Alert archive / Texas / Mesoscale Discussions in 2010

Mesoscale Discussion 342

April 22, 20108 counties in Oklahoma; 26 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2010, 7:45 PM CDT for 8 counties in Oklahoma; 26 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2010, 7:45 PM CDT (00:45 UTC)
Expired
Apr 22, 2010, 8:45 PM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 34 counties

Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Roger Mills County, OK, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Stonewall County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 122 km from the middle of the area, began a volume at 00:46 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.8 hours before the alert went out and 121 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, Amarillo Airport, TX at 00:00Z on 2010-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Amarillo Airport, TX at 00:00Z on 2010-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1589 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 22, 8:31 PM CDTTornado WatchSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 23 more7 hr
Apr 23, 12:00 AM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 24 more60 min
Apr 23, 2:01 AM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Comanche, Cotton, Garfield and 4 more119 min
Apr 23, 2:50 PM CDTMesoscale DiscussionSPCMcCurtain115 min
Apr 23, 5:41 PM CDTTornado WatchSPCMcCurtain9 hr
Apr 22, 9:17 PM CDTMesoscale DiscussionSPCCoke, Concho, Crane, Crockett, Ector, Edwards and 16 more28 min
Apr 22, 9:32 PM CDTTornado WatchSPCCallahan, Coke, Coleman, Concho, Crane, Crockett and 20 more6 hr
Apr 23, 8:28 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Cherokee, Franklin, Gregg and 18 more62 min
Apr 23, 9:53 AM CDTTornado WatchSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 10 more7 hr
Apr 23, 5:24 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bowie, Brazos, Burleson, Camp and 31 more36 min

Nearby

Mesoscale Discussions in Texas, 2010Mesoscale Discussions in Oklahoma, 2010Every mesoscale discussion in 2010

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.