Alert archive / Mississippi / Tornado Watches in 2013
Tornado Watch 34
The Storm Prediction Center issued this tornado watch at Feb 10, 2013, 5:34 PM CST for 10 parishes in Louisiana; 20 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 10, 2013, 5:34 PM CST (23:34 UTC)
- Expired
- Feb 10, 2013, 11:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 30 counties
East Baton Rouge Parish, LA, East Feliciana 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, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hancock County, MS, Jasper 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, Pike County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wilkinson County, MS
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 10, 5:36 PM CST | Tornado Warning | JAN | Covington, Jefferson Davis, Lamar, Marion | 54 min |
| Feb 10, 5:54 PM CST | Flash Flood Warning | JAN | Covington, Jefferson Davis, Jones | 3 hr |
| Feb 10, 6:11 PM CST | Tornado Warning | JAN | Jones | 64 min |
| Feb 10, 6:59 PM CST | Flash Flood Warning | JAN | Forrest, Lamar | 3 hr |
| Feb 10, 9:11 PM CST | Severe Thunderstorm Warning | JAN | Forrest, Lamar, Marion | 49 min |
| Feb 10, 9:55 PM CST | Flash Flood Warning | JAN | Forrest, Lamar, Marion | 4 hr |
| Feb 10, 10:40 PM CST | Severe Thunderstorm Warning | JAN | Lamar, Marion | 50 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 11.6 hours before the alert went out and 121 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
- 66 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 526 m²/s²
- 0-3 km storm-relative helicity
- 760 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
471
WWUS20 KWNS 102333
SEL4
SPC WW 102333
LAZ000-MSZ000-110500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 34
NWS STORM PREDICTION CENTER NORMAN OK
535 PM CST SUN FEB 10 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF SOUTHEAST LOUISIANA
SOUTHERN MISSISSIPPI
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 535 PM UNTIL
1100 PM CST.
TORNADOES...HAIL TO 1.5 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES EAST SOUTHEAST OF
BATON ROUGE LOUISIANA TO 55 MILES NORTH NORTHWEST OF PINE BELT
MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 32. WATCH NUMBER 32 WILL NOT BE IN EFFECT AFTER 535
PM CST. CONTINUE...WW 33...
DISCUSSION...UNTIL A STRONG SOUTHERLY LOW-LEVEL JET WEAKENS AND
DEVELOPS EAST OF THE REGION LATER THIS EVENING...THE RISK FOR
SUPERCELLS CAPABLE OF PRODUCING TORNADOES CONTINUES ACROSS THE
REGION.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24040.
...KERR/THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 10, 4:18 AM CST | Severe Thunderstorm Watch | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Natchitoches and 3 more | 5 hr |
| Feb 10, 5:12 AM CST | Mesoscale Discussion | SPC | Sabine | 93 min |
| Feb 10, 6:20 AM CST | Mesoscale Discussion | SPC | Allen, Avoyelles, Beauregard, Bienville, Caldwell, Catahoula and 18 more | 85 min |
| Feb 10, 6:58 AM CST | Tornado Watch | SPC | Allen, Avoyelles, Beauregard, Bienville, Caldwell, Catahoula and 24 more | 7 hr |
| Feb 10, 10:19 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Caldwell, Catahoula and 19 more | 86 min |
| Feb 10, 10:53 AM CST | Mesoscale Discussion | SPC | Avoyelles, Concordia, Evangeline, Pointe Coupee, Saint Landry, West Feliciana | 97 min |
| Feb 10, 11:10 AM CST | Tornado Watch | SPC | Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana, Evangeline and 12 more | 7 hr |
| Feb 10, 1:59 PM CST | Mesoscale Discussion | SPC | East Baton Rouge, East Feliciana, Livingston, Pointe Coupee, Saint Helena, Saint Landry and 5 more | 91 min |
| Feb 10, 3:47 PM CST | Mesoscale Discussion | SPC | Saint Helena, Washington | 88 min |
| Feb 10, 5:03 PM CST | Mesoscale Discussion | SPC | East Baton Rouge, East Feliciana, Evangeline, Livingston, Pointe Coupee, Saint Helena and 6 more | 27 min |
| Feb 10, 2:39 PM CST | Mesoscale Discussion | SPC | George, Greene, Wayne | 66 min |
| Feb 10, 3:14 PM CST | Tornado Watch | SPC | George, Greene, Harrison, Jackson, Perry, Stone and 1 more | 8 hr |
Nearby
Tornado Watches in Mississippi, 2013Tornado Watches in Louisiana, 2013Every tornado watch in 2013
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.