Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

October 24, 2021Osage County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Oct 24, 2021, 6:20 AM CDT for Osage County, Oklahoma. It was in force for 40 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: Oct 24, 2021, 6:20 AM CDT (11:20 UTC)
Expired: Oct 24, 2021, 7:00 AM CDT
In force: 40 min
Issued by: NWS Tulsa, OK
Hail: 0.88 in
Wind: 55

County Osage County, OK

The radar

The Tulsa radar (KINX), 117 km from the middle of the area, began a volume at 11:24 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, 11.3 hours before the alert went out and 266 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: 182 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 349 m²/s²
0-3 km storm-relative helicity: 440 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 Oct 24, 2:46 AM CDT, 3 hours 34 minutes earlier.

Area forecast discussion, Oct 24, 2:46 AM CDT, 3 hours 34 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
246 AM CDT Sun Oct 24 2021

.DISCUSSION...
A small cluster of showers/thunderstorms will begin to move into
portions of northeast Oklahoma early this morning in association
with convergent zone of low level jet. This activity will likely
begin to lift northeast of the area around sunrise.

Strong upper wave, currently moving east of the Four Corners region
will shift east into the central Plains today with a cold front
pushing to near the I-44 corridor by 00Z. It appears that a pre-frontal
trough will likely move into northwest Arkansas by mid to late afternoon
and should be the focus for initial thunderstorm development ahead
of the front. A few of these storms could be severe with large
hail, damaging winds and a brief tornado threat. Additional strong
to severe thunderstorm development will be likely along the main
cold front this evening across portions of southeast Oklahoma and
northwest Arkansas. The stronger low level jet axis will have
shifted east of the area by this time, however moderate
instability, coupled with deep layer shear around 50 knots, will
continue to support a severe threat before thunderstorms shift
east shortly after midnight. A brief tornado or two can also not
be ruled out during this time.

The vigorous storm system impacting northern California today
will rapidly dig ESE across the desert Southwest through the early
part of the work week, impacting the area through the middle part
of the week. Models in general agreement with main upper features,
although GFS is still a little faster with overall system. Regardless,
shower/ thunderstorm chances will begin to increase Tuesday night
into Wednesday with widespread rainfall expected in the 1 to 2
inch range. Lighter wrap around precipitation could linger through
much of the day Thursday with cool/breezy conditions persisting
into Friday as large scale upper low moves across the southeast
CONUS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   82  50  69  52 /  20  10   0   0
FSM   85  54  74  51 /  50  70   0   0
MLC   81  53  74  54 /  10  20   0   0
BVO   81  46  66  47 /  20   0   0   0
FYV   81  46  68  44 /  60  70   0   0
BYV   81  48  65  45 /  60  60   0   0
MKO   79  50  69  52 /  30  30   0   0
MIO   79  45  63  46 /  50  20   0   0
F10   81  50  71  52 /  20  20   0   0
HHW   82  58  78  57 /  10  30   0   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...None.
AR...None.
&&

LONG TERM....12

Hazardous weather outlook, Oct 24, 6:15 AM CDT, 5 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>

In the hours before

Special weather statement, Oct 24, 5:54 AM CDT, 26 minutes before

Special Weather Statement
National Weather Service Tulsa OK
554 AM CDT Sun Oct 24 2021

OKZ054-059-241130-
Osage OK-Pawnee OK-
554 AM CDT Sun Oct 24 2021

...A strong thunderstorm will impact portions of west central Osage
and northwestern Pawnee Counties through 630 AM CDT...

At 553 AM CDT, Doppler radar indicated a strong thunderstorm 4 miles
southwest of Sooner Lake, moving northeast at 50 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel 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 in or near the path include...
Ralston...                        Sooner Lake...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3651 9703 3651 9701 3652 9701 3653 9698
      3653 9696 3655 9692 3655 9690 3657 9689
      3658 9689 3660 9692 3665 9684 3648 9667
      3633 9694 3634 9703
TIME...MOT...LOC 1053Z 234DEG 42KT 3637 9709

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

Special weather statement, Oct 24, 6:20 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
620 AM CDT Sun Oct 24 2021

OKZ054-059-241200-
Osage OK-Pawnee OK-
620 AM CDT Sun Oct 24 2021

...A strong thunderstorm will impact portions of central Osage and
northwestern Pawnee Counties through 700 AM CDT...

At 620 AM CDT, Doppler radar indicated a strong thunderstorm 5 miles
west of Ralston, moving northeast at 45 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel 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 in or near the path include...
Pawhuska...                       Fairfax...
Ralston...                        Burbank...
Pearsonia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3655 9690 3657 9689 3658 9689 3659 9690
      3690 9640 3672 9622 3640 9682 3655 9694
TIME...MOT...LOC 1120Z 234DEG 39KT 3653 9682

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 5:54 AM CDT	Special Weather Statement	TSA	Pawnee	36 min
Oct 24, 7:01 AM CDT	Special Weather Statement	TSA	Osage	44 min
Oct 24, 6:03 PM CDT	Special Weather Statement	TSA	Cherokee	27 min
Oct 24, 6:16 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee	44 min
Oct 24, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	49 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.