Alert archive / Oklahoma / Mesoscale Discussions in 2020

Mesoscale Discussion 244

March 28, 202021 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2020, 3:42 AM CDT for 21 counties in Oklahoma; 4 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 28, 2020, 3:42 AM CDT (08:42 UTC)
Expired: Mar 28, 2020, 5:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 25 counties

Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 86 km from the middle of the area, began a volume at 08:43 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, 8.7 hours before the alert went out and 71 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: 626 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 947 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 28, 7:05 AM CDT	Mesoscale Discussion	SPC	Craig, Nowata, Ottawa	85 min
Mar 28, 7:40 AM CDT	Mesoscale Discussion	SPC	Bastrop, Bell, Blanco, Bosque, Burnet, Coryell and 15 more	2 hr
Mar 28, 12:14 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2020 Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.