Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 335

March 20, 200619 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2006, 4:58 PM CST for 19 counties in Oklahoma. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Mar 20, 2006, 4:58 PM CST (22:58 UTC)
Expired: Mar 20, 2006, 6:30 PM CST
In force: 92 min
Issued by: the Storm Prediction Center

Counties Blaine County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Johnston County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 34 km from the middle of the area, began a volume at 22:58 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 12:00Z, 11.0 hours before the alert went out and 18 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: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 414 m²/s²
0-3 km storm-relative helicity: 578 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Mar 20, 12:47 PM CST	Mesoscale Discussion	SPC	Beckham, Caddo, Carter, Comanche, Cotton, Garvin and 10 more	88 min
Mar 20, 4:25 PM CST	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 10 more	5 hr

Nearby

Mesoscale Discussions in Oklahoma, 2006 Every mesoscale discussion in 2006

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.