Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 58, NWS New Orleans, LA

June 21, 2021Harrison County, Jackson County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Jun 21, 2021, 6:51 PM CDT for Harrison County, Jackson County, Mississippi. It was in force for 3 hr. 3 reports 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: Jun 21, 2021, 6:51 PM CDT (23:51 UTC)
Expired: Jun 21, 2021, 10:00 PM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Harrison County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 72 km from the middle of the area, began a volume at 23:54 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 was reported inside it

Time	Report	Where	Remark
Jun 21, 8:30 PM CDT	FLASH FLOOD	2 W Biloxi, MS	BROADCAST MEDIA REPORTS WILKES AVE IS CLOSED DUE TO FLOODING. RELAYED VIA SOCIAL MEDIA.
Jun 21, 8:30 PM CDT	FLASH FLOOD	5 Wnw Saint Martin, MS	BROADCAST MEDIA REPORTS ROCKY MOUNTAIN DR, OLYMPIA WAY AND SIERRA COVE CLOSED DUE TO FLOODING.
Jun 21, 10:00 PM CDT	FLASH FLOOD	2 Ese Gulfport, MS	BROADCAST MEDIA SHARED VIDEO OF A CAR STALLING IN FLOOD WATER ON HWY 90 NEAR COURTHOUSE RD.

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 12:00Z, 11.9 hours before the alert went out and 76 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: 730 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

751 
WGUS54 KLIX 212351
FFWLIX
MSC047-059-220300-
/O.NEW.KLIX.FF.W.0058.210621T2351Z-210622T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
651 PM CDT Mon Jun 21 2021

The National Weather Service in New Orleans has issued a

* Flash Flood Warning for...
  Southern Harrison County in southern Mississippi...
  Southwestern Jackson County in southern Mississippi...

* Until 1000 PM CDT.

* At 651 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. The expected rainfall rate is 1 to 3 inches in 1 
  hour. Additional rainfall amounts of 1 to 2 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Gulfport, Biloxi, Ocean Springs, Long Beach, St. Martin, 
  D'iberville, Latimer, Gulf Hills, Lyman, Vancleave, Wade and 
  Gulfport Airport.

This includes the following Interstates...
	Interstate 110 in Mississippi near mile marker 1...and
	between mile markers 3 and 4.
	Interstate 10 in Mississippi between mile markers 24 and 55.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3042 8926 3063 8879 3063 8854 3039 8881
      3041 8884 3043 8885 3042 8901 3041 8899
      3042 8890 3040 8886 3037 8883 3037 8884
      3039 8886 3039 8897 3031 8927

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

$$

CAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:11 PM CDT	Areal Flood Advisory	LIX	Harrison	91 min
Jun 21, 2:55 PM CDT	Flash Flood Warning	LIX	Harrison, Jackson	67 min
Jun 21, 4:36 PM CDT	Special Weather Statement	LIX	Hancock, Pearl River	24 min
Jun 21, 4:57 PM CDT	Areal Flood Advisory	LIX	Hancock, Harrison, Pearl River	3 hr
Jun 21, 5:18 PM CDT	Severe Thunderstorm Warning	LIX	Hancock	42 min
Jun 21, 5:49 PM CDT	Areal Flood Advisory	LIX	Hancock, Harrison	3 hr
Jun 21, 5:50 PM CDT	Special Weather Statement	LIX	Amite	25 min
Jun 21, 5:55 PM CDT	Flash Flood Warning	LIX	Hancock, Harrison	3 hr
Jun 21, 5:55 PM CDT	Special Weather Statement	LIX	Hancock, Harrison	50 min
Jun 21, 6:24 PM CDT	Special Weather Statement	LIX	Amite, Pike	66 min
Jun 21, 6:32 PM CDT	Special Weather Statement	LIX	Jackson	58 min

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; radar from the NEXRAD Level II archive.