Captain of an medium large transport encountered unexpected fog on the runway during rollout which reduced the visibility to one half mi. However, there was none at the runway exit area and the taxi route to the terminal.

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Attributes
ACN	387450
Time
Date	199712
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : anc
State Reference	AK
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground other : taxi landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 2000
ASRS Report	387450
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted none taken : unable
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Anc WX was reported as wind variable at 5 KTS. Visibility 9 SM and fog in vicinity few at 500 ft, few at 900 ft. At 10 mi from the airport, ATC asked if we had the airport in sight. We confirmed that the field was in sight and ATC cleared us for a visual approach to runway 6L at anc. During the landing rollout we entered an area of fog and restr visibility. A normal landing and rollout was made. Rollout visibility was restr to approximately 1 mi to 1/2 mi variable. Normal exit of runway and taxied to gate in VFR conditions.

Original NASA ASRS Text

Title: CAPT OF AN MLG ENCOUNTERED UNEXPECTED FOG ON THE RWY DURING ROLLOUT WHICH REDUCED THE VISIBILITY TO ONE HALF MI. HOWEVER, THERE WAS NONE AT THE RWY EXIT AREA AND THE TAXI RTE TO THE TERMINAL.

Narrative: ANC WX WAS RPTED AS WIND VARIABLE AT 5 KTS. VISIBILITY 9 SM AND FOG IN VICINITY FEW AT 500 FT, FEW AT 900 FT. AT 10 MI FROM THE ARPT, ATC ASKED IF WE HAD THE ARPT IN SIGHT. WE CONFIRMED THAT THE FIELD WAS IN SIGHT AND ATC CLRED US FOR A VISUAL APCH TO RWY 6L AT ANC. DURING THE LNDG ROLLOUT WE ENTERED AN AREA OF FOG AND RESTR VISIBILITY. A NORMAL LNDG AND ROLLOUT WAS MADE. ROLLOUT VISIBILITY WAS RESTR TO APPROX 1 MI TO 1/2 MI VARIABLE. NORMAL EXIT OF RWY AND TAXIED TO GATE IN VFR CONDITIONS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.