Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 873

May 30, 201327 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 30, 2013, 3:18 AM CDT for 27 counties in Oklahoma. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 30, 2013, 3:18 AM CDT (08:18 UTC)
Expired
May 30, 2013, 4:45 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 27 counties

Atoka County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Johnston County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Norman radar (KTLX), 14 km from the middle of the area, began a volume at 08:21 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.3 hours before the alert went out and 23 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 2013-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2011 joules per kilogram.LCLEL10008507005003002001001 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 2013-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 324 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
2011 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
324 m²/s²
0-3 km storm-relative helicity
436 m²/s²
Significant tornado parameter
4.8
Supercell composite
23.7

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
May 29, 7:36 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 11 more84 min
May 29, 10:25 PM CDTMesoscale DiscussionSPCAtoka, Canadian, Carter, Cleveland, Coal, Creek and 21 more65 min
May 29, 10:44 PM CDTSevere Thunderstorm WatchSPCAdair, Atoka, Blaine, Bryan, Caddo, Canadian and 48 more7 hr
May 30, 11:44 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Haskell, LeFlore and 8 more91 min
May 30, 12:20 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Carter, Cleveland, Comanche, Cotton and 20 more2 hr
May 30, 12:52 PM CDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Cleveland and 38 more10 hr
May 30, 1:21 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 5 more8 hr
May 30, 2:35 PM CDTMesoscale DiscussionSPCAdair, Atoka, Carter, Cherokee, Choctaw, Cleveland and 38 more55 min
May 30, 5:23 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Haskell, Latimer, LeFlore, McCurtain and 1 more2 hr
May 30, 5:52 PM CDTMesoscale DiscussionSPCAtoka, Carter, Cherokee, Cleveland, Coal, Comanche and 29 more113 min

Nearby

Mesoscale Discussions in Oklahoma, 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.