Alert archive / Alabama / Mesoscale Discussions in 2019

Mesoscale Discussion 334

April 14, 201916 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; George County, Greene County, Jackson County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2019, 2:15 AM CDT for 16 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; George County, Greene County, Jackson County, Mississippi. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Apr 14, 2019, 2:15 AM CDT (07:15 UTC)
Expired
Apr 14, 2019, 3:15 AM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 22 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, George County, MS, Greene County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 72 km from the middle of the area, began a volume at 07:14 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, 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2019-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1822 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 2019-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 439 square meters per square second.1939587897Sfc1 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
1822 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
439 m²/s²
0-3 km storm-relative helicity
458 m²/s²
Significant tornado parameter
5.5
Supercell composite
21.8

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 13, 7:11 PM CDTTornado WatchSPCBibb, Blount, Colbert, Cullman, Fayette, Franklin and 19 more11 hr
Apr 13, 8:25 PM CDTMesoscale DiscussionSPCChoctaw, Washington95 min
Apr 13, 9:13 PM CDTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Colbert, Cullman and 19 more92 min
Apr 13, 9:33 PM CDTTornado WatchSPCBaldwin, Choctaw, Clarke, Mobile, Monroe, Washington and 1 more8 hr
Apr 13, 11:01 PM CDTMesoscale DiscussionSPCBibb, Choctaw, Clarke, Dallas, Fayette, Franklin and 15 more119 min
Apr 14, 12:39 AM CDTMesoscale DiscussionSPCCalhoun, Cherokee, Clay, Cleburne, DeKalb, Etowah and 2 more66 min
Apr 14, 1:04 AM CDTTornado WatchSPCAutauga, Barbour, Bullock, Calhoun, Chambers, Cherokee and 19 more9 hr
Apr 14, 2:45 AM CDTTornado WatchSPCButler, Coffee, Conecuh, Covington, Crenshaw, Dale and 4 more7 hr
Apr 14, 4:20 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 18 more115 min
Apr 14, 5:36 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 18 more54 min
Apr 14, 7:28 AM CDTMesoscale DiscussionSPCHenry, Houston3 hr
Apr 14, 9:40 AM CDTTornado WatchSPCHenry, Houston6 hr
Apr 14, 10:07 AM CDTMesoscale DiscussionSPCBarbour, Henry, Houston, Russell83 min
Apr 14, 1:07 PM CDTMesoscale DiscussionSPCBaker, Columbia, Dixie, Hamilton, Jefferson, Lafayette and 3 more83 min
Apr 13, 8:31 PM CDTMesoscale DiscussionSPCAdams, Amite, Attala, Carroll, Choctaw, Claiborne and 17 more119 min

Nearby

Mesoscale Discussions in Alabama, 2019Mesoscale Discussions in Florida, 2019Mesoscale Discussions in Mississippi, 2019Every 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.