Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 42, NWS Mobile, AL

June 22, 2017George County, Greene County, Mississippi

NWS Mobile, AL issued this flash flood warning at Jun 22, 2017, 11:06 AM CDT for George County, Greene 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: Jun 22, 2017, 11:06 AM CDT (16:06 UTC)
Expired: Jun 22, 2017, 5:00 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties George County, MS, Greene County, MS

The radar

The Mobile radar (KMOB), 65 km from the middle of the area, began a volume at 16:08 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 22, 11:30 AM CDT	FLASH FLOOD	Benndale, MS	MULTIPLE ROADS CLOSED ACROSS THE WESTERN HALF OF THE COUNTY.

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, 4.1 hours before the alert went out and 144 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: 951 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 272 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

As transmitted.

865 
WGUS54 KMOB 221606
FFWMOB
MSC039-041-222200-
/O.NEW.KMOB.FF.W.0042.170622T1606Z-170622T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1106 AM CDT THU JUN 22 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  George County in southeastern Mississippi...
  Greene County in southeastern Mississippi...

* Until 500 PM CDT

* At 1103 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is already in 
  progress and will likley continue for a large part of the warning 
  duration. Additional thunderstorm development with heavy rain is 
  forecast during the heart of this afternoon.

* Some locations that will experience flooding include...
  Lucedale, Leakesville and State Line. 

LAT...LON 3144 8869 3144 8845 3074 8841 3074 8887

$$

2 follow-up statements

787 
WGUS74 KMOB 221826
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
126 PM CDT THU JUN 22 2017

MSC039-041-222200-
/O.CON.KMOB.FF.W.0042.000000T0000Z-170622T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
George MS-Greene MS-
126 PM CDT THU JUN 22 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
GEORGE AND GREENE COUNTIES...

At 125 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain redeveloping over the warned area.  Flash flooding is in 
progress throughout scattered portions of the warned area. The 
potential is moderately elevated for additional flooding areas to 
develop through the course of this afternoon as individual cells 
continually move over the same rain-soaked locations.

Some locations that will experience flooding include...
Lucedale, Leakesville and State Line. 

LAT...LON 3144 8869 3144 8845 3074 8841 3074 8887

$$

355 
WGUS74 KMOB 222001
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
301 PM CDT THU JUN 22 2017

MSC039-041-222010-
/O.CAN.KMOB.FF.W.0042.000000T0000Z-170622T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
George MS-Greene MS-
301 PM CDT THU JUN 22 2017

...THE FLASH FLOOD WARNING FOR GEORGE AND GREENE COUNTIES IS
CANCELLED...

The heavy rain has temporarily ended. Continue to heed any remaining 
road closures.

LAT...LON 3144 8869 3144 8845 3074 8841 3074 8887

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 3:50 AM CDT	Special Weather Statement	MOB	Perry	40 min
Jun 22, 5:13 AM CDT	Flash Flood Warning	MOB	George, Greene, Perry	6 hr
Jun 22, 7:40 AM CDT	River Flood Warning	MOB	Greene, Wayne	21 days
Jun 22, 8:03 AM CDT	Flash Flood Warning	MOB	Wayne	6 hr
Jun 22, 4:02 PM CDT	Flash Flood Warning	MOB	George	6 hr

Nearby

Flash Flood Warnings in Mississippi, 2017 Every flash flood warning in 2017

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.