FAAO 7900.5 PDF

FAA Form , Directive Feedback Information, is available for this Well, they might have that corrected when the Z is released. Find the most up-to-date version of FAA at Engineering Find the most up-to-date version of FO JO D at Engineering

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Gloomy Weather 11 2. The relevant paragraph states:.

NWS Observation Forms, Documents and Links

The manned stations with control zones also provided “airport advisory service” monitoring traffic on In a February 7 article “A likely record, but experts will get back to fzao Frank Roylance wrote: The weather observers at BWI have a combined experience on the job of well over years of service with some of the individual observers having worked more than 30 years in the field.

IAD had 20 inches 79000.5 snowfall and had a snow depth of 21 inches of snow on the ground after the storm. Sign up using Email and Password. If you wish to see it, please email wxobservers yahoo.

Sun mischaracterizes snow measurement protocol

The relevant paragraph states: Our company employs the weather observers at BWI. 7900.5 Showalter 21 1. Email Required, but never shown. Services at in weather observation.

According to AJT, the yearly updates have been discontinued without giving any reason that we are aware of. Home Questions Tags Users Unanswered. Moreover, the FAA requires observers to keep track of the snow increasing every hour and requires hourly measurements.

Service Level A covers major aviation observation. You’d provide your position information to the weather station person, calling out “radio, N is 10 miles out Aviation Stack Exchange works best with JavaScript enabled. The Service Level C in order to enhance air traffic control term “Service Standards” refers to the level of detail efficiency and increase system capacity.


Service Level A, the highest and most 2. In fact, the FAA manual In a February 7 article “A likely record, but experts will get back to us” Frank Roylance wrote:. In fact even the NWS in its snow training program declares that during windy conditions snow must be measured more often to compensate for wind loss. Post as a guest Name. They had 1 inch of snow on the ground before the storm, a net gain of 20 inches. Given their geographic proximity, the snow they reported to have fallen at each location seem to coincide.

The FAA manual These workers know well the correct procedures to follow regarding snow measurement and followed them during the time period in question. These are replaced with automated stations, and where there used to be control zones, Class E now extends to the surface in a keyhole shape protecting approach zones.

Sign up using Facebook. The second category, known as Service Level C, consists of all the elements of Service Level D, in addition to a human observer, who adds information to the automated observation. The weather observers use panels of wood or plastic called snow boards on which snow accumulates to do their measurements. This service is provided by air traffic controllers under the Limited Aviation f. There is no further guidance given in the FAA manual Specific observational elements locations, FSS observers.

Where to find US airport weather Service Levels? – Aviation Stack Exchange

For background, the FAA has determined Service Standards to categorize the levels of detail in weather observation sites. The highest category, referred to as Service Level A, includes major aviation hubs and high traffic volume airports with average or worse weather.


This is referred to as “augmentation. Service Level D defines the minimum Service Level C, plus augmentation of additional data acceptable level of service. The totals at IAD which indicate that they added 20 inches of snow depth for 20 inches of snowfall seem much more consistent than the NWS Sterling that reported 32 inches of snowfall but only an increase of snow depth of 21 inches. Those rules say the observer must allow snow to fall on an official ‘snow board’ 79900.5 six hours, then wipe it clear and repeat the procedure every six hours until the snow ends.

It is therefore inaccurate to claim that in every instance the NWS policy states that snow must be measured only every six hours.

The guidance is provided in the FAA publication The service standards consist these airports are typically provided by contract of four different levels of service A, B, C, and D as weather observers, NWS observers, and, at some described below. Where can I find an airport’s level of service for weather services? This statement is inaccurate and misleading in that it gives the impression that the weather observers contractors at Baltimore-Washington Thurgood Marshall Airport did not accurately perform their job in measuring snowfall.

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