Alert archive / Oklahoma / Mesoscale Discussions in 2019

Mesoscale Discussion 1127

June 18, 201934 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2019, 8:08 PM CDT for 34 counties in Oklahoma; 7 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 18, 2019, 8:08 PM CDT (01:08 UTC)
Expired
Jun 18, 2019, 10:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 41 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 110 km from the middle of the area, began a volume at 01:11 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

Dodge City, (KDDC), launched 00:00Z, 1.1 hours before the alert went out and 290 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, Dodge City, at 00:00Z on 2019-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 641 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, Dodge City, at 00:00Z on 2019-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.1939Sfc1 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
641 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1335 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.7

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
Jun 18, 8:12 PM CDTMesoscale DiscussionSPCNowata, Osage, Washington93 min
Jun 18, 9:29 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 32 more6 hr
Jun 19, 12:45 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 18 more60 min
Jun 19, 1:25 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Hughes, Johnston and 8 more65 min
Jun 19, 1:43 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 13 more3 hr
Jun 19, 3:08 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Hughes and 7 more67 min
Jun 19, 3:14 PM CDTMesoscale DiscussionSPCBryan, Choctaw, Love, McCurtain, Marshall3 hr
Jun 19, 3:58 PM CDTTornado WatchSPCBryan, Choctaw, Love, McCurtain, Marshall8 hr
Jun 19, 4:36 PM CDTMesoscale DiscussionSPCBeaver, Ellis, Harper, Woodward114 min
Jun 19, 5:51 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 6 more4 hr
Jun 19, 6:10 AM CDTMesoscale DiscussionSPCCherokee, Harrison, Marion, Nacogdoches, Panola, Rusk and 2 more95 min
Jun 19, 4:24 PM CDTMesoscale DiscussionSPCBorden, Coke, Fisher, Howard, Jones, Kent and 6 more36 min
Jun 19, 4:42 PM CDTSevere Thunderstorm WatchSPCBorden, Coke, Concho, Crockett, Fisher, Glasscock and 18 more6 hr
Jun 19, 5:30 PM CDTMesoscale DiscussionSPCHopkins, Hunt60 min

Nearby

Mesoscale Discussions in Oklahoma, 2019Mesoscale Discussions in Texas, 2019Every mesoscale discussion 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.