLZK

Special Weather Statement
National Weather Service Little Rock AR
121 AM CDT Sat Apr 24 2021
 
ARZ037-040-240645-
Polk AR-Scott AR-
121 AM CDT Sat Apr 24 2021

...SIGNIFICANT WEATHER ADVISORY FOR POLK AND SOUTHWESTERN SCOTT
COUNTIES UNTIL 145 AM CDT...

At 121 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Muse to 8 miles south of Octavia to 13
miles west of Vandervoort to 12 miles west of Grannis to 10 miles
west of Horatio. Movement was east at 40 mph.

Pea size hail and wind gusts up to 50 mph will be possible with these
storms.

Locations impacted include...
Mena...                           Wickes...
Grannis...                        Hatfield...
Vandervoort...                    Cossatot River State Park...
Mountain Fork...                  Polk County Fairgrounds...
Mena Intermountain Airport...     Mccauley...
Shady...                          Hartley...
Caney Creek Wilderness...         Queen Wilhelmina State Park...
Cove...                           Acorn...
Hatton...                         Potter...
Dallas...                         Shady Grove...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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 3473 9445 3479 9423 3453 9416 3448 9409
      3438 9405 3435 9405 3436 9425 3427 9426
      3427 9425 3419 9425 3419 9447
TIME...MOT...LOC 0621Z 253DEG 34KT 3464 9472 3441 9467 3436 9460 3426
9455 3399 9453

$$

62

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 24, 1:43 AM CDT	Special Weather Statement	LZK	Polk	32 min
Apr 24, 1:58 AM CDT	Special Weather Statement	LZK	Pike	32 min
Apr 24, 2:28 AM CDT	Special Weather Statement	LZK	Clark, Pike	32 min
Apr 24, 2:57 AM CDT	Special Weather Statement	LZK	Calhoun, Clark, Dallas, Hot Spring, Ouachita	33 min
Apr 24, 3:26 AM CDT	Special Weather Statement	LZK	Bradley, Calhoun, Dallas	34 min
Apr 24, 3:55 AM CDT	Special Weather Statement	LZK	Bradley, Cleveland, Drew, Lincoln	35 min
Apr 24, 4:28 AM CDT	Special Weather Statement	LZK	Desha, Drew	47 min
Apr 24, 10:14 AM CDT	River Flood Warning	LZK	Bradley, Calhoun, Union	60 days
Apr 24, 10:14 AM CDT	River Flood Warning	LZK	Calhoun, Ouachita	4 days

Nearby

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.