Alert archive / Florida / Mesoscale Discussions in 2008

Mesoscale Discussion 2193

August 31, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2008, 7:47 PM CDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Aug 31, 2008, 7:47 PM CDT (00:47 UTC)
Expired
Aug 31, 2008, 9:15 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 24 counties

Baldwin County, AL, Mobile County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Franklin County, FL, Gulf County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Tammany Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 93 km from the middle of the area, began a volume at 00:48 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, 0.8 hours before the alert went out and 169 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 2008-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 838 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 2008-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939Sfc1 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
838 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1135 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

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
Aug 31, 8:49 PM CDTTornado WatchSPCBaldwin, Mobile10 hr
Aug 31, 11:54 PM CDTMesoscale DiscussionSPCBaldwin, Mobile2 hr
Sep 1, 3:51 AM CDTMesoscale DiscussionSPCBaldwin, Mobile114 min
Sep 1, 6:30 AM CDTTornado WatchSPCBaldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more9 hr
Sep 1, 9:49 AM CDTMesoscale DiscussionSPCBaldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more86 min
Sep 1, 3:51 PM CDTTornado WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more8 hr
Sep 1, 6:28 PM CDTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more2 hr

Nearby

Mesoscale Discussions in Florida, 2008Mesoscale Discussions in Louisiana, 2008Mesoscale Discussions in Mississippi, 2008Every mesoscale discussion 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.