Alert archive / Oklahoma / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 198

May 23, 20168 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2016, 2:15 AM CDT for 8 counties in Oklahoma; 7 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 23, 2016, 2:15 AM CDT (07:15 UTC)
Expired
May 23, 2016, 7:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt

Counties Carter County, OK, Cotton County, OK, Jackson County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Grayson County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 66 km from the middle of the area, began a volume at 07:19 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 23, 2:26 AM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Murray, Stephens49 min
May 23, 2:29 AM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Love, Stephens46 min
May 23, 2:42 AM CDTSevere Thunderstorm WarningOUNJackson, Tillman48 min
May 23, 2:45 AM CDTSevere Thunderstorm WarningFWDMontague60 min
May 23, 3:14 AM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Jefferson, Johnston, Love, Marshall and 2 more46 min
May 23, 3:19 AM CDTSevere Thunderstorm WarningOUNTillman25 min
May 23, 3:58 AM CDTSevere Thunderstorm WarningOUNAtoka, Bryan, Carter, Coal, Johnston, Love and 2 more47 min
May 23, 6:28 AM CDTSevere Thunderstorm WarningFWDJack, Montague, Wise52 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.3 hours before the alert went out and 140 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 2016-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1204 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2016-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 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
1204 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 7:02 PM CDTMesoscale DiscussionSPCBeaver118 min
May 22, 7:46 PM CDTMesoscale DiscussionSPCComanche, Greer, Jackson, Kiowa, Tillman89 min
May 22, 8:48 PM CDTSevere Thunderstorm WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Jefferson and 3 more5 hr
May 22, 9:10 PM CDTMesoscale DiscussionSPCBeaver65 min
May 23, 1:36 AM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Jefferson, Love, Marshall and 2 more84 min
May 23, 4:58 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Jefferson, Love, Marshall and 1 more62 min
May 23, 2:18 PM CDTMesoscale DiscussionSPCBeckham, Dewey, Ellis, Harmon, Harper, Major and 3 more117 min
May 23, 3:37 PM CDTTornado WatchSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 9 more8 hr
May 23, 6:08 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 9 more2 hr
May 22, 9:35 PM CDTMesoscale DiscussionSPCIrion, Reagan85 min
May 23, 1:32 PM CDTMesoscale DiscussionSPCBorden, Coke, Crockett, Crosby, Dawson, Garza and 15 more118 min
May 23, 2:32 PM CDTTornado WatchSPCBorden, Brewster, Briscoe, Childress, Coke, Cottle and 37 more7 hr
May 23, 5:29 PM CDTMesoscale DiscussionSPCBorden, Briscoe, Coke, Cottle, Crockett, Crosby and 30 more91 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2016Severe Thunderstorm Watches in Texas, 2016Every severe thunderstorm watch in 2016

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.