Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 85, NWS Mobile, AL

October 9, 2017Greene County, Mississippi

NWS Mobile, AL issued this flash flood warning at Oct 9, 2017, 1:34 PM CDT for Greene County, Mississippi. It was in force for 6 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
Oct 9, 2017, 1:34 PM CDT (18:34 UTC)
Expired
Oct 9, 2017, 7:30 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Greene County, MS

The radar

The Mobile radar (KMOB), 69 km from the middle of the area, began a volume at 18:38 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.6 hours before the alert went out and 134 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 2017-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 515 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2017-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
515 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

351 
WGUS54 KMOB 091834
FFWMOB
MSC041-100030-
/O.NEW.KMOB.FF.W.0085.171009T1834Z-171010T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
134 PM CDT MON OCT 9 2017

The National Weather Service in Mobile has issued a

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

* Until 730 PM CDT

* At 133 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar indicated 4 to 5 inches 
  of rain has fallen in the past 3 hours. Flash flooding is expected 
  to begin shortly.

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

Additional rainfall amounts of 1 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.

&&

LAT...LON 3122 8884 3121 8861 3100 8859 3100 8884

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 9, 10:18 AM CDTFlash Flood WarningMOBGeorge6 hr
Oct 9, 12:54 PM CDTAreal Flood AdvisoryMOBGreene3 hr
Oct 9, 3:37 PM CDTFlash Flood WarningMOBPerry6 hr
Oct 9, 5:50 PM CDTAreal Flood AdvisoryMOBGeorge115 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.