Alert archive / Mississippi / Flash Flood Warnings in 2018

Flash Flood Warning 34, NWS Mobile, AL

December 27, 2018Perry County, Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Dec 27, 2018, 6:13 PM CST for Perry County, Wayne County, Mississippi. It was in force for 6 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: Dec 27, 2018, 6:13 PM CST (00:13 UTC)
Expired: Dec 28, 2018, 12:15 AM CST
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 111 km from the middle of the area, began a volume at 00:13 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
Dec 27, 6:30 PM CST	FLASH FLOOD	1 W Whistler, MS	NUMEROUS ROADS CLOSED DUE TO FLOODING ACROSS THE ENTIRE COUNTY. AT LEAST 15 ROADS COMPLETELY WASHED OUT IN WAYNE COUNTY.

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

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.2 hours before the alert went out and 142 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: 11 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 472 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

328 
WGUS54 KMOB 280013
FFWMOB
MSC111-153-280615-
/O.NEW.KMOB.FF.W.0034.181228T0013Z-181228T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
613 PM CST THU DEC 27 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northern Perry County in southeastern Mississippi...
  Western Wayne County in southeastern Mississippi...

* Until 1215 AM CST Friday.

* At 611 PM CST, Doppler radar indicated heavy rain across the 
  warned area. Up to 2 to 4 inches of rain have already fallen. 
  Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Beaumont and New Augusta. 

Additional rainfall amounts of 2 to 3 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.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3143 8915 3143 8894 3182 8894 3183 8876
      3187 8857 3128 8902 3111 8884 3111 8914

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 27, 6:32 PM CST	Flash Flood Warning	MOB	Greene, Wayne	6 hr
Dec 27, 7:55 PM CST	Flash Flood Warning Emergency	MOB	Greene, Perry, Wayne	7 hr
Dec 27, 8:13 PM CST	Special Weather Statement	MOB	Wayne	47 min
Dec 27, 9:41 PM CST	River Flood Warning	MOB	George, Greene, Jackson	15 days
Dec 28, 12:14 AM CST	Flash Flood Warning	MOB	Wayne	3 hr
Dec 28, 1:30 AM CST	Special Weather Statement	MOB	Perry	45 min
Dec 28, 1:43 AM CST	Special Weather Statement	MOB	Wayne	32 min
Dec 28, 2:26 AM CST	Flash Flood Warning	MOB	Greene, Perry, Stone	3 hr
Dec 28, 2:47 AM CST	Tornado Warning	MOB	Greene, Wayne	28 min
Dec 28, 3:14 AM CST	Flash Flood Warning Emergency	MOB	Greene, Perry, Wayne	3 hr
Dec 28, 4:17 AM CST	Special Weather Statement	MOB	George	43 min
Dec 28, 4:27 AM CST	River Flood Warning	MOB	Perry	6 days
Dec 28, 4:45 AM CST	Severe Thunderstorm Warning	MOB	George, Greene	45 min
Dec 28, 4:52 AM CST	Areal Flood Advisory	MOB	George, Greene	3 hr
Dec 28, 6:11 AM CST	River Flood Warning	MOB	Greene, Wayne	3 days
Dec 28, 6:13 AM CST	Areal Flood Warning	MOB	Greene, Perry, Wayne	6 hr
Dec 28, 9:03 AM CST	Areal Flood Warning	MOB	George, Greene, Perry, Wayne	27 hr
Dec 28, 9:57 AM CST	River Flood Warning	MOB	Perry	21 days

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.