Narrative:

Contacted potomac clearance; received squawk code; circled W50 until radar contact with potomac approach; ATC canceled upon exiting ADIZ. Frederick area WX worse than expected; landed at fdk; refuel; waited for WX to clear; departed 45 mins later. After takeoff; made two attempts to contact FSS to activate flight plan but unsuccessful (static). Cumulus clouds in the general area with cumulonimbus clouds off my right wing way (20+ miles away). Chose to deal with the WX issues first and contact FSS later to activate flight plan. Monitored potomac approach on radio #1; radio #2 was on the guard channel. I never heard anyone 'announce' an aircraft was about to or had violated dc ADIZ airspace. Heard numerous commercial airliners requesting permission to change heading/ direction to avoid 'cell activity.' around winchester; va; changed heading numerous times to maintain VFR; FSS can verify WX conditions along my route of flight. Convective WX north of the linden VOR forced me to change heading more to the south; but only briefly. Flying a westerly heading was not an option. North of flatrock VOR; contacted washington center for 'flight following.' after answering a few questions (destination/departure); was issued squawk code and told that FAA wanted me to contact them immediately upon landing. At 60J; called on phone; was told I had violated ADIZ airspace by 1 to 1.5 miles. Explained that to the best of my knowledge I did not think I had. To maintain VFR; had to change heading while in that general area. Convective WX at 8500 ft MSL required my flying the plane not looking at landmarks on the ground; that I respect and understand the importance of the ADIZ but entry was unintentional. My aircraft has a tie down space inside the dc ADIZ at ZZZ1. Over the past three years I have flown out of and back into the ADIZ over 100 times; have attended numerous pilot group sponsored safety meetings; read and am familiar with all FAA NOTAMS regarding flying in the dc ADIZ. If I did violate the dc ADIZ; it was very brief and done only to avoid convective WX. Prior to contacting washington center for 'flight following;' I had tried multiple times to contact potomac approach for the same service; but they were too busy at the time to accommodate me.

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Original NASA ASRS Text

Title: A VFR PLT BASED IN THE POTOMAC ADIZ EXITED THE ADIZ VFR THEN ENTERED THE ADIZ WITHOUT CLRNC WHILE AVOIDING WX.

Narrative: CONTACTED POTOMAC CLRNC; RECEIVED SQUAWK CODE; CIRCLED W50 UNTIL RADAR CONTACT WITH POTOMAC APCH; ATC CANCELED UPON EXITING ADIZ. FREDERICK AREA WX WORSE THAN EXPECTED; LANDED AT FDK; REFUEL; WAITED FOR WX TO CLEAR; DEPARTED 45 MINS LATER. AFTER TKOF; MADE TWO ATTEMPTS TO CONTACT FSS TO ACTIVATE FLT PLAN BUT UNSUCCESSFUL (STATIC). CUMULUS CLOUDS IN THE GENERAL AREA WITH CUMULONIMBUS CLOUDS OFF MY RIGHT WING WAY (20+ MILES AWAY). CHOSE TO DEAL WITH THE WX ISSUES FIRST AND CONTACT FSS LATER TO ACTIVATE FLT PLAN. MONITORED POTOMAC APCH ON RADIO #1; RADIO #2 WAS ON THE GUARD CHANNEL. I NEVER HEARD ANYONE 'ANNOUNCE' AN ACFT WAS ABOUT TO OR HAD VIOLATED DC ADIZ AIRSPACE. HEARD NUMEROUS COMMERCIAL AIRLINERS REQUESTING PERMISSION TO CHANGE HDG/ DIRECTION TO AVOID 'CELL ACTIVITY.' AROUND WINCHESTER; VA; CHANGED HDG NUMEROUS TIMES TO MAINTAIN VFR; FSS CAN VERIFY WX CONDITIONS ALONG MY RTE OF FLT. CONVECTIVE WX NORTH OF THE LINDEN VOR FORCED ME TO CHANGE HDG MORE TO THE SOUTH; BUT ONLY BRIEFLY. FLYING A WESTERLY HDG WAS NOT AN OPTION. NORTH OF FLATROCK VOR; CONTACTED WASHINGTON CTR FOR 'FLT FOLLOWING.' AFTER ANSWERING A FEW QUESTIONS (DEST/DEP); WAS ISSUED SQUAWK CODE AND TOLD THAT FAA WANTED ME TO CONTACT THEM IMMEDIATELY UPON LNDG. AT 60J; CALLED ON PHONE; WAS TOLD I HAD VIOLATED ADIZ AIRSPACE BY 1 TO 1.5 MILES. EXPLAINED THAT TO THE BEST OF MY KNOWLEDGE I DID NOT THINK I HAD. TO MAINTAIN VFR; HAD TO CHANGE HDG WHILE IN THAT GENERAL AREA. CONVECTIVE WX AT 8500 FT MSL REQUIRED MY FLYING THE PLANE NOT LOOKING AT LANDMARKS ON THE GND; THAT I RESPECT AND UNDERSTAND THE IMPORTANCE OF THE ADIZ BUT ENTRY WAS UNINTENTIONAL. MY ACFT HAS A TIE DOWN SPACE INSIDE THE DC ADIZ AT ZZZ1. OVER THE PAST THREE YEARS I HAVE FLOWN OUT OF AND BACK INTO THE ADIZ OVER 100 TIMES; HAVE ATTENDED NUMEROUS PLT GROUP SPONSORED SAFETY MEETINGS; READ AND AM FAMILIAR WITH ALL FAA NOTAMS REGARDING FLYING IN THE DC ADIZ. IF I DID VIOLATE THE DC ADIZ; IT WAS VERY BRIEF AND DONE ONLY TO AVOID CONVECTIVE WX. PRIOR TO CONTACTING WASHINGTON CTR FOR 'FLT FOLLOWING;' I HAD TRIED MULTIPLE TIMES TO CONTACT POTOMAC APCH FOR THE SAME SERVICE; BUT THEY WERE TOO BUSY AT THE TIME TO ACCOMMODATE ME.

Data retrieved from NASA's ASRS site as of January 2009 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.