Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 398

April 16, 20167 counties in Oklahoma; 8 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2016, 6:52 PM CDT for 7 counties in Oklahoma; 8 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Apr 16, 2016, 6:52 PM CDT (23:52 UTC)
Expired
Apr 16, 2016, 8:45 PM CDT
In force
113 min
Issued by
the Storm Prediction Center
Chance of a watch
80%

Counties Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 25 km from the middle of the area, began a volume at 23:54 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 12:00Z, 11.9 hours before the alert went out and 259 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 12:00Z on 2016-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 363 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, Amarillo Airport, TX at 12:00Z on 2016-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 303 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
363 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
538 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
303 m²/s²
0-3 km storm-relative helicity
320 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.9

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
Apr 15, 9:07 PM CDTMesoscale DiscussionSPCCimarron, Texas83 min
Apr 15, 9:53 PM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Texas7 hr
Apr 15, 11:52 PM CDTMesoscale DiscussionSPCBeaver, Texas113 min
Apr 16, 2:22 AM CDTMesoscale DiscussionSPCBeaver, Cimarron, Texas53 min
Apr 16, 1:50 PM CDTMesoscale DiscussionSPCBeaver, Texas85 min
Apr 16, 2:19 PM CDTTornado WatchSPCBeaver, Texas9 hr
Apr 16, 6:14 PM CDTMesoscale DiscussionSPCBeaver, Texas2 hr
Apr 16, 3:53 PM CDTMesoscale DiscussionSPCCoke, Crockett, Fisher, Glasscock, Howard, Irion and 6 more67 min
Apr 16, 4:49 PM CDTTornado WatchSPCBorden, Callahan, Coke, Coleman, Concho, Crane and 25 more7 hr

Nearby

Mesoscale Discussions in Texas, 2016Mesoscale Discussions in Oklahoma, 2016Every mesoscale discussion 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.