Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

August 31, 2017Covington County, Alabama

NWS Mobile, AL issued this special weather statement at Aug 31, 2017, 3:11 AM CDT for Covington County, Alabama. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 31, 2017, 3:11 AM CDT (08:11 UTC)
Expired
Aug 31, 2017, 3:45 AM CDT
In force
34 min
Issued by
NWS Mobile, AL

County Covington County, AL

The radar

The Eglin Afb radar (KEVX), 74 km from the middle of the area, began a volume at 08:12 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.2 hours before the alert went out and 223 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, Tallahassee Rgnl, FL at 00:00Z on 2017-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1187 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, Tallahassee Rgnl, FL at 00:00Z on 2017-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.193958Sfc1 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
1187 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 31, 12:12 AM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Aug 31, 12:12 AM CDT, 2 hours 59 minutes before
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Hazardous weather outlook, Aug 30, 3:58 PM CDT, 11 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service Mobile AL
358 PM CDT Wed Aug 30 2017

ALZ051>060-261>266-FLZ201>206-MSZ067-075-076-078-079-312100-
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-
358 PM CDT Wed Aug 30 2017

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

.DAY ONE...This Afternoon and Tonight

Isolated flash flooding is possible, mainly across areas east of
Interstate 65. A Flash Flood Watch is in effect.

High surf and a high risk of rip currents will continue to impact
local beaches. A High Surf Advisory is in effect.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Isolated flash flooding will remain possible through Thursday
morning east of Interstate 65.

High surf and a high risk of rip currents will continue to impact
local beaches through Thursday.

Minor coastal flooding is possible in the typically flood prone
locations Thursday morning during the time of high tide. A Coastal
Flood Advisory is in effect.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters are encouraged to relay any flooding reports to
the National Weather Service in Mobile.

GMZ630>635-650-655-670-675-312100-
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-
358 PM CDT Wed Aug 30 2017

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

.DAY ONE...This Afternoon and Tonight

A Small Craft Advisory is in effect for strong southerly winds and
high seas.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Small Craft Advisory is in effect through Thursday night for
strong southerly winds and high seas.

In the hours before

Special weather statement, Aug 31, 3:11 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 7:31 PM CDTSpecial Weather StatementMOBWashington44 min
Aug 31, 1:17 AM CDTSpecial Marine WarningMOB43 min
Aug 31, 2:17 AM CDTSpecial Marine WarningMOB28 min
Aug 31, 4:38 AM CDTSpecial Weather StatementMOBMobile37 min
Aug 31, 4:40 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Aug 31, 4:50 AM CDTAreal Flood AdvisoryMOBCovington3 hr
Aug 31, 6:35 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Aug 31, 6:45 AM CDTSpecial Marine WarningMOB60 min
Aug 31, 7:16 AM CDTSpecial Weather StatementMOBCovington59 min
Aug 31, 7:37 AM CDTAreal Flood AdvisoryMOBCovington, Escambia3 hr
Aug 31, 8:00 AM CDTSpecial Marine WarningMOB60 min
Aug 31, 8:01 AM CDTSpecial Weather StatementMOBCovington59 min
Aug 31, 9:02 AM CDTSpecial Marine WarningMOB58 min
Aug 31, 9:06 AM CDTSpecial Marine WarningMOB54 min
Aug 31, 9:46 AM CDTSpecial Marine WarningMOB44 min
Aug 31, 10:00 AM CDTSpecial Marine WarningMOB60 min
Aug 31, 10:20 AM CDTSpecial Weather StatementMOBChoctaw40 min
Aug 31, 11:03 AM CDTSpecial Marine WarningMOB57 min
Aug 31, 11:06 AM CDTSpecial Weather StatementMOBChoctaw39 min
Aug 31, 11:37 AM CDTSevere Thunderstorm WarningMOBChoctaw, Clarke38 min
Aug 31, 12:56 PM CDTSpecial Marine WarningMOB64 min
Aug 31, 3:03 PM CDTRiver Flood WarningMOBCovington, Escambia54 hr
Aug 31, 3:06 PM CDTRiver Flood WarningMOBBaldwin22 hr
Aug 31, 3:46 PM CDTSpecial Weather StatementMOBWilcox14 min
Aug 31, 7:10 AM CDTSpecial Weather StatementMOBSanta Rosa35 min
Aug 31, 9:31 AM CDTSpecial Weather StatementMOBOkaloosa29 min
Aug 31, 9:48 AM CDTSpecial Weather StatementMOBOkaloosa42 min
Aug 31, 10:16 AM CDTFlash Flood WarningMOBOkaloosa3 hr
Aug 31, 10:33 AM CDTRiver Flood WarningMOBOkaloosa3 days
Aug 31, 10:54 AM CDTAreal Flood AdvisoryMOBOkaloosa51 min
Aug 31, 1:36 PM CDTSpecial Weather StatementMOBWayne39 min

Nearby

Special Weather Statements in Alabama, 2017Every special weather statement 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.