Alert archive / Alabama / Mesoscale Discussions in 2022

Mesoscale Discussion 404

April 5, 202215 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 8 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2022, 6:27 AM CDT for 15 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 8 counties in Mississippi. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Apr 5, 2022, 6:27 AM CDT (11:27 UTC)
Expired
Apr 5, 2022, 9:00 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
80%
All 26 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Escambia County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Forrest County, MS, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 52 km from the middle of the area, began a volume at 11:28 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.5 hours before the alert went out and 190 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2022-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2022-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
89 J/kg
Mixed-layer CIN
-263 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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.

IssuedProductOfficeCountiesLasted
Apr 5, 6:51 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 27 more8 hr
Apr 5, 8:45 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Bullock, Butler, Choctaw, Clarke and 17 more90 min
Apr 5, 10:45 AM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Coffee, Crenshaw, Dale and 5 more90 min
Apr 5, 12:22 PM CDTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 3 more83 min
Apr 5, 1:05 PM CDTMesoscale DiscussionSPCGeneva55 min
Apr 5, 10:15 AM CDTMesoscale DiscussionSPCGadsden2 hr
Apr 5, 1:28 PM CDTTornado WatchSPCBay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 7 more4 hr
Apr 5, 2:30 PM CDTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Jackson, Jefferson, Leon and 2 more90 min
Apr 5, 3:07 PM CDTMesoscale DiscussionSPCBradford, Clay, Duval, Flagler, Marion, Nassau and 3 more113 min
Apr 5, 5:45 PM CDTMesoscale DiscussionSPCBaker, Columbia, Hamilton, Lafayette, Madison, Nassau and 1 more90 min
Apr 5, 1:47 AM CDTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Covington, Forrest and 27 more2 hr
Apr 5, 3:18 AM CDTTornado WatchSPCAdams, Amite, Attala, Carroll, Choctaw, Claiborne and 44 more8 hr
Apr 5, 10:30 AM CDTMesoscale DiscussionSPCPearl River60 min

Nearby

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