Alert archive / Mississippi / Areal Flood Warnings in 2017

Areal Flood Warning 10, NWS Mobile, AL

July 24, 2017Stone County, Mississippi

NWS Mobile, AL issued this areal flood warning at Jul 24, 2017, 3:39 PM CDT for Stone 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 counties it named.

The facts

Issued
Jul 24, 2017, 3:39 PM CDT (20:39 UTC)
Expired
Jul 24, 2017, 9:30 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Stone County, MS

The radar

The Mobile radar (KMOB), 85 km from the middle of the area, began a volume at 20:39 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, 8.7 hours before the alert went out and 82 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°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 2017-07-24The 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

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this areal flood warning went out at Jul 24, 12:35 PM CDT, 3 hours 4 minutes earlier.

Area forecast discussion, Jul 24, 12:35 PM CDT, 3 hours 4 minutes before
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Hazardous weather outlook, Jul 24, 10:54 AM CDT, 4 hours 45 minutes before
Hazardous Weather Outlook...UPDATE
National Weather Service Mobile AL
1054 AM CDT Mon Jul 24 2017

ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-251200-
Choctaw-Washington-Clarke-Wilcox-Monroe-Conecuh-Butler-Crenshaw-
Escambia-Covington-Mobile Inland-Baldwin Inland-Mobile Central-
Baldwin Central-Mobile Coastal-Baldwin Coastal-Escambia Inland-
Escambia Coastal-Santa Rosa Inland-Santa Rosa Coastal-
Okaloosa Inland-Okaloosa Coastal-Wayne-Perry-Greene-Stone-George-
1054 AM CDT Mon Jul 24 2017

This Hazardous Weather Outlook is for portions of south central
Alabama...southwest Alabama...northwest Florida and southeast
Mississippi.

.DAY ONE...Rest of Today and Tonight

Storms are forecast to increase in coverage through the course of
the day. The stronger storms will likely contain brief strong
gusty winds and frequent lightning.

A very moist atmosphere will allow today's thunderstorms to bring
locally heavy rains to the area. There is an increased risk of flash
flooding along and southwest of a Waynesboro, Mississippi to
Valparaiso, Florida line into this evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Gusty winds, frequent lightning, and locally heavy rains can be
expected with the stronger thunderstorms that develop each day.

Away from storms, heat indices look to rise to a range of 100 to
105 degrees each afternoon.

.SPOTTER INFORMATION STATEMENT...

Activation of SkyWarn Severe Storm Spotter networks is not
expected through Sunday.

GMZ630>635-650-655-670-675-251200-
Northern Mobile Bay-Southern Mobile Bay-Mississippi Sound-
Perdido Bay-Pensacola Bay System-Choctawhatchee Bay-
Coastal waters from Pensacola FL to Pascagoula MS out 20 NM-
Coastal waters from Destin to Pensacola FL out 20 NM-
Waters from Pensacola FL to Pascagoula MS from 20 to 60 NM-
Waters from Destin to Pensacola FL from 20 to 60 NM-
1054 AM CDT Mon Jul 24 2017

This Hazardous Weather Outlook is for portions of the coastal
waters of Alabama and northwest Florida.

.DAY ONE...Rest of Today and Tonight

Winds, waves and seas locally higher with the passage of storms.
Frequent lightning activity likely in and near any of the stronger
marine storms with a few waterspouts possible as well.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Winds, waves and seas locally higher with the passage of storms.
Frequent lightning activity likely in and near any of the stronger
marine storms with a few waterspouts possible as well.

In the hours before

Local storm report, Jul 24, 11:58 AM CDT, 3 hours 41 minutes before
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Local storm report, Jul 24, 12:18 PM CDT, 3 hours 21 minutes before
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Local storm report, Jul 24, 3:35 PM CDT, 4 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 7:14 AM CDTAreal Flood AdvisoryMOBMobile3 hr
Jul 24, 7:24 AM CDTSpecial Marine WarningMOB96 min
Jul 24, 8:18 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Jul 24, 8:28 AM CDTSpecial Marine WarningMOB92 min
Jul 24, 8:43 AM CDTFlash Flood WarningMOBMobile6 hr
Jul 24, 6:32 AM CDTAreal Flood AdvisoryMOBStone3 hr
Jul 24, 7:01 AM CDTFlash Flood WarningMOBStone3 hr
Jul 24, 9:56 AM CDTFlash Flood WarningMOBStone6 hr
Jul 24, 11:29 AM CDTFlash Flood WatchMOBGeorge, Greene, Perry, Stone, Wayne8 hr

Nearby

Areal Flood Warnings in Mississippi, 2017Every areal 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.