Alert archive / Oklahoma / Special Weather Statements in 2023

Special Weather Statement, NWS Shreveport, LA

April 20, 2023McCurtain County, Oklahoma

NWS Shreveport, LA issued this special weather statement at Apr 20, 2023, 10:21 PM CDT for McCurtain County, Oklahoma. It was in force for 39 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 20, 2023, 10:21 PM CDT (03:21 UTC)
Expired: Apr 20, 2023, 11:00 PM CDT
In force: 39 min
Issued by: NWS Shreveport, LA
Hail: 0.50 in
Wind: 40

County McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 124 km from the middle of the area, began a volume at 03:21 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

Fort Worth, TX (KFWD), launched 00:00Z, 3.4 hours before the alert went out and 296 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: 1791 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

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 Shreveport, LA wrote its last area forecast discussion before this special weather statement went out at Apr 20, 6:55 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Apr 20, 6:55 PM CDT, 3 hours 26 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Apr 20, 12:46 PM CDT, 9 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
1246 PM CDT Thu Apr 20 2023

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-211800-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-
Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass-
Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-
Nacogdoches-Shelby-Angelina-San Augustine-
1246 PM CDT Thu Apr 20 2023

This Hazardous Weather Outlook is for south central Arkansas,
southwest Arkansas, north central Louisiana, northwest Louisiana,
southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...This afternoon and tonight.

Strong to severe thunderstorms will begin to develop this afternoon
across much of the Four-State region and become more widespread this
evening into the overnight hours. Some of these storms could produce
large hail and damaging thunderstorm wind gusts. While conditions are
not conducive for a widespread tornado outbreak, isolated tornadoes
cannot be ruled out. In addition to the severe weather threat will be
an excessive heavy rainfall threat this afternoon through overnight
across much of the region. That excessive heavy rainfall threat will
shift farther south and east into more of North Central and Northeast
Louisiana the first half of Friday. Low-lying and poor drainage flood
prone areas will be the most susceptible to flash flooding late today
through tonight and into early Friday.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

While showers and thunderstorms will be possible across portions of
the Four-State Region next week, atmospheric instability does not
appear significant enough or the development of strong to severe
thunderstorms at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will most likely be needed this afternoon into the
evening and overnight hours for the threat of severe thunderstorms.

19

In the hours before

Local storm report, Apr 20, 4:47 PM CDT, 5 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
447 PM CDT THU APR 20 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0442 PM     HAIL             HAWORTH                 33.85N 94.65W
04/20/2023  E0.88 INCH       MCCURTAIN          OK   PUBLIC

            DIME TO NICKEL SIZE HAIL FELL AT THE COUNTRY
            STORE CONVENIENCE STORE IN HAWORTH.

&&

15

Special weather statement, Apr 20, 5:28 PM CDT, 4 hours 53 minutes before

Special Weather Statement
National Weather Service Shreveport LA
528 PM CDT Thu Apr 20 2023

ARZ050-059-202315-
Sevier AR-Little River AR-
528 PM CDT Thu Apr 20 2023

...A strong thunderstorm will impact portions of northwestern Little
River and central Sevier Counties through 615 PM CDT...

At 527 PM CDT, Doppler radar was tracking a strong thunderstorm near
Horatio, moving northeast at 25 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
De Queen, Horatio, Lockesburg, Geneva and West Otis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southwestern Arkansas.

&&

LAT...LON 3417 9422 3399 9408 3380 9447 3381 9448
      3397 9447
TIME...MOT...LOC 2227Z 234DEG 20KT 3390 9446

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

44

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 7:15 PM CDT	Special Weather Statement	SHV	Titus	30 min
Apr 20, 7:15 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Smith, Upshur	60 min
Apr 20, 7:20 PM CDT	Special Weather Statement	SHV	Smith	40 min
Apr 20, 7:23 PM CDT	Flash Flood Warning	SHV	Smith	3 hr
Apr 20, 7:25 PM CDT	Flash Flood Warning	SHV	Bowie, Franklin, Morris, Red River, Titus	3 hr
Apr 20, 7:26 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	49 min
Apr 20, 7:26 PM CDT	Tornado Warning	SHV	Gregg, Smith, Upshur	49 min
Apr 20, 8:03 PM CDT	Special Weather Statement	SHV	Smith	57 min
Apr 20, 8:09 PM CDT	Flash Flood Warning	SHV	Bowie	3 hr
Apr 20, 8:11 PM CDT	Severe Thunderstorm Warning	SHV	Cass	49 min
Apr 20, 8:13 PM CDT	Special Weather Statement	SHV	Upshur	62 min
Apr 20, 8:19 PM CDT	Special Weather Statement	SHV	San Augustine	56 min
Apr 21, 11:27 AM CDT	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	24 hr
Apr 21, 11:35 AM CDT	River Flood Warning	SHV	Angelina, Cherokee, Nacogdoches	24 hr
Apr 20, 9:37 PM CDT	Special Weather Statement	SHV	Sabine	68 min
Apr 20, 8:54 PM CDT	Special Weather Statement	SHV	Columbia, Lafayette	51 min
Apr 20, 9:37 PM CDT	Special Weather Statement	SHV	Columbia, Union	53 min
Apr 20, 9:40 PM CDT	Special Weather Statement	SHV	McCurtain	65 min

Nearby

Special Weather Statements in Oklahoma, 2023 Every special weather statement 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.