Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 66

January 29, 201322 counties in Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2013, 3:28 AM CST for 22 counties in Oklahoma; 6 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jan 29, 2013, 3:28 AM CST (09:28 UTC)
Expired
Jan 29, 2013, 5:00 AM CST
In force
92 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 28 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Oklahoma County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 91 km from the middle of the area, began a volume at 09:29 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

Norman, OK (KOUN), launched 00:00Z, 9.5 hours before the alert went out and 123 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 2013-01-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 686 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 2013-01-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 275 square meters per square second.1939587897Sfc1 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
686 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
935 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
275 m²/s²
0-3 km storm-relative helicity
382 m²/s²
Significant tornado parameter
1.3
Supercell composite
10.3

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
Jan 28, 9:29 PM CSTMesoscale DiscussionSPCCleveland, Creek, Lincoln, Logan, Noble, Oklahoma and 4 more2 hr
Jan 29, 4:57 AM CSTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 27 more7 hr
Jan 29, 7:26 AM CSTTornado WatchSPCAdair, Cherokee, Craig, Delaware, McIntosh, Mayes and 10 more10 hr
Jan 29, 9:46 AM CSTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Choctaw, Coal and 20 more119 min
Jan 29, 10:37 AM CSTMesoscale DiscussionSPCLove53 min
Jan 29, 10:59 AM CSTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Haskell and 13 more8 hr
Jan 29, 11:05 AM CSTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Mayes, Muskogee and 7 more55 min
Jan 29, 1:19 PM CSTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Muskogee, Sequoyah, Wagoner56 min
Jan 29, 2:15 PM CSTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Latimer and 5 more2 hr
Jan 29, 3:31 PM CSTMesoscale DiscussionSPCAdair, Sequoyah89 min
Jan 29, 4:58 PM CSTMesoscale DiscussionSPCMcCurtain92 min
Jan 29, 5:37 PM CSTTornado WatchSPCMcCurtain8 hr
Jan 29, 11:28 AM CSTSevere Thunderstorm WatchSPCBosque, Brown, Callahan, Coleman, Comanche, Concho and 30 more6 hr
Jan 29, 3:46 PM CSTMesoscale DiscussionSPCCoryell, Dallas, Ellis, Hill, McLennan119 min
Jan 29, 5:51 PM CSTMesoscale DiscussionSPCAnderson, Angelina, Brazos, Burleson, Camp, Cass and 25 more114 min

Nearby

Mesoscale Discussions in Oklahoma, 2013Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013

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.