Alert archive / Louisiana / Tornado Watches in 2013
Tornado Watch 164
The Storm Prediction Center issued this tornado watch at May 16, 2013, 2:54 PM CDT for 17 parishes in Louisiana. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2013, 2:54 PM CDT (19:54 UTC)
- Expired
- May 16, 2013, 8:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, Winn Parish, LA
The radar
The Shreveport radar (KSHV), 65 km from the middle of the area, began a volume at 19:55 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
- 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
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 2:57 PM CDT | Tornado Warning | SHV | Bossier, Caddo, De Soto | 33 min |
| May 16, 3:27 PM CDT | Tornado Warning | SHV | Bienville, Bossier, Caddo, De Soto, Red River | 48 min |
| May 16, 4:08 PM CDT | Tornado Warning | SHV | Bienville, Natchitoches, Red River | 22 min |
| May 16, 4:29 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Red River, Winn | 61 min |
| May 16, 4:47 PM CDT | Tornado Warning | SHV | Natchitoches, Winn | 28 min |
| May 16, 5:14 PM CDT | Tornado Warning | SHV | Natchitoches, Winn | 46 min |
| May 16, 7:26 PM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Union | 64 min |
| May 16, 7:49 PM CDT | Tornado Warning | SHV | Union | 56 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 12:00Z, 7.9 hours before the alert went out and 58 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
- 186 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 12:07 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 6 more | 83 min |
| May 16, 5:38 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Concordia, Grant and 5 more | 97 min |
Nearby
Tornado 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; radar from the NEXRAD Level II archive.