Alert archive / Oklahoma / Mesoscale Discussions in 2022

Mesoscale Discussion 649

May 4, 20227 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 4, 2022, 7:19 PM CDT for 7 counties in Oklahoma. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 4, 2022, 7:19 PM CDT (00:19 UTC)
Expired: May 4, 2022, 8:15 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 176

Counties Cleveland County, OK, McClain County, OK, McIntosh County, OK, Okfuskee County, OK, Okmulgee County, OK, Pottawatomie County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 51 km from the middle of the area, began a volume at 00:18 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 180May 4, 9:35 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 277 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: 2315 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1365 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 12.4

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
May 4, 7:36 PM CDT	Mesoscale Discussion	SPC	Harmon, Tillman	84 min
May 4, 9:13 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Caddo, Carter, Cleveland, Coal and 30 more	92 min
May 4, 9:41 PM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Caddo, Carter, Cherokee and 31 more	6 hr
May 4, 11:33 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Cleveland, Coal, Comanche, Cotton and 27 more	117 min
May 5, 1:42 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 13 more	2 hr
May 5, 10:31 AM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Cleveland, Coal, Creek, Garvin and 27 more	119 min
May 5, 1:18 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Latimer and 4 more	87 min

Nearby

Mesoscale Discussions in Oklahoma, 2022 Every mesoscale discussion in 2022

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.