Alert archive / Oklahoma / Mesoscale Discussions in 2020

Mesoscale Discussion 672

May 22, 202023 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 22, 2020, 4:55 PM CDT for 23 counties in Oklahoma; 10 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 22, 2020, 4:55 PM CDT (21:55 UTC)
Expired
May 22, 2020, 7:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 203
All 33 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Latimer County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Montague County, TX, Red River County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 111 km from the middle of the area, began a volume at 21:57 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.9 hours before the alert went out and 172 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, Fort Worth, TX at 12:00Z on 2020-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 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, Fort Worth, TX at 12:00Z on 2020-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
580 J/kg
Mixed-layer CIN
-430 J/kg
Mixed-layer LCL
1997 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 9:10 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Ellis, Harper, Texas, Woods and 1 more65 min
May 21, 9:49 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beaver, Blaine, Canadian, Dewey, Ellis and 14 more8 hr
May 21, 11:28 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Harper, Woods, Woodward2 hr
May 22, 3:51 AM CDTMesoscale DiscussionSPCBlaine, Canadian, Custer, Dewey, Garfield, Grant and 8 more84 min
May 22, 5:01 AM CDTSevere Thunderstorm WatchSPCAdair, Atoka, Cherokee, Cleveland, Coal, Creek and 21 more6 hr
May 22, 9:15 AM CDTMesoscale DiscussionSPCLeFlore90 min
May 22, 1:27 PM CDTSevere Thunderstorm WatchSPCCarter, Comanche, Cotton, Garvin, Jefferson, Love and 3 more6 hr
May 22, 6:20 PM CDTMesoscale DiscussionSPCCotton, Jefferson, Love115 min
May 21, 8:00 PM CDTMesoscale DiscussionSPCCoke, Concho, Fisher, Haskell, Irion, Jones and 9 more90 min
May 21, 10:25 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, McCulloch, Runnels and 2 more95 min
May 22, 12:55 PM CDTMesoscale DiscussionSPCArcher, Baylor, Foard, Haskell, Jack, Jones and 9 more95 min

Nearby

Mesoscale Discussions in Oklahoma, 2020Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020

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.