Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 62

January 28, 201310 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jan 28, 2013, 9:29 PM CST for 10 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jan 28, 2013, 9:29 PM CST (03:29 UTC)
Expired: Jan 28, 2013, 11:30 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Cleveland County, OK, Creek County, OK, Lincoln County, OK, Logan County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 85 km from the middle of the area, began a volume at 03:30 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, 3.5 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

Issued	Product	Office	Counties	Lasted
Jan 29, 3:28 AM CST	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more	92 min
Jan 29, 4:57 AM CST	Tornado Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 27 more	7 hr
Jan 29, 7:26 AM CST	Tornado Watch	SPC	Adair, Cherokee, Craig, Delaware, McIntosh, Mayes and 10 more	10 hr
Jan 29, 9:46 AM CST	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Carter, Choctaw, Coal and 20 more	119 min
Jan 29, 10:37 AM CST	Mesoscale Discussion	SPC	Love	53 min
Jan 29, 10:59 AM CST	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Haskell and 13 more	8 hr
Jan 29, 11:05 AM CST	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 7 more	55 min
Jan 29, 1:19 PM CST	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Muskogee, Sequoyah, Wagoner	56 min
Jan 29, 2:15 PM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Latimer and 5 more	2 hr
Jan 29, 3:31 PM CST	Mesoscale Discussion	SPC	Adair, Sequoyah	89 min
Jan 29, 4:58 PM CST	Mesoscale Discussion	SPC	McCurtain	92 min
Jan 29, 5:37 PM CST	Tornado Watch	SPC	McCurtain	8 hr

Nearby

Mesoscale Discussions in Oklahoma, 2013 Every 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.