Alert archive / Oklahoma / Special Weather Statements in 2020

Special Weather Statement, NWS Shreveport, LA

May 23, 2020McCurtain County, Oklahoma

NWS Shreveport, LA issued this special weather statement at May 23, 2020, 12:21 AM CDT for McCurtain County, Oklahoma. It was in force for 54 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 23, 2020, 12:21 AM CDT (05:21 UTC)
Expired: May 23, 2020, 1:15 AM CDT
In force: 54 min
Issued by: NWS Shreveport, LA

County McCurtain County, OK

The radar

The Western Arkansas radar (KSRX), 118 km from the middle of the area, began a volume at 05:26 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

Norman, OK (KOUN), launched 00:00Z, 5.4 hours before the alert went out and 260 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: 3106 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.5

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 May 22, 9:10 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, May 22, 9:10 PM CDT, 3 hours 11 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, May 22, 7:29 PM CDT, 4 hours 52 minutes before

Special Weather Statement
National Weather Service Shreveport LA
729 PM CDT Fri May 22 2020

TXZ124-136-230115-
Smith TX-Wood TX-
729 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SMITH AND
SOUTHWESTERN WOOD COUNTIES UNTIL 815 PM CDT...

At 729 PM CDT, Doppler radar was tracking a strong thunderstorm near
Van, or 15 miles southwest of Mineola, moving north at 30 mph.

Penny size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Mineola, Hainesville, Hoard, Golden, Alba and Carroll.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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

This storm 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 3274 9533 3240 9550 3245 9555 3248 9559
      3269 9559 3272 9564 3282 9565
TIME...MOT...LOC 0029Z 197DEG 25KT 3246 9560

19

Special weather statement, May 22, 11:48 PM CDT, 33 minutes before

Special Weather Statement
National Weather Service Shreveport LA
1148 PM CDT Fri May 22 2020

OKZ077-TXZ096-230545-
McCurtain OK-Red River TX-
1148 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MCCURTAIN AND NORTH
CENTRAL RED RIVER COUNTIES UNTIL 1245 AM CDT...

At 1148 PM CDT, Doppler radar was tracking a strong thunderstorm over
Raymond Gary State Park, or 15 miles east of Hugo, moving east at 30
mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Idabel, Broken Bow, Wright City, Valliant, Millerton, Garvin, Farmers
Hill, Rufe, Redland, Holly Creek, Glover, Slim, Oak Hill and Golden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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

This storm 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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
southeastern Oklahoma.

LAT...LON 3421 9475 3393 9469 3387 9521 3396 9523
      3396 9521 3394 9516 3416 9515
TIME...MOT...LOC 0448Z 260DEG 26KT 3401 9524

19

Special weather statement, May 23, 12:21 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Shreveport LA
1221 AM CDT Sat May 23 2020

OKZ077-230615-
McCurtain OK-
1221 AM CDT Sat May 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MCCURTAIN COUNTY UNTIL
115 AM CDT...

At 1221 AM CDT, Doppler radar was tracking a strong thunderstorm 17
miles northwest of Broken Bow, or 35 miles northeast of Hugo, moving
northeast at 25 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Mount Herman, Sherwood and Bethel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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

This storm 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.

&&

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
southeastern Oklahoma.

LAT...LON 3426 9453 3415 9502 3429 9505 3431 9504
      3445 9460
TIME...MOT...LOC 0521Z 244DEG 20KT 3421 9494

19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:29 PM CDT	Special Weather Statement	SHV	Wood	46 min
May 22, 11:56 PM CDT	Severe Thunderstorm Warning	SHV	Red River	64 min
May 23, 2:19 AM CDT	Severe Thunderstorm Warning	SHV	Red River	56 min
May 23, 2:51 AM CDT	Special Weather Statement	SHV	Camp, Franklin, Red River, Titus	39 min
May 23, 3:37 AM CDT	Special Weather Statement	SHV	Bowie, Camp, Cass, Morris	38 min
May 23, 4:12 AM CDT	Special Weather Statement	SHV	Bowie, Camp, Cass, Morris	48 min
May 23, 5:02 AM CDT	Special Weather Statement	SHV	Marion	43 min
May 23, 5:10 AM CDT	Special Weather Statement	SHV	Camp, Gregg, Smith, Upshur, Wood	50 min
May 23, 5:55 AM CDT	Special Weather Statement	SHV	Gregg, Marion, Morris, Smith, Upshur	50 min
May 23, 6:59 AM CDT	Special Weather Statement	SHV	Cherokee, Harrison, Panola, Rusk	46 min
May 23, 4:56 AM CDT	Special Weather Statement	SHV	Claiborne, Union	34 min
May 23, 7:13 AM CDT	Special Weather Statement	SHV	Bossier, Claiborne, Webster	47 min
May 23, 12:46 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	59 min
May 23, 1:44 AM CDT	Special Weather Statement	SHV	Howard	46 min
May 23, 3:10 AM CDT	Special Weather Statement	SHV	Sevier	65 min
May 23, 3:18 AM CDT	Special Weather Statement	SHV	Howard	27 min
May 23, 3:53 AM CDT	Special Weather Statement	SHV	Howard, Sevier	52 min
May 23, 4:41 AM CDT	Areal Flood Advisory	SHV	Hempstead, Howard	3 hr
May 23, 5:44 AM CDT	Special Weather Statement	SHV	Columbia, Lafayette, Nevada	46 min
May 22, 11:48 PM CDT	Special Weather Statement	SHV	McCurtain	57 min
May 23, 1:57 AM CDT	Special Weather Statement	SHV	McCurtain	63 min
May 23, 3:15 AM CDT	Special Weather Statement	SHV	McCurtain	30 min

Nearby

Special Weather Statements in Oklahoma, 2020 Every special weather statement in 2020

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.