Alert archive / Alabama / Mesoscale Discussions in 2022

Mesoscale Discussion 18

January 2, 20226 counties in Alabama; 6 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2022, 10:37 AM CST for 6 counties in Alabama; 6 counties in Florida. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jan 2, 2022, 10:37 AM CST (16:37 UTC)
Expired: Jan 2, 2022, 12:00 PM CST
In force: 83 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 42 km from the middle of the area, began a volume at 16:39 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 9Jan 2, 1:15 PM CST

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.6 hours before the alert went out and 183 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: 104 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Jan 1, 6:02 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 19 more	118 min
Jan 1, 6:53 PM CST	Tornado Watch	SPC	Cullman, DeKalb, Franklin, Jackson, Lawrence, Limestone and 3 more	7 hr
Jan 1, 8:30 PM CST	Mesoscale Discussion	SPC	Jackson	60 min
Jan 1, 9:11 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 17 more	64 min
Jan 1, 10:07 PM CST	Tornado Watch	SPC	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more	6 hr
Jan 1, 11:19 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Choctaw and 17 more	116 min
Jan 2, 2:19 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Choctaw and 17 more	116 min
Jan 2, 12:53 PM CST	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	2 hr
Jan 2, 1:17 PM CST	Tornado Watch	SPC	Geneva, Henry, Houston	9 hr
Jan 2, 2:48 PM CST	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Gulf, Jackson, Jefferson and 4 more	117 min
Jan 2, 5:52 PM CST	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more	113 min

Nearby

Mesoscale Discussions in Alabama, 2022 Mesoscale Discussions in Florida, 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.