Alert archive / Alabama / Mesoscale Discussions in 2019

Mesoscale Discussion 146

March 3, 20194 states

The Storm Prediction Center issued this mesoscale discussion at Mar 3, 2019, 1:20 PM CST for 4 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Mar 3, 2019, 1:20 PM CST (19:20 UTC)
Expired: Mar 3, 2019, 3:15 PM CST
In force: 115 min
Issued by: the Storm Prediction Center

All 30 counties

Baldwin County, AL, Bullock County, AL, Butler County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Escambia County, AL, Lowndes County, AL, Macon County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Santa Rosa County, FL, Tangipahoa Parish, LA, Washington Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 94 km from the middle of the area, began a volume at 19:22 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, 7.3 hours before the alert went out and 216 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: 684 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 144 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
Mar 3, 9:13 AM CST	Mesoscale Discussion	SPC	Choctaw, Sumter	62 min
Mar 3, 9:59 AM CST	Mesoscale Discussion	SPC	Autauga, Barbour, Bullock, Butler, Chambers, Chilton and 23 more	2 hr
Mar 3, 11:03 AM CST	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 25 more	7 hr
Mar 3, 11:24 AM CST	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	10 hr
Mar 3, 12:02 PM CST	Mesoscale Discussion	SPC	Dale, Geneva, Henry, Houston	58 min
Mar 3, 12:28 PM CST	Mesoscale Discussion	SPC	Lee, Russell	32 min
Mar 3, 1:00 PM CST	Mesoscale Discussion	SPC	Macon, Montgomery	30 min
Mar 3, 2:06 PM CST	Mesoscale Discussion	SPC	Lee, Macon, Russell	54 min
Mar 3, 3:22 PM CST	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	113 min
Mar 3, 5:15 PM CST	Mesoscale Discussion	SPC	Houston	2 hr
Mar 3, 2:35 PM CST	Tornado Watch	SPC	Hamilton, Suwannee	7 hr
Mar 3, 10:35 AM CST	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Orleans and 7 more	25 min

Nearby

Mesoscale Discussions in Alabama, 2019 Mesoscale Discussions in Mississippi, 2019 Mesoscale Discussions in Louisiana, 2019 Every mesoscale discussion in 2019

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.