Alert archive / Louisiana / Flash Flood Warnings in 2023

Flash Flood Warning 18, NWS Jackson, MS

April 27, 2023Franklin Parish, Tensas Parish, Louisiana

NWS Jackson, MS issued this flash flood warning at Apr 27, 2023, 4:51 AM CDT for Franklin Parish, Tensas Parish, Louisiana. It was in force for 108 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 27, 2023, 4:51 AM CDT (09:51 UTC)
Expired: Apr 27, 2023, 6:39 AM CDT
In force: 108 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Franklin Parish, LA, Tensas Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 145 km from the middle of the area, began a volume at 09:51 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.9 hours before the alert went out and 265 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1037 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 906 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:05 PM CDT	Special Weather Statement	JAN	Copiah, Jefferson Davis, Lawrence, Lincoln	40 min
Apr 26, 8:00 PM CDT	Special Weather Statement	JAN	Clarke, Covington, Jasper, Smith	60 min
Apr 26, 9:01 PM CDT	Special Weather Statement	JAN	Clarke	59 min
Apr 26, 11:46 PM CDT	Special Weather Statement	JAN	Claiborne	44 min
Apr 27, 3:20 AM CDT	Special Weather Statement	JAN	Claiborne	25 min
Apr 27, 3:28 AM CDT	Severe Thunderstorm Warning	JAN	Lamar, Marion	62 min
Apr 27, 3:59 AM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar, Marion	61 min
Apr 27, 4:50 AM CDT	Special Weather Statement	JAN	Jones	25 min
Apr 27, 5:16 AM CDT	Severe Thunderstorm Warning	JAN	Jones	29 min
Apr 27, 9:12 AM CDT	Special Weather Statement	JAN	Lamar	48 min
Apr 27, 4:48 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	57 min
Apr 27, 5:16 PM CDT	Special Weather Statement	JAN	Webster	59 min
Apr 27, 5:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	JAN	Clay, Lowndes	62 min
Apr 27, 5:51 PM CDT	Special Weather Statement	JAN	Clay, Oktibbeha	54 min
Apr 27, 6:04 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Clay, Oktibbeha, Webster	56 min
Apr 27, 6:45 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	60 min
Apr 26, 10:53 PM CDT	Special Weather Statement	JAN	Tensas	67 min

Nearby

Flash Flood Warnings in Louisiana, 2023 Every flash flood warning in 2023

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.