Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 100, NWS Tulsa, OK

April 19, 2023Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 19, 2023, 7:54 PM CDT for Osage County, Oklahoma. It was in force for 39 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
Apr 19, 2023, 7:54 PM CDT (00:54 UTC)
Expired
Apr 19, 2023, 8:33 PM CDT
In force
39 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Osage County, OK

The radar

The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 00:59 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.

IssuedProductOfficeLasted
Apr 19, 6:40 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 181 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2023-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1620 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2023-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 427 square meters per square second.19395878Sfc1 km3 km6 kmRMLM
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
1620 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1145 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
427 m²/s²
0-3 km storm-relative helicity
523 m²/s²
Significant tornado parameter
4.0
Supercell composite
19.0

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 Apr 19, 6:54 PM CDT, 1 hour earlier.

Area forecast discussion, Apr 19, 6:54 PM CDT, 1 hour before
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Hazardous weather outlook, Apr 19, 5:15 PM CDT, 2 hours 39 minutes before
Hazardous Weather Outlook
National Weather Service Tulsa OK
515 PM CDT Wed Apr 19 2023

ARZ001-002-010-011-019-020-029-OKZ049-053>076-201015-
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-
515 PM CDT Wed Apr 19 2023

...SEVERE THUNDERSTORMS POSSIBLE THIS EVENING INTO THURSDAY ACROSS
   EASTERN OKLAHOMA AND WESTERN ARKANSAS...

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

.DAY ONE...Today and Tonight.
TORNADO.
	RISK...Limited.
	AREA...Eastern Oklahoma.
	ONSET...This Evening.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Eastern Oklahoma.
 ONSET...This Evening.

SIGNIFICANT WINDS.
	RISK...Elevated.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

FIRE WEATHER DANGER.
	RISK...Elevated.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

DISCUSSION...

Scattered severe thunderstorms have developed over central
Oklahoma, and will move northeast. These storms may move into
eastern Oklahoma early this evening, and pose a threat of severe
weather generally south of Highway 412 and west of Highway 75,
with less favorable conditions east of that region limiting the
eastward extent of the threat. The main hazard will be large hail
and damaging wind, however a low-end tornado threat will exist
early this evening.

A cold front will move into northeast Oklahoma just before
sunrise on Thursday, with more storms possible along the frontal
boundary.

Strong and gusty southerly winds will continue through tonight.
Elevated fire weather concerns will continue this evening across
a large portion of eastern Oklahoma and northwest Arkansas.

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

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY...Severe Thunderstorm Potential...High Wind Potential...Heavy Rain Potential.
FRIDAY...No Hazards.
SATURDAY...Very High Fire Weather Potential.
SUNDAY...No Hazards.
MONDAY...Thunderstorm Potential...High Wind Potential.
TUESDAY...Thunderstorm Potential...High Wind Potential...Heavy Rain Potential.

EXTENDED DISCUSSION...
Thunderstorms could be ongoing along the front Thursday morning as
boundary moves into Northeast Oklahoma. The overall trend in storm
intensity should be weakening as the line moves through northeast
Oklahoma, but a few strong to severe storms will be possible, with
large hail and damaging winds the main threat, though a tornado
cannot be ruled out along the leading edge.

As the front moves into southeast Oklahoma and west central Arkansas
Thursday afternoon, new storm development is likely along and ahead
of the front. A highly unstable atmosphere along with strong shear
will support severe storms capable of large to very large hail and
tornadoes, especially with the early more discrete development.
Storms should push south of the region by late afternoon, with some
lingering showers and storms possible behind the front through
Friday as the main storm system is slow to exit the area.

Much cooler weather will follow the cold front for the weekend, with
a freeze possible across northern portions of the forecast area both
Saturday and Sunday morning. More shower and storm chances arrive on
Sunday and last into the middle of next week as a little more active
pattern sets up across the central CONUS.

weather.gov/tulsa contains additional information.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 8:31 PM CDTSpecial Weather StatementTSAOsage14 min
Apr 19, 8:36 PM CDTSpecial Weather StatementTSAPawnee24 min
Apr 19, 9:00 PM CDTSpecial Weather StatementTSAPawnee45 min
Apr 19, 10:27 PM CDTSevere Thunderstorm Warning Considerable damage threatTSACreek, Okfuskee63 min
Apr 19, 10:40 PM CDTSpecial Weather StatementTSAOsage35 min
Apr 19, 10:53 PM CDTSpecial Weather StatementTSACraig37 min
Apr 19, 11:00 PM CDTHigh Wind WarningTSACraig, Nowata, Ottawa, Washington44 min
Apr 19, 11:00 PM CDTWind AdvisoryTSACraig, Nowata, Ottawa, Washington8 hr
Apr 19, 11:18 PM CDTSevere Thunderstorm Warning Considerable damage threatTSAOkfuskee, Okmulgee42 min
Apr 19, 11:51 PM CDTSevere Thunderstorm Warning Considerable damage threatTSAOkfuskee, Okmulgee39 min
Apr 20, 12:20 AM CDTSevere Thunderstorm WarningTSAMuskogee, Okmulgee26 min
Apr 20, 12:24 AM CDTSpecial Weather StatementTSARogers36 min
Apr 20, 12:37 AM CDTSpecial Weather StatementTSATulsa23 min
Apr 20, 12:44 AM CDTSpecial Weather StatementTSAWagoner31 min
Apr 20, 1:09 AM CDTSpecial Weather StatementTSAMayes, Wagoner36 min
Apr 20, 6:39 AM CDTSpecial Weather StatementTSACreek51 min
Apr 20, 7:34 AM CDTSpecial Weather StatementTSACreek26 min
Apr 20, 12:39 PM CDTSpecial Weather StatementTSAPushmataha36 min
Apr 20, 1:09 PM CDTSpecial Weather StatementTSAPushmataha36 min
Apr 20, 1:26 PM CDTSevere Thunderstorm WarningTSALatimer, LeFlore, Pushmataha49 min
Apr 20, 1:56 PM CDTTornado WarningTSAPushmataha49 min
Apr 20, 2:12 PM CDTSpecial Weather StatementTSAChoctaw33 min
Apr 20, 2:19 PM CDTSpecial Weather StatementTSASequoyah26 min
Apr 20, 2:25 PM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah50 min
Apr 20, 2:44 PM CDTSpecial Weather StatementTSAPushmataha46 min
Apr 20, 2:47 PM CDTSevere Thunderstorm WarningTSALeFlore, Pushmataha32 min
Apr 20, 3:26 PM CDTSpecial Weather StatementTSALeFlore49 min
Apr 20, 3:43 PM CDTSpecial Weather StatementTSASequoyah47 min
Apr 20, 5:16 PM CDTSpecial Weather StatementTSAChoctaw29 min
Apr 20, 5:40 PM CDTSpecial Weather StatementTSAPushmataha35 min
Apr 20, 1:31 PM CDTSpecial Weather StatementTSABenton29 min
Apr 20, 1:43 PM CDTSpecial Weather StatementTSAMadison32 min
Apr 20, 1:56 PM CDTSevere Thunderstorm WarningTSACarroll49 min
Apr 20, 2:12 PM CDTSevere Thunderstorm WarningTSABenton, Carroll33 min
Apr 20, 3:06 PM CDTSpecial Weather StatementTSAFranklin24 min
Apr 20, 3:16 PM CDTSpecial Weather StatementTSACrawford29 min
Apr 20, 3:18 PM CDTSevere Thunderstorm WarningTSACarroll27 min
Apr 20, 3:29 PM CDTSpecial Weather StatementTSAFranklin31 min
Apr 20, 3:34 PM CDTSevere Thunderstorm WarningTSACrawford, Franklin, Madison, Washington41 min
Apr 20, 3:52 PM CDTSpecial Weather StatementTSACarroll23 min
Apr 20, 4:10 PM CDTSevere Thunderstorm WarningTSACarroll24 min
Apr 20, 4:20 PM CDTSpecial Weather StatementTSACrawford, Madison25 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2023Every severe thunderstorm warning in 2023

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.