Fairly experienced GA pilot narrowly misses trees at WA05 after experiencing windshear on takeoff.

Attributes
ACN	431377
Time
Date	199903
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : w52.airport
State Reference	WA
Altitude	agl single value : 50
Environment
Flight Conditions	VMC
Weather Elements	Windshear
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Route In Use	departure : vfr
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 3500 flight time type : 1000
ASRS Report	431377
Person 2
Affiliation	other
Qualification	other other : ctaf.unicom
Events
Anomaly	inflight encounter : weather inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : took evasive action flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor
Primary Problem	Environmental Factor

Narrative:

I departed runway 33, but I did not study the trees and other obstacles very well before I started the takeoff. After lifting off the ground, wind shifts (windshear) through the trees and poor climb performance made me believe I could not clear the trees. I had no choice but to bank right steeply to avoid obstructions and climb through a clearing. I should have departed to a direction with no trees at the end of runway. Windshear was a factor. Runway slope and roughness were factors.

Original NASA ASRS Text

Title: FAIRLY EXPERIENCED GA PLT NARROWLY MISSES TREES AT WA05 AFTER EXPERIENCING WINDSHEAR ON TKOF.

Narrative: I DEPARTED RWY 33, BUT I DID NOT STUDY THE TREES AND OTHER OBSTACLES VERY WELL BEFORE I STARTED THE TKOF. AFTER LIFTING OFF THE GND, WIND SHIFTS (WINDSHEAR) THROUGH THE TREES AND POOR CLB PERFORMANCE MADE ME BELIEVE I COULD NOT CLR THE TREES. I HAD NO CHOICE BUT TO BANK R STEEPLY TO AVOID OBSTRUCTIONS AND CLB THROUGH A CLRING. I SHOULD HAVE DEPARTED TO A DIRECTION WITH NO TREES AT THE END OF RWY. WINDSHEAR WAS A FACTOR. RWY SLOPE AND ROUGHNESS WERE FACTORS.

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.