Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 2127

October 16, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Oct 16, 2006, 5:07 PM CDT for 4 states. It was in force for 23 min.

The area

The outline as issued.

The facts

Issued
Oct 16, 2006, 5:07 PM CDT (22:07 UTC)
Expired
Oct 16, 2006, 5:30 PM CDT
In force
23 min
Issued by
the Storm Prediction Center
All 29 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Escambia County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Saint Bernard Parish, LA, Clarke County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 54 km from the middle of the area, began a volume at 22:10 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, 10.1 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 12:00Z on 2006-10-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 81 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 2006-10-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 249 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
81 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
761 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
249 m²/s²
0-3 km storm-relative helicity
526 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

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
Oct 16, 5:39 PM CDTTornado WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Dallas, Escambia and 6 more8 hr
Oct 15, 10:57 PM CDTMesoscale DiscussionSPCCalcasieu, Cameron63 min
Oct 15, 11:34 PM CDTTornado WatchSPCAcadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 3 more7 hr
Oct 16, 1:26 AM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, Iberville, Jefferson, Lafourche and 11 more94 min
Oct 16, 2:13 AM CDTTornado WatchSPCAscension, Assumption, Iberville, Jefferson, Lafourche, Orleans and 6 more4 hr
Oct 16, 3:25 AM CDTMesoscale DiscussionSPCAcadia, Allen, Assumption, Beauregard, Calcasieu, Cameron and 12 more95 min
Oct 16, 5:32 AM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Beauregard, Calcasieu and 22 more88 min
Oct 16, 5:58 AM CDTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 32 more5 hr
Oct 16, 7:51 AM CDTMesoscale DiscussionSPCDe Soto, Grant, LaSalle, Natchitoches, Red River, Sabine and 1 more84 min
Oct 16, 10:37 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 27 more9 hr
Oct 16, 12:39 PM CDTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 30 more96 min
Oct 16, 1:56 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 13 more64 min
Oct 16, 2:24 PM CDTTornado WatchSPCAscension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 6 more3 hr
Oct 16, 3:37 PM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 33 more83 min
Oct 16, 6:19 PM CDTMesoscale DiscussionSPCAcadia, Allen, Assumption, Avoyelles, Calcasieu, Cameron and 11 more26 min
Oct 16, 6:44 PM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 9 more7 hr

Nearby

Mesoscale Discussions in Alabama, 2006Mesoscale Discussions in Mississippi, 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.