Alert archive / Louisiana / Tornado Watches in 2013
Tornado Watch 165
The Storm Prediction Center issued this tornado watch at May 16, 2013, 7:59 PM CDT for Ashley County, Chicot County, Union County, Arkansas; 11 parishes in Louisiana; 5 counties in Mississippi. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2013, 7:59 PM CDT (00:59 UTC)
- Expired
- May 17, 2013, 12:08 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
Counties Ashley County, AR, Chicot County, AR, Union County, AR, Claiborne Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, West Carroll Parish, LA, Humphreys County, MS, Issaquena County, MS, Sharkey County, MS, Warren County, MS, Washington County, MS
The radar
The Shreveport radar (KSHV), 185 km from the middle of the area, began a volume at 00:59 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 8:15 PM CDT | Severe Thunderstorm Warning | JAN | Ashley | 45 min |
| May 16, 8:28 PM CDT | Severe Thunderstorm Warning | SHV | Union | 62 min |
| May 16, 8:47 PM CDT | Severe Thunderstorm Warning | JAN | Ashley | 43 min |
| May 16, 9:00 PM CDT | Tornado Warning | JAN | Ashley | 60 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
Shreveport, LA (KSHV), launched 00:00Z, 1.0 hours before the alert went out and 176 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
- 771 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 358 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 7:24 PM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Drew, Union | 96 min |
| May 16, 10:59 PM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Chicot | 61 min |
| May 17, 4:00 PM CDT | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Columbia and 5 more | 60 min |
| May 17, 1:39 PM CDT | Mesoscale Discussion | SPC | Attala, Carroll, Choctaw, Clarke, Clay, Holmes and 18 more | 96 min |
| May 17, 5:45 PM CDT | Mesoscale Discussion | SPC | Kemper, Lauderdale, Noxubee | 60 min |
Nearby
Tornado Watches in Louisiana, 2013Tornado Watches in Mississippi, 2013Tornado Watches in Arkansas, 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; radar from the NEXRAD Level II archive.