Alert archive / Mississippi / Flash Flood Warnings in 2018

Flash Flood Warning 39, NWS Jackson, MS

May 26, 2018Jefferson Davis County, Lawrence County, Mississippi

NWS Jackson, MS issued this flash flood warning at May 26, 2018, 5:37 PM CDT for Jefferson Davis County, Lawrence County, Mississippi. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 26, 2018, 5:37 PM CDT (22:37 UTC)
Expired: May 26, 2018, 6:30 PM CDT
In force: 53 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Flood severity: None

Counties Jefferson Davis County, MS, Lawrence County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 99 km from the middle of the area, began a volume at 22:41 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

Jackson, MS (KJAN), launched 12:00Z, 10.6 hours before the alert went out and 104 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: 1113 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 657 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

846 
WGUS54 KJAN 262237
FFWJAN
MSC065-077-262330-
/O.NEW.KJAN.FF.W.0039.180526T2237Z-180526T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
537 PM CDT SAT MAY 26 2018

The National Weather Service in Jackson has issued a

* Flash Flood Warning for...
  Southeastern Lawrence County in south central Mississippi...
  Southwestern Jefferson Davis County in south central Mississippi...

* Until 630 PM CDT.

* At 536 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have 
  already fallen. Flash flooding is expected to begin shortly. An 
  additional one to two inches can be expected. Some flooding has 
  been reported in the Oak Vale area.

* Some locations that will experience flooding include...
  Oak Vale and Tilton. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3133 9008 3149 9004 3150 8993 3139 8993
      3139 8997 3140 9004 3134 9004 3133 9006

$$

17

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 7:12 PM CDT	Special Weather Statement	JAN	Issaquena, Sharkey	48 min
May 26, 11:57 AM CDT	Special Weather Statement	JAN	Washington	33 min
May 26, 12:14 PM CDT	Special Weather Statement	JAN	Sharkey	31 min
May 26, 12:36 PM CDT	Special Weather Statement	JAN	Sharkey	24 min
May 26, 1:09 PM CDT	Special Weather Statement	JAN	Sharkey	51 min
May 26, 1:15 PM CDT	Special Weather Statement	JAN	Simpson	45 min
May 26, 1:19 PM CDT	Special Weather Statement	JAN	Hinds	41 min
May 26, 1:24 PM CDT	Special Weather Statement	JAN	Humphreys	51 min
May 26, 1:28 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Washington	23 min
May 26, 1:30 PM CDT	Special Weather Statement	JAN	Copiah	30 min
May 26, 1:53 PM CDT	Special Weather Statement	JAN	Yazoo	37 min
May 26, 1:56 PM CDT	Special Weather Statement	JAN	Issaquena	34 min
May 26, 2:43 PM CDT	Special Weather Statement	JAN	Franklin	32 min
May 26, 2:48 PM CDT	Special Weather Statement	JAN	Yazoo	27 min
May 26, 2:54 PM CDT	Special Weather Statement	JAN	Jasper	36 min
May 26, 2:56 PM CDT	Special Weather Statement	JAN	Yazoo	34 min
May 26, 3:15 PM CDT	Special Weather Statement	JAN	Scott	30 min
May 26, 3:22 PM CDT	Special Weather Statement	JAN	Jefferson	23 min
May 26, 3:27 PM CDT	Special Weather Statement	JAN	Warren	33 min
May 26, 3:41 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Hinds, Warren	64 min
May 26, 4:10 PM CDT	Flash Flood Warning	JAN	Warren	65 min
May 26, 4:25 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne	50 min
May 26, 4:59 PM CDT	Severe Thunderstorm Warning	JAN	Marion	25 min
May 26, 5:21 PM CDT	Special Weather Statement	JAN	Adams	24 min
May 26, 5:42 PM CDT	Special Weather Statement	JAN	Carroll	33 min
May 26, 5:53 PM CDT	Special Weather Statement	JAN	Lincoln	37 min
May 26, 5:58 PM CDT	Severe Thunderstorm Warning	JAN	Lincoln	47 min
May 26, 6:16 PM CDT	Special Weather Statement	JAN	Simpson	29 min
May 26, 6:24 PM CDT	Flash Flood Warning	JAN	Lincoln	66 min

Nearby

Flash Flood Warnings in Mississippi, 2018 Every flash flood warning in 2018

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.