A light aircraft pilot reported a tfr incursion when foreflight was slow to display the tfr.

Attributes
ACN	1760917
Time
Date	202009
Local Time Of Day	1201-1800
Place
Locale Reference	S46.TRACON
State Reference	WA
Environment
Light	Daylight
Aircraft 1
Make Model Name	Light Sport Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Electronic Flt Bag (EFB)
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Flight Engineer
Experience	Flight Crew Last 90 Days 125 Flight Crew Total 33000 Flight Crew Type 300
Events
Anomaly	Aircraft Equipment Problem Less Severe Airspace Violation All Types Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

Prepped for a short flight to tdo; approx 55 nm. Plugged route into foreflight on my ipad. Route came up clean; I saw no tfrs. I did this as engine was warming up. After runup; departed and climbed rapidly to 2;800 feet to stay below the floor of class B airspace. Leveled; set cruise; glanced at my ipad; and to my shock and horror found myself inside a firefighting tfr; and 200 feet into the ceiling of it!! I promptly turned away and exited it; continued on to tdo. That tfr was not on my ipad screen when I began my takeoff roll. It either was transmitted shortly after my takeoff; or there was some kind of snag with foreflight in the download. I don't know. The foreflight tfr has always been prompt and accurate for me in the past. Upon my return; 3 hours later; the tfr was on screen the moment it came up to speed.

Original NASA ASRS Text

Title: A light aircraft pilot reported a TFR incursion when ForeFlight was slow to display the TFR.

Narrative: Prepped for a short flight to TDO; approx 55 nm. Plugged route into Foreflight on my iPad. Route came up CLEAN; I saw no TFRs. I did this as engine was warming up. After runup; departed and climbed rapidly to 2;800 feet to stay below the floor of Class B airspace. Leveled; set cruise; glanced at my iPad; and to my shock and horror found myself inside a firefighting TFR; and 200 feet into the ceiling of it!! I promptly turned away and exited it; continued on to TDO. THAT TFR WAS NOT ON MY IPAD SCREEN WHEN I BEGAN MY TAKEOFF ROLL. It either was transmitted shortly after my takeoff; OR there was some kind of snag with Foreflight in the download. I don't know. The Foreflight TFR has always been prompt and accurate for me in the past. Upon my return; 3 hours later; the TFR was on screen the moment it came up to speed.

Data retrieved from NASA's ASRS site 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.