Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Tulsa, OK

April 9, 2021Creek County, Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 7:12 PM CDT for Creek County, Okfuskee County, Oklahoma. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 9, 2021, 7:12 PM CDT (00:12 UTC)
Expired: Apr 9, 2021, 8:00 PM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Creek County, OK, Okfuskee County, OK

The radar

The Tulsa radar (KINX), 78 km from the middle of the area, began a volume at 00:11 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.

What was reported inside it

Time	Report	Where	Remark
Apr 9, 7:28 PM CDT	HAIL 1	5 Ne Bristow, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 119 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: 1392 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1212 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

690 
WUUS54 KTSA 100012
SVRTSA
OKC037-107-100100-
/O.NEW.KTSA.SV.W.0039.210410T0012Z-210410T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
712 PM CDT Fri Apr 9 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southern Creek County in northeastern Oklahoma...
  Northwestern Okfuskee County in east central Oklahoma...

* Until 800 PM CDT.

* At 712 PM CDT, severe thunderstorms were located along a line
  extending from 5 miles west of Kellyville to 2 miles south of Depew
  to 7 miles west of Welty, moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations in or near the path include...
  Bristow...                        Okfuskee...
  Kiefer...                         Kellyville...
  Depew...                          Slick...
  Welty...                          Milfay...

This includes Interstate 44 between mile markers 183 and 207.
 
LAT...LON 3576 9659 3601 9633 3598 9603 3596 9603
      3585 9614 3585 9619 3559 9622 3557 9662
TIME...MOT...LOC 0012Z 265DEG 20KT 3596 9630 3577 9651 3562 9654 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:02 PM CDT	Special Weather Statement	TSA	Rogers	28 min
Apr 9, 7:09 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	51 min
Apr 9, 7:24 PM CDT	Special Weather Statement	TSA	Tulsa	36 min
Apr 9, 7:29 PM CDT	Special Weather Statement	TSA	Ottawa	31 min
Apr 9, 7:38 PM CDT	Special Weather Statement	TSA	Craig, Nowata	37 min
Apr 9, 7:38 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okmulgee, Rogers, Tulsa, Wagoner	52 min
Apr 9, 7:41 PM CDT	Tornado Warning	TSA	Creek, Tulsa	20 min
Apr 9, 7:52 PM CDT	Special Weather Statement	TSA	Cherokee, Mayes	23 min
Apr 9, 7:56 PM CDT	Special Weather Statement	TSA	Okfuskee	34 min
Apr 9, 8:02 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	29 min
Apr 9, 8:28 PM CDT	Special Weather Statement	TSA	Cherokee, Mayes	32 min
Apr 9, 8:29 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	46 min
Apr 9, 8:49 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	41 min
Apr 9, 8:59 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	50 min
Apr 9, 9:03 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Sequoyah	42 min
Apr 9, 9:24 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	66 min
Apr 9, 9:27 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	48 min
Apr 9, 9:30 PM CDT	Special Weather Statement	TSA	Muskogee	30 min
Apr 9, 9:35 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	55 min
Apr 9, 9:37 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Muskogee, Sequoyah	38 min
Apr 9, 9:58 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, LeFlore, Pushmataha	47 min
Apr 9, 10:24 PM CDT	Special Weather Statement	TSA	LeFlore	36 min
Apr 9, 10:33 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	42 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.