Alert archive / Oklahoma / Mesoscale Discussions in 2023

Mesoscale Discussion 152

February 15, 202317 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Feb 15, 2023, 6:53 PM CST for 17 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 15, 2023, 6:53 PM CST (00:53 UTC)
Expired: Feb 15, 2023, 9:00 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 33

Counties Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 138 km from the middle of the area, began a volume at 00:52 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.

Severe Thunderstorm Watch 35Feb 15, 9:45 PM CST

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 135 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: 2138 m above ground
0-6 km bulk shear: 93 kt
0-1 km storm-relative helicity: 342 m²/s²
0-3 km storm-relative helicity: 540 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
Feb 15, 9:21 PM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Haskell and 11 more	54 min
Feb 15, 9:44 PM CST	Severe Thunderstorm Watch	SPC	Adair, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 3 more	7 hr

Nearby

Mesoscale Discussions in Oklahoma, 2023 Every mesoscale discussion in 2023

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.