Field Condition, or FICON, reports show up in NOTAMs both during the summer time and the winter time. In the southern states, FICON reports are seen more in the summertime during and after hard rains and thunderstorms. In northern states, FICON reports are seen during the winter time during and after snow storms.
The question is, what do those codes mean in the FICON report? You could see 5/5/5, 3/3/3, 3/4/4 and any combination thereof. And why are there three numbers?
Let’s start with the second question first. The three different numbers in the FICON report indicate the 3 different sections of the runway: the touchdown third, midpoint third, and rollout third of the runway.
Now, what are those numbers describing? The three numbers are the indication of how slippery that portion of the runway is. This is referred to as a Runway Condition Code (or RCC). The lower the number, the more slippery the runway is. The higher the number, the dryer the runway. The scale is 0-6, with 6 being completely dry and zero being no traction at all.
Here is the FAA table for the RCCs.
Now, in order for those RCC codes to generate, at least 25% of the surface must be wet. If there are just spots of standing water, slush or snow, a FICON report will be issued to report the contaminants, but no codes will be generated.
The Runway Condition Codes are only part of a FICON report. In addition to the codes, a descriptor in the NOTAM will be published describing what percentage of the portion of the runway is affected and by what.
For example: RWY 28 FICON 3/3/3 100 PRCNT 2IN DRY SN OVER COMPACTED SN.
Deciphered, that is saying that all sections of Runway 28 has braking deceleration that is noticeably reduced or direction control is noticeably reduced and 100% of each section has 2 inches of dry snow over compacted snow. Sounds like a runway to avoid!
Braking action reports are separate from FICON reports, but also issued via NOTAM. Braking action reports are issued by the airport manager whereas the FICON reports are computer generated.