Alert archive / Oklahoma / Mesoscale Discussions in 2017

Mesoscale Discussion 333

March 26, 201711 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2017, 1:24 PM CDT for 11 counties in Oklahoma. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Mar 26, 2017, 1:24 PM CDT (18:24 UTC)
Expired: Mar 26, 2017, 2:30 PM CDT
In force: 66 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Canadian County, OK, Cleveland County, OK, Garvin County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 14 km from the middle of the area, began a volume at 18:23 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.

Tornado Watch 86Mar 26, 4:00 PM CDT

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 6.4 hours before the alert went out and 22 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1175 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Mar 26, 2:49 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Atoka, Blaine, Bryan, Canadian, Carter and 34 more	86 min
Mar 26, 4:02 PM CDT	Tornado Watch	SPC	Alfalfa, Atoka, Blaine, Bryan, Canadian, Carter and 36 more	7 hr
Mar 26, 5:13 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Coal, Garvin, Hughes and 10 more	92 min
Mar 26, 6:33 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Major, Noble and 6 more	87 min

Nearby

Mesoscale Discussions in Oklahoma, 2017 Every mesoscale discussion in 2017

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.