Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 60, NWS Mobile, AL

July 24, 2017Stone County, Mississippi

NWS Mobile, AL issued this flash flood warning at Jul 24, 2017, 7:01 AM CDT for Stone County, Mississippi. It was in force for 3 hr. 4 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
Jul 24, 2017, 7:01 AM CDT (12:01 UTC)
Expired
Jul 24, 2017, 10:00 AM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Stone County, MS

The radar

The Mobile radar (KMOB), 93 km from the middle of the area, began a volume at 12:05 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

TimeReportWhereRemark
Jul 24, 7:30 AM CDTFLASH FLOOD10 W Wiggins, MSSECTIONS OF STUMP TEXAS ROAD BLOCKED OFF DUE TO WATER OVER ROADWAYS.
Jul 24, 8:30 AM CDTFLASH FLOOD1 Ssw Wiggins, MSSECTIONS OF SOUTH MAGNOLIA DR BLOCKED OFF DUE TO WATER OVER THE ROAD FROM STREET FLOODING.
Jul 24, 8:30 AM CDTFLASH FLOOD3 Wsw Wiggins, MSDENSON RD BLOCKED OFF WITH STREET FLOODING DUE TO WATER OVER THE ROAD IN WESTERN WIGGINS, MS
Jul 24, 8:30 AM CDTFLASH FLOODEse Wiggins, MSSTAPP ST BLOCKED OFF WITH WATER OVER ROAD IN WIGGINS, 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 12:00Z, 0.0 hours before the alert went out and 86 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2017-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2227 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2227 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

612 
WGUS54 KMOB 241201
FFWMOB
MSC131-241500-
/O.NEW.KMOB.FF.W.0060.170724T1201Z-170724T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
701 AM CDT MON JUL 24 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northwestern Stone County in southeastern Mississippi...

* Until 1000 AM CDT

* At 701 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to four inches of rain have 
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Wiggins.

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 3091 8907 3080 8908 3086 8934 3091 8934

$$
1 follow-up statement
353 
WGUS74 KMOB 241409
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
909 AM CDT MON JUL 24 2017

MSC131-241500-
/O.CON.KMOB.FF.W.0060.000000T0000Z-170724T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stone MS-
909 AM CDT MON JUL 24 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 AM CDT FOR
NORTHWESTERN STONE COUNTY...

At 857 AM CDT, emergency management reported that Stapp Street and 
Denson Road was blocked off due to water over the roadway in 
Wiggins. Flooding was also reported on parts of South Magnolia Drive 
and Stump Texas Road.   

At 905 AM CDT, Doppler radar continued to indicate showers and 
thunderstorms producing very heavy rain over the warned area. An 
estimated 5 to 7 inches of rain has already fallen this morning, and 
additional showers and thunderstorms training over northwestern 
Stone county will bring additional heavy rainfall and continued 
flash flooding. 

Some locations that will experience flooding include...
Wiggins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3091 8907 3080 8908 3086 8934 3091 8934

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 6:32 AM CDTAreal Flood AdvisoryMOBStone3 hr
Jul 24, 9:56 AM CDTFlash Flood WarningMOBStone6 hr
Jul 24, 11:29 AM CDTFlash Flood WatchMOBGeorge, Greene, Perry, Stone, Wayne8 hr
Jul 24, 3:39 PM CDTAreal Flood WarningMOBStone6 hr

Nearby

Flash Flood Warnings in Mississippi, 2017Every 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.