Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

August 26, 2021Adair County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 26, 2021, 2:59 PM CDT for Adair County, Oklahoma. It was in force for 31 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: Aug 26, 2021, 2:59 PM CDT (19:59 UTC)
Expired: Aug 26, 2021, 3:30 PM CDT
In force: 31 min
Issued by: NWS Tulsa, OK
Hail: 0.00 in
Wind: 50

County Adair County, OK

The radar

The Western Arkansas radar (KSRX), 90 km from the middle of the area, began a volume at 20:02 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 12:00Z, 8.0 hours before the alert went out and 112 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: 1941 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1150 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

<!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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Aug 26, 11:48 AM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Aug 26, 11:48 AM 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Aug 26, 12:38 PM CDT, 2 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
1238 PM CDT Thu Aug 26 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-271015-
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-
1238 PM CDT Thu Aug 26 2021

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

.DAY ONE...This Afternoon and Tonight.

DANGEROUS HEAT.
	RISK...Elevated.
	AREA...Much of Northeast Oklahoma and also West Central Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Hot and humid conditions will continue into the early evening
across much of the region. Heat index values in the 105 to near 110 degree
range are expected across much of northeast Oklahoma and around
105 degrees over parts of west central Arkansas. A heat advisory is
in effect for these locations from Noon to 7 PM today.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Spotter Activation Not Expected.

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

EXTENDED DISCUSSION...
The hot and humid conditions look to continue into Friday with
slightly cooler conditions forecast for the weekend. Heat index
values of 100 to around 105 degrees will be possible Friday
afternoon across parts of the region. Over the weekend a weak
frontal boundary is forecast to approach the region and stall
across Kansas Sunday into Monday. In response, shower and
thunderstorm chances will become possible across the region.
Additional precipitation may be possible Tuesday into Wednesday
over the eastern portion of the forecast area from a possible
Tropical system.

EMERGENCY MANAGEMENT PLANNING STATEMENT...

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Aug 26, 2:59 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
259 PM CDT Thu Aug 26 2021

ARZ001-010-OKZ063-069-262030-
Benton AR-Washington AR-Adair OK-Delaware OK-
259 PM CDT Thu Aug 26 2021

...Strong thunderstorms will impact portions of southwestern Benton,
west central Washington, southeastern Delaware and northeastern Adair
Counties through 330 PM CDT...

At 259 PM CDT, Doppler radar indicated strong thunderstorms near
West Siloam Springs, 4 miles east of Watts and near Lincoln.
Movement was west at 10 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations in or near the path include...
Siloam Springs...                 Prairie Grove...
Lincoln...                        Westville...
West Siloam Springs...            Watts...
Cincinnati...                     Lake Francis...
Ballard...                        Wedington...
Rhea...                           Canehill...
Summers...                        Natural Falls State Park...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3619 9473 3609 9463 3591 9451 3590 9426
      3611 9441 3621 9455
TIME...MOT...LOC 1959Z 083DEG 9KT 3616 9457 3611 9449 3596 9439

MAX HAIL SIZE...0.00 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 26, 4:35 PM CDT	Special Weather Statement	TSA	Cherokee	25 min

Nearby

Special Weather Statements in Oklahoma, 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.