Alert archive / Mississippi / Mesoscale Discussions in 2006

Mesoscale Discussion 804

May 9, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 9:47 AM CDT for 4 states. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued
May 9, 2006, 9:47 AM CDT (14:47 UTC)
Expired
May 9, 2006, 11:45 AM CDT
In force
118 min
Issued by
the Storm Prediction Center
All 30 counties

Baldwin County, AL, Escambia County, AL, Mobile County, AL, Washington County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 64 km from the middle of the area, began a volume at 14:50 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 12:00Z, 2.8 hours before the alert went out and 104 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 12:00Z on 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1900 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 12:00Z on 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 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
1900 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.7

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
May 8, 7:42 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 17 more93 min
May 8, 7:56 PM CDTSevere Thunderstorm WatchSPCBaldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more5 hr
May 8, 10:00 PM CDTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
May 9, 10:26 AM CDTSevere Thunderstorm WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more7 hr
May 9, 12:29 PM CDTMesoscale DiscussionSPCLauderdale, Limestone, Madison91 min
May 9, 2:55 PM CDTMesoscale DiscussionSPCColbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 5 more2 hr
May 9, 3:57 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Butler, Chilton, Choctaw, Clarke and 15 more2 hr
May 9, 4:47 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Butler, Chilton, Choctaw and 28 more5 hr
May 9, 6:33 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Choctaw, Clarke and 20 more57 min
May 9, 3:37 AM CDTMesoscale DiscussionSPCCitrus, Hernando, Levy, Pasco113 min
May 9, 12:29 PM CDTSevere Thunderstorm WatchSPCAttala, Carroll, Choctaw, Clarke, Clay, Covington and 22 more8 hr
May 9, 1:33 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Clay and 22 more87 min

Nearby

Mesoscale Discussions in Mississippi, 2006Mesoscale Discussions in Alabama, 2006Mesoscale Discussions in Florida, 2006Every mesoscale discussion in 2006

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.