Alert archive / Alabama / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 78

February 26, 200811 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 4 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Feb 26, 2008, 5:12 AM CST for 11 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida; 4 counties in Mississippi. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Feb 26, 2008, 5:12 AM CST (11:12 UTC)
Expired
Feb 26, 2008, 9:13 AM CST
In force
4 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt

Counties Baldwin County, AL, Butler County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 11:15 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
5%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Feb 26, 5:12 AM CSTSevere Thunderstorm WarningMOBClarke, Wilcox48 min
Feb 26, 5:41 AM CSTSevere Thunderstorm WarningMOBBaldwin, Clarke, Mobile, Monroe, Washington, Wilcox64 min
Feb 26, 6:14 AM CSTSevere Thunderstorm WarningMOBButler, Conecuh, Crenshaw, Monroe, Wilcox61 min
Feb 26, 6:45 AM CSTSevere Thunderstorm WarningMOBBaldwin, Clarke, Escambia, Mobile30 min
Feb 26, 6:45 AM CSTTornado WarningMOBCrenshaw15 min
Feb 26, 7:06 AM CSTSevere Thunderstorm WarningMOBButler, Conecuh, Covington, Crenshaw, Escambia54 min
Feb 26, 7:53 AM CSTSevere Thunderstorm WarningMOBConecuh, Covington, Crenshaw, Escambia40 min
Feb 26, 8:22 AM CSTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa35 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

Jackson, MS (KJAN), launched 00:00Z, 11.2 hours before the alert went out and 235 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, Jackson, MS at 00:00Z on 2008-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Jackson, MS at 00:00Z on 2008-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1551 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
359 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 25, 11:20 PM CSTMesoscale DiscussionSPCBibb, Choctaw, Clarke, Fayette, Greene, Hale and 7 more85 min
Feb 26, 12:10 AM CSTSevere Thunderstorm WatchSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Fayette and 12 more7 hr
Feb 26, 2:50 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Fayette and 12 more85 min
Feb 26, 4:41 AM CSTSevere Thunderstorm WatchSPCBarbour, Bullock, Chambers, Clay, Cleburne, Coosa and 8 more7 hr
Feb 26, 6:50 AM CSTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 1 more85 min
Feb 26, 7:39 AM CSTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston6 hr
Feb 26, 9:22 AM CSTMesoscale DiscussionSPCHouston83 min
Feb 26, 9:35 AM CSTMesoscale DiscussionSPCHouston85 min
Feb 26, 10:00 AM CSTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 18 more9 hr
Feb 26, 1:02 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 20 more88 min
Feb 26, 1:41 PM CSTMesoscale DiscussionSPCBrevard, Broward, Charlotte, Citrus, DeSoto, Glades and 22 more94 min
Feb 26, 2:41 PM CSTTornado WatchSPCBrevard, Citrus, DeSoto, Hardee, Hernando, Highlands and 14 more5 hr
Feb 25, 7:20 PM CSTSevere Thunderstorm WatchSPCBolivar, Carroll, Coahoma, Grenada, Holmes, Humphreys and 14 more7 hr
Feb 25, 9:22 PM CSTMesoscale DiscussionSPCBolivar, Coahoma, Humphreys, Issaquena, Sharkey, Sunflower and 1 more83 min

Nearby

Severe Thunderstorm Watches in Alabama, 2008Severe Thunderstorm Watches in Mississippi, 2008Severe Thunderstorm Watches in Florida, 2008Every severe thunderstorm watch in 2008

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.