Alert archive / Mississippi / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 184

May 19, 20168 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 11 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at May 19, 2016, 10:52 PM CDT for 8 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 11 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 19, 2016, 10:52 PM CDT (03:52 UTC)
Expired
May 20, 2016, 4:37 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
65 kt
All 22 counties

Baldwin County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 33 km from the middle of the area, began a volume at 03:55 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
10%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
5%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 19, 11:18 PM CDTSevere Thunderstorm WarningLIXHancock, Pearl River42 min
May 19, 11:43 PM CDTSevere Thunderstorm WarningLIXHarrison47 min
May 19, 11:51 PM CDTSevere Thunderstorm WarningMOBGeorge, Greene, Perry, Stone54 min
May 19, 11:56 PM CDTSevere Thunderstorm WarningLIXHancock, Pearl River19 min
May 20, 12:10 AM CDTSevere Thunderstorm WarningJANForrest, Lamar65 min
May 20, 12:14 AM CDTTornado WarningLIXHarrison16 min
May 20, 12:18 AM CDTSevere Thunderstorm WarningLIXJackson57 min
May 20, 12:31 AM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile74 min
May 20, 12:45 AM CDTSevere Thunderstorm WarningMOBBaldwin, Clarke, Mobile, Washington60 min
May 20, 1:23 AM CDTSevere Thunderstorm WarningMOBBaldwin67 min
May 20, 1:47 AM CDTSevere Thunderstorm WarningMOBBaldwin, Clarke, Conecuh, Escambia, Monroe, Washington58 min
May 20, 2:30 AM CDTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa75 min
May 20, 2:48 AM CDTSevere Thunderstorm WarningMOBConecuh, Escambia, Monroe42 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.9 hours before the alert went out and 132 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 2016-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 2016-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939Sfc1 km3 km6 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2145 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 1:26 AM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Conecuh, Covington, Escambia and 4 more2 hr
May 20, 3:10 AM CDTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston5 hr
May 20, 2:33 PM CDTMesoscale DiscussionSPCBlount, Cullman, Fayette, Franklin, Jefferson, Lamar and 10 more2 hr
May 20, 6:27 AM CDTMesoscale DiscussionSPCFranklin, Gadsden, Jefferson, Leon, Liberty, Madison and 2 more93 min
May 19, 10:22 PM CDTMesoscale DiscussionSPCGeorge, Hancock, Harrison, Jackson, Pearl River, Stone83 min

Nearby

Severe Thunderstorm Watches in Mississippi, 2016Severe Thunderstorm Watches in Alabama, 2016Severe Thunderstorm Watches in Florida, 2016Every severe thunderstorm watch in 2016

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.