Alert archive / Mississippi / Tornado Watches in 2006
Tornado Watch 103
The Storm Prediction Center issued this tornado watch at Mar 20, 2006, 3:09 PM CST for 18 counties in Alabama; 12 parishes in Louisiana; 24 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2006, 3:09 PM CST (21:09 UTC)
- Expired
- Mar 20, 2006, 10:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Autauga County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lowndes County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Ascension Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 107 km from the middle of the area, began a volume at 21:11 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.
Warnings issued inside it
32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 3:09 PM CST | Flash Flood Warning | JAN | Jasper, Smith | 3 hr |
| Mar 20, 3:16 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 29 min |
| Mar 20, 3:24 PM CST | Severe Thunderstorm Warning | JAN | Marion | 36 min |
| Mar 20, 3:30 PM CST | Severe Thunderstorm Warning | LIX | Amite, Pike | 45 min |
| Mar 20, 3:30 PM CST | Tornado Warning | MOB | Wayne | 31 min |
| Mar 20, 3:31 PM CST | Tornado Warning | JAN | Clarke | 35 min |
| Mar 20, 3:37 PM CST | Severe Thunderstorm Warning | LIX | Amite, Wilkinson | 23 min |
| Mar 20, 3:44 PM CST | Tornado Warning | JAN | Forrest, Lamar | 46 min |
| Mar 20, 3:45 PM CST | Severe Thunderstorm Warning | JAN | Jones | 45 min |
| Mar 20, 3:52 PM CST | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 38 min |
| Mar 20, 3:55 PM CST | Tornado Warning | JAN | Jones | 31 min |
| Mar 20, 4:01 PM CST | Severe Thunderstorm Warning | JAN | Marion | 29 min |
| Mar 20, 4:03 PM CST | Tornado Warning | LIX | Pike, Walthall | 27 min |
| Mar 20, 4:04 PM CST | Severe Thunderstorm Warning | MOB | Wayne | 41 min |
| Mar 20, 4:14 PM CST | Severe Thunderstorm Warning | LIX | Washington | 31 min |
| Mar 20, 4:21 PM CST | Severe Thunderstorm Warning | MOB | Perry | 39 min |
| Mar 20, 4:28 PM CST | Tornado Warning | LIX | Walthall | 32 min |
| Mar 20, 4:32 PM CST | Tornado Warning | MOB | Perry | 28 min |
| Mar 20, 4:33 PM CST | Tornado Warning | MOB | Choctaw, Washington | 42 min |
| Mar 20, 4:46 PM CST | Tornado Warning | MOB | Greene | 29 min |
| Mar 20, 4:56 PM CST | Tornado Warning | MOB | Clarke | 49 min |
| Mar 20, 4:56 PM CST | Severe Thunderstorm Warning | LIX | Washington | 34 min |
| Mar 20, 5:11 PM CST | Tornado Warning | MOB | Clarke, Washington | 34 min |
| Mar 20, 5:25 PM CST | Tornado Warning | MOB | Wilcox | 26 min |
| Mar 20, 5:43 PM CST | Severe Thunderstorm Warning | MOB | Greene, Perry, Wayne | 40 min |
| Mar 20, 6:06 PM CST | Severe Thunderstorm Warning | MOB | Choctaw, Washington | 24 min |
| Mar 20, 6:09 PM CST | Tornado Warning | BMX | Elmore | 36 min |
| Mar 20, 6:19 PM CST | Tornado Warning | MOB | Washington | 26 min |
| Mar 20, 6:39 PM CST | Tornado Warning | MOB | Clarke, Washington | 51 min |
| Mar 20, 6:57 PM CST | Severe Thunderstorm Warning | BMX | Montgomery | 33 min |
| Mar 20, 7:15 PM CST | Severe Thunderstorm Warning | MOB | Monroe | 45 min |
| Mar 20, 7:38 PM CST | Severe Thunderstorm Warning | MOB | Wilcox | 67 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 12:00Z, 9.2 hours before the alert went out and 116 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 420 m²/s²
- 0-3 km storm-relative helicity
- 432 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 202109
SEL3
SPC WW 202109
ALZ000-LAZ000-MSZ000-210400-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 103
NWS STORM PREDICTION CENTER NORMAN OK
310 PM CST MON MAR 20 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN ALABAMA
SOUTHEAST LOUISIANA
SOUTHERN MISSISSIPPI
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 310 PM UNTIL 1000
PM CST.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 15 MILES NORTH NORTHWEST OF BATON
ROUGE LOUISIANA TO 20 MILES NORTHEAST OF MONTGOMERY ALABAMA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 102...
DISCUSSION...LARGE COMPLEX OF STRONG/SEVERE THUNDERSTORMS WILL TRACK
EASTWARD ACROSS SOUTHERN MS AND SOUTHEAST LA DURING THE NEXT FEW
HOURS...BEFORE MOVING INTO SOUTHERN AL. STORMS ARE PROPAGATING
ALONG SURFACE WARM FRONT. AIR MASS ALONG AND SOUTH OF FRONT IS
MOIST AND MODERATELY UNSTABLE...WITH VERY FAVORABLE VERTICAL SHEAR
PROFILES FOR TORNADIC SUPERCELLS. DAMAGING WINDS AND HAIL WILL ALSO
BE POSSIBLE WITH STRONGEST CELLS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25035.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 5:47 PM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Clarke and 21 more | 118 min |
| Mar 20, 3:36 AM CST | Mesoscale Discussion | SPC | Beauregard, Calcasieu | 24 min |
| Mar 20, 4:21 AM CST | Mesoscale Discussion | SPC | Allen, Avoyelles, Beauregard, Calcasieu, Evangeline, Grant and 6 more | 24 min |
| Mar 20, 4:44 AM CST | Tornado Watch | SPC | Allen, Avoyelles, Beauregard, Evangeline, Rapides, Saint Landry and 1 more | 5 hr |
| Mar 20, 6:36 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Evangeline, Rapides, Vernon | 54 min |
| Mar 20, 9:20 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Concordia and 12 more | 85 min |
| Mar 20, 9:53 AM CST | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula and 19 more | 7 hr |
| Mar 20, 2:12 PM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula and 19 more | 93 min |
Nearby
Tornado Watches in Mississippi, 2006Tornado Watches in Alabama, 2006Tornado Watches in Louisiana, 2006Every tornado watch 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.