Alert archive / Alabama / Mesoscale Discussions in 2023

Mesoscale Discussion 445

April 3, 20239 counties in Alabama; Clarke County, Jones County, Wayne County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2023, 7:22 AM CDT for 9 counties in Alabama; Clarke County, Jones County, Wayne County, Mississippi. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2023, 7:22 AM CDT (12:22 UTC)
Expired: Apr 3, 2023, 8:45 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 112

Counties Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Clarke County, MS, Jones County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 104 km from the middle of the area, began a volume at 12:25 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

Birmingham, AL (KBMX), launched 12:00Z, 0.4 hours before the alert went out and 213 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: 815 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 371 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
Apr 2, 10:19 PM CDT	Mesoscale Discussion	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Apr 3, 1:03 AM CDT	Mesoscale Discussion	SPC	Baldwin, Mobile	117 min
Apr 3, 4:57 AM CDT	Tornado Watch	SPC	Baldwin, Choctaw, Clarke, Conecuh, Covington, Escambia and 3 more	6 hr
Apr 3, 9:28 AM CDT	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	2 hr
Apr 3, 9:51 AM CDT	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	6 hr
Apr 3, 11:59 AM CDT	Mesoscale Discussion	SPC	Houston	61 min
Apr 3, 5:21 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Butler, Chilton, Coffee, Crenshaw and 11 more	114 min

Nearby

Mesoscale Discussions in Alabama, 2023 Mesoscale Discussions in Mississippi, 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.