Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS New Orleans, LA

May 12, 2021Pike County, Mississippi

NWS New Orleans, LA issued this flash flood warning at May 12, 2021, 12:16 AM CDT for Pike County, Mississippi. It was in force for 3 hr. 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 12, 2021, 12:16 AM CDT (05:16 UTC)
Expired: May 12, 2021, 3:15 AM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

County Pike County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 5.3 hours before the alert went out and 120 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: 52 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 798 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

092 
WGUS54 KLIX 120516
FFWLIX
MSC113-120815-
/O.NEW.KLIX.FF.W.0030.210512T0516Z-210512T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1216 AM CDT Wed May 12 2021

The National Weather Service in New Orleans has issued a

* Flash Flood Warning for...
  Northern Pike County in southern Mississippi...

* Until 315 AM CDT.

* At 1216 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 inches of 
  rain have fallen. Flash flooding is expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  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 flash flooding include...
  Mccomb and Summit.

This includes the following Interstates...
	Interstate 55 in Mississippi between mile markers 13 and 23.

Additional rainfall amounts of 1 to 2 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 3135 9055 3135 9026 3119 9026 3118 9055

FLASH FLOOD...RADAR INDICATED

$$

CAB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 9:08 PM CDT	River Flood Warning	LIX	Harrison	4 days
May 11, 9:10 PM CDT	River Flood Warning	LIX	Harrison	60 hr
May 11, 10:31 PM CDT	Flash Flood Warning	LIX	Amite, Wilkinson	3 hr
May 12, 2:53 AM CDT	Severe Thunderstorm Warning	LIX	Hancock	24 min
May 12, 3:26 AM CDT	Areal Flood Advisory	LIX	Hancock, Harrison, Jackson	11 min
May 12, 3:37 AM CDT	Flash Flood Warning	LIX	Harrison, Jackson	71 min
May 12, 9:24 AM CDT	River Flood Warning	LIX	Pike, Walthall	45 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; the sounding from the Mesonet's radiosonde archive.