Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 370, NWS Tulsa, OK

October 21, 2019Latimer County, LeFlore County, Pushmataha County, Oklahoma; Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Oct 21, 2019, 12:42 AM CDT for Latimer County, LeFlore County, Pushmataha County, Oklahoma; Sebastian County, Arkansas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 21, 2019, 12:42 AM CDT (05:42 UTC)
Expired: Oct 21, 2019, 1:30 AM CDT
In force: 48 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Sebastian County, AR, Latimer County, OK, LeFlore County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 69 km from the middle of the area, began a volume at 05:43 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 watch it was issued in

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

Issued	Product	Office	Lasted
Oct 20, 8:27 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.7 hours before the alert went out and 231 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: 760 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1785 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 425 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Oct 21, 12:09 AM CDT, 33 minutes earlier.

Area forecast discussion, Oct 21, 12:09 AM CDT, 33 minutes before

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Hazardous weather outlook, Oct 20, 10:08 PM CDT, 2 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
1008 PM CDT Sun Oct 20 2019

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211045-
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-
1008 PM CDT Sun Oct 20 2019

...SEVERE STORMS ONGOING THIS EVENING...
...A FEW STRONG TORNADOES POSSIBLE TONIGHT MAINLY SOUTH OF I-40...

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

.DAY ONE...Tonight.

TORNADO.
	RISK...Elevated.
	AREA...Mainly southeast of I-44...greatest threat along and south
		   of I-40.
	ONSET...Ongoing.

SEVERE THUNDERSTORM.
	RISK...Critical.
	AREA...Much of Eastern Oklahoma and all of Western Arkansas.
	ONSET...Ongoing.

	AREA AT GREATEST RISK...Along and southeast of I-44.

FLASH FLOOD.
	RISK...Elevated.
	AREA...Along and southeast of I-44.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Limited.
	AREA...Along and southeast of I-44.
	ONSET...Ongoing.

DISCUSSION...

Clusters of strong to severe thunderstorms will continue across
northeast this evening with the threat for large hail to golf balls
and very heavy rain.  Additional severe thunderstorm development is
expected across all of eastern Oklahoma and northwest Arkansas
overnight ahead of a strong cold front with the potential for very
large hail, damaging winds and localized flash flooding. Very strong
wind fields ahead of the front will support the potential for a few
strong tornadoes, mainly south of I-40.  The severe threat is
expected to shift east of the region late tonight.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Expected.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.
MONDAY and TUESDAY...No Hazards.
WEDNESDAY...Thunderstorm Potential...Hind Potential.
THURSDAY...Thunderstorm Potential.
FRIDAY and SATURDAY...No Hazards.

EXTENDED DISCUSSION...

The next storm system and cold front will bring a chance for
storms Wednesday night into Thursday. Instability will be lacking
with this system, thus the coverage and intensity of storms will
be low.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Oct 21, 12:23 AM CDT, 19 minutes before

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Special weather statement, Oct 21, 12:30 AM CDT, 12 minutes before

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Local storm report, Oct 21, 12:33 AM CDT, 9 minutes before

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Special weather statement, Oct 21, 12:34 AM CDT, 8 minutes before

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Local storm report, Oct 21, 12:35 AM CDT, 7 minutes before

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Local storm report, Oct 21, 12:38 AM CDT, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 20, 8:16 PM CDT	Special Weather Statement	TSA	Creek	29 min
Oct 20, 8:18 PM CDT	Special Weather Statement	TSA	Creek	27 min
Oct 20, 8:20 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	18 min
Oct 20, 8:36 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Rogers, Tulsa, Wagoner	15 min
Oct 20, 8:43 PM CDT	Special Weather Statement	TSA	Pawnee	32 min
Oct 20, 8:50 PM CDT	Special Weather Statement	TSA	Tulsa	25 min
Oct 20, 8:53 PM CDT	Special Weather Statement	TSA	Tulsa	37 min
Oct 20, 8:54 PM CDT	Special Weather Statement	TSA	Okfuskee	36 min
Oct 20, 9:00 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	45 min
Oct 20, 9:10 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	35 min
Oct 20, 9:12 PM CDT	Special Weather Statement	TSA	Osage, Pawnee	33 min
Oct 20, 9:14 PM CDT	Special Weather Statement	TSA	Wagoner	31 min
Oct 20, 9:15 PM CDT	Special Weather Statement	TSA	Osage	45 min
Oct 20, 9:22 PM CDT	Special Weather Statement	TSA	Nowata, Washington	38 min
Oct 20, 9:25 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	35 min
Oct 20, 9:28 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	47 min
Oct 20, 9:33 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Washington	42 min
Oct 20, 9:37 PM CDT	Special Weather Statement	TSA	Tulsa	23 min
Oct 20, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Rogers, Tulsa, Washington	34 min
Oct 20, 9:45 PM CDT	Special Weather Statement	TSA	Pawnee	30 min
Oct 20, 9:46 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee, Tulsa	44 min
Oct 20, 9:48 PM CDT	Areal Flood Advisory	TSA	Creek, Nowata, Osage, Pawnee, Rogers, Tulsa and 1 more	3 hr
Oct 20, 9:59 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Ottawa	27 min
Oct 20, 10:13 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers, Tulsa, Washington	47 min
Oct 20, 10:14 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Tulsa, Wagoner	29 min
Oct 20, 10:16 PM CDT	Special Weather Statement	TSA	Creek, Tulsa	29 min
Oct 20, 10:21 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa, Washington	24 min
Oct 20, 10:23 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Tulsa	37 min
Oct 20, 10:26 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee, Pittsburg	49 min
Oct 20, 10:34 PM CDT	Special Weather Statement	TSA	Ottawa	26 min
Oct 20, 10:38 PM CDT	Areal Flood Advisory	TSA	Cherokee, Creek, Mayes, Muskogee, Okfuskee, Okmulgee and 3 more	3 hr
Oct 20, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Okmulgee, Rogers, Tulsa, Wagoner	16 min
Oct 20, 10:58 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	47 min
Oct 20, 11:00 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Okfuskee, Okmulgee, Pittsburg	45 min
Oct 20, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Wagoner	31 min
Oct 20, 11:29 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Sequoyah and 1 more	46 min
Oct 20, 11:34 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes	41 min
Oct 20, 11:41 PM CDT	Tornado Warning	TSA	Adair, Cherokee, Delaware	16 min
Oct 20, 11:59 PM CDT	Tornado Warning	TSA	Adair	31 min
Oct 21, 12:02 AM CDT	Tornado Warning	TSA	Adair, Delaware	28 min
Oct 21, 12:04 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Haskell, Sequoyah	41 min
Oct 21, 12:07 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg, Pushmataha	53 min
Oct 21, 12:11 AM CDT	Special Weather Statement	TSA	Haskell	34 min
Oct 21, 12:30 AM CDT	Special Weather Statement	TSA	Choctaw	30 min
Oct 21, 12:34 AM CDT	Special Weather Statement	TSA	Haskell, Latimer	26 min
Oct 21, 12:41 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	49 min
Oct 21, 12:49 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw	41 min
Oct 21, 1:27 AM CDT	Special Weather Statement	TSA	McCurtain	33 min
Oct 21, 12:25 AM CDT	Tornado Warning	TSA	Benton, Carroll	35 min
Oct 21, 12:30 AM CDT	Tornado Warning	TSA	Benton	30 min
Oct 21, 1:06 AM CDT	Special Weather Statement	TSA	Sebastian	24 min
Oct 21, 1:25 AM CDT	Severe Thunderstorm Warning	TSA	Carroll, Crawford, Franklin, Madison, Sebastian	21 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019 Severe Thunderstorm Warnings in Arkansas, 2019 Every severe thunderstorm warning in 2019

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.