Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS New Orleans, LA

April 10, 2021Hancock County, Pearl River County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Apr 10, 2021, 4:06 AM CDT for Hancock County, Pearl River County, Mississippi. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 10, 2021, 4:06 AM CDT (09:06 UTC)
Expired: Apr 10, 2021, 7:00 AM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Hancock County, MS, Pearl River County, MS

What was reported inside it

Time	Report	Where	Remark
Apr 10, 6:30 AM CDT	FLASH FLOOD	1 S Picayune, MS	BROADCAST MEDIA REPORTS ROADS ARE IMPASSABLE IN A 5 BLOCK AREA AROUND NICHOLSON NEAR PICAYUNE, MS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.1 hours before the alert went out and 47 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: 2977 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 18.1

Open this sounding in Storm Lab

The text

As transmitted.

727 
WGUS54 KLIX 100906
FFWLIX
MSC045-109-101200-
/O.NEW.KLIX.FF.W.0008.210410T0906Z-210410T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
406 AM CDT Sat Apr 10 2021

The National Weather Service in New Orleans has issued a

* Flash Flood Warning for...
  Northern Hancock County in southern Mississippi...
  Pearl River County in southern Mississippi...

* Until 700 AM CDT.

* At 405 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 5 inches of rain have 
  already fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Picayune, Poplarville and Mcneil. 

Additional rainfall amounts of 2 to 4 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3086 8934 3062 8934 3043 8968 3046 8969
      3048 8972 3062 8983 3064 8982 3067 8985
      3068 8984 3077 8973 3091 8954

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR

$$

MEFFER

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 11:57 PM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike	36 min
Apr 10, 12:12 AM CDT	Severe Thunderstorm Warning	LIX	Walthall	33 min
Apr 10, 12:14 AM CDT	Special Weather Statement	LIX	Wilkinson	46 min
Apr 10, 12:41 AM CDT	Severe Thunderstorm Warning	LIX	Pearl River	11 min
Apr 10, 12:46 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike, Walthall	43 min
Apr 10, 1:33 AM CDT	Special Weather Statement	LIX	Pearl River	42 min
Apr 10, 1:45 AM CDT	Tornado Warning	LIX	Wilkinson	45 min
Apr 10, 1:52 AM CDT	Special Weather Statement	LIX	Pearl River	38 min
Apr 10, 2:01 AM CDT	Severe Thunderstorm Warning	LIX	Pearl River	29 min
Apr 10, 2:05 AM CDT	Tornado Warning	LIX	Pearl River	10 min
Apr 10, 2:42 AM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison	33 min
Apr 10, 2:58 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike	35 min
Apr 10, 3:11 AM CDT	Severe Thunderstorm Warning	LIX	Harrison, Jackson	49 min
Apr 10, 3:20 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Wilkinson	33 min
Apr 10, 3:29 AM CDT	Severe Thunderstorm Warning	LIX	Harrison, Jackson	31 min
Apr 10, 3:36 AM CDT	Special Weather Statement	LIX	Pearl River	39 min
Apr 10, 3:55 AM CDT	Severe Thunderstorm Warning	LIX	Harrison, Jackson	14 min
Apr 10, 5:07 AM CDT	Special Weather Statement	LIX	Hancock	23 min
Apr 10, 5:35 AM CDT	Special Weather Statement	LIX	Harrison	25 min
Apr 10, 6:02 AM CDT	Areal Flood Advisory	LIX	Jackson	3 hr
Apr 10, 9:49 AM CDT	River Flood Warning	LIX	Pike, Walthall	56 hr
Apr 10, 9:58 AM CDT	River Flood Warning	LIX	Harrison	25 hr

Nearby

Flash Flood Warnings in Mississippi, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.