Alert archive / Alabama / Dense Fog Advisories in 2012
Dense Fog Advisory 21, NWS Mobile, AL
NWS Mobile, AL issued this dense fog advisory at Mar 17, 2012, 2:56 AM CDT for Escambia County, Alabama; George County, Mississippi. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Mar 17, 2012, 2:56 AM CDT (07:56 UTC)
- Expired
- Mar 17, 2012, 11:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS Mobile, AL
Counties Escambia County, AL, George County, MS
The radar
The Mobile radar (KMOB), 48 km from the middle of the area, began a volume at 07:54 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 00:00Z, 7.9 hours before the alert went out and 191 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.
- Mixed-layer CAPE
- 375 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1123 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
511 WWUS74 KMOB 170756 NPWMOB URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOBILE AL 256 AM CDT SAT MAR 17 2012 ...AREAS OF DENSE FOG IMPACTING THE GULF COAST... .A MOIST AND LIGHT SOUTHERLY FLOW HAS RESULTED IN DENSE FOG ALONG THE GULF COAST. ALZ059-061>064-FLZ001>006-MSZ079-171400- /O.NEW.KMOB.FG.Y.0021.120317T0756Z-120317T1400Z/ ESCAMBIA-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE-LOWER BALDWIN- INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA- COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-GEORGE- INCLUDING THE CITIES OF...ATMORE...BREWTON...EAST BREWTON... MOBILE...PRICHARD...SARALAND...BAY MINETTE...TILLMANS CORNER... THEODORE...DAPHNE...FAIRHOPE...FOLEY...SPANISH FORT...CENTURY... FLOMATON...MOLINO...FERRY PASS...BRENT...WEST PENSACOLA... BELLVIEW...ENSLEY...MYRTLE GROVE...JAY...PACE...MILTON... CRESTVIEW...WRIGHT...NICEVILLE...SEMINOLE...EGLIN AFB...LUCEDALE 256 AM CDT SAT MAR 17 2012 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A DENSE FOG ADVISORY...WHICH IS IN EFFECT UNTIL 9 AM CDT THIS MORNING. * TIMING...DENSE FOG REDUCING VISIBILITY TO AT OR LESS THAN A QUARTER MILE EXPECTED THROUGH 9 AM CDT THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. && $$
1 follow-up statement
581 WWUS74 KMOB 171338 NPWMOB URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOBILE AL 838 AM CDT SAT MAR 17 2012 ...AREAS OF DENSE FOG AFFECTING THE GULF COAST... .A MOIST AND LIGHT SOUTHERLY FLOW IS BRINGING DENSE FOG ALONG THE GULF COAST. ALZ059-061>064-FLZ001>006-MSZ079-171600- /O.EXT.KMOB.FG.Y.0021.000000T0000Z-120317T1600Z/ ESCAMBIA-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE-LOWER BALDWIN- INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA- COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-GEORGE- INCLUDING THE CITIES OF...ATMORE...BREWTON...EAST BREWTON... MOBILE...PRICHARD...SARALAND...BAY MINETTE...TILLMANS CORNER... THEODORE...DAPHNE...FAIRHOPE...FOLEY...SPANISH FORT...CENTURY... FLOMATON...MOLINO...FERRY PASS...BRENT...WEST PENSACOLA... BELLVIEW...ENSLEY...MYRTLE GROVE...JAY...PACE...MILTON... CRESTVIEW...WRIGHT...NICEVILLE...SEMINOLE...EGLIN AFB...LUCEDALE 838 AM CDT SAT MAR 17 2012 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 11 AM CDT THIS MORNING... * TIMING...DENSE FOG REDUCING VISIBILITY TO AT OR LESS THAN A QUARTER MILE EXPECTED THROUGH 11 AM CDT THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A DENSE FOG ADVISORY MEANS VISIBILITY WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN... USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. AVOID ALL DISTRACTION...VISIBILITY WILL FALL BELOW 100 FEET IN PLACES. && $$
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 3:38 PM CDT | Dense Fog Advisory | MOB | 18 hr | |
| Mar 17, 3:04 AM CDT | Marine Dense Fog Advisory | MOB | 8 hr | |
| Mar 17, 3:42 PM CDT | Marine Dense Fog Advisory | MOB | 19 hr |
Nearby
Dense Fog Advisories in Alabama, 2012Dense Fog Advisories in Mississippi, 2012Dense Fog Advisories in Florida, 2012Every dense fog advisory in 2012
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.