Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 42, NWS Tulsa, OK

April 9, 2021Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2021, 8:29 PM CDT for Pittsburg County, Oklahoma. It was in force for 46 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, 8:29 PM CDT (01:29 UTC)
Expired: Apr 9, 2021, 9:15 PM CDT
In force: 46 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pittsburg County, OK

The radar

The Norman radar (KTLX), 143 km from the middle of the area, began a volume at 01:32 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, 9:12 PM CDT	HAIL 0.75	1 W Krebs, OK	REPORT FROM MPING: DIME (0.75 IN.).

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, 1.5 hours before the alert went out and 147 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.

661 
WUUS54 KTSA 100129
SVRTSA
OKC121-100215-
/O.NEW.KTSA.SV.W.0042.210410T0129Z-210410T0215Z/

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

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Pittsburg County in southeastern Oklahoma...

* Until 915 PM CDT.

* At 828 PM CDT, a severe thunderstorm was located 4 miles southwest
  of Stuart, moving east at 40 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...
  Mcalester...                      Krebs...
  Kiowa...                          Savanna...
  Ashland...                        Mcalester Regional Airport...
  Haywood...                        Blanco...
  Pittsburg...                      Arpelar...

LAT...LON 3467 9588 3468 9589 3468 9609 3499 9609
      3497 9569 3459 9577 3459 9588
TIME...MOT...LOC 0128Z 288DEG 37KT 3487 9616 

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

1 follow-up statement

181 
WWUS54 KTSA 100206
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
906 PM CDT Fri Apr 9 2021

OKC121-100215-
/O.EXP.KTSA.SV.W.0042.000000T0000Z-210410T0215Z/
Pittsburg OK-
906 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PITTSBURG COUNTY
WILL EXPIRE AT 915 PM CDT...
    
The storms which prompted the warning are moving out of that area.
Therefore the warning will be allowed to expire. However gusty winds 
are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southeastern Oklahoma.

LAT...LON 3467 9588 3468 9589 3468 9609 3499 9609
      3497 9569 3459 9577 3459 9588
TIME...MOT...LOC 0205Z 280DEG 29KT 3493 9575 3470 9586 

$$

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, 7:12 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	48 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, 8:49 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.