Alert archive / Alabama / Mesoscale Discussions in 2005

Mesoscale Discussion 1668

July 6, 200527 counties in Alabama; 7 counties in Florida; 11 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2005, 3:47 AM CDT for 27 counties in Alabama; 7 counties in Florida; 11 counties in Mississippi. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Jul 6, 2005, 3:47 AM CDT (08:47 UTC)
Expired
Jul 6, 2005, 4:45 AM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 45 counties

Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Choctaw 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, Geneva County, AL, Henry County, AL, Houston County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Bay County, FL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jones County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 48 km from the middle of the area, began a volume at 08:47 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, 8.8 hours before the alert went out and 196 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 2005-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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 2005-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.193958Sfc1 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
17 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
893 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 7:47 PM CDTMesoscale DiscussionSPCBaldwin, Covington, Escambia, Geneva, Houston, Mobile118 min
Jul 5, 11:40 PM CDTTornado WatchSPCBaldwin, Mobile5 hr
Jul 6, 4:40 AM CDTTornado WatchSPCBaldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 16 more5 hr
Jul 6, 7:48 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 24 more57 min
Jul 6, 9:14 AM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 16 more61 min
Jul 6, 11:48 AM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Coffee, Conecuh and 15 more87 min
Jul 6, 12:30 PM CDTTornado WatchSPCBarbour, Bullock, Chambers, Coffee, Dale, Elmore and 8 more6 hr
Jul 6, 2:10 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Chambers, Coffee, Dale, Elmore and 8 more65 min
Jul 6, 2:45 PM CDTTornado WatchSPCCalhoun, Cherokee, Clay, Cleburne, Etowah, Randolph and 2 more4 hr
Jul 6, 6:11 PM CDTMesoscale DiscussionSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, Coosa and 8 more34 min
Jul 6, 6:35 PM CDTTornado WatchSPCBullock, Calhoun, Chambers, Cherokee, Clay, Cleburne and 6 more6 hr

Nearby

Mesoscale Discussions in Alabama, 2005Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Florida, 2005Every mesoscale discussion in 2005

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.