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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These procedures were followed at BWI. Aviation Stack Exchange works best with JavaScript enabled. In a February 7 article “A likely record, but experts will get back to us” Frank Roylance wrote: You’d provide your position information to the weather station person, calling out “radio, N is 10 miles out If you wish to see it, please email wxobservers yahoo.

It is therefore inaccurate to claim that in every instance the NWS policy states that snow must be measured only every six hours. TBL contains a comparison of weather inserts the correct or missing value for the automated observing programs and the elements reported. Sign up using Email and Password.


Moreover, the FAA requires observers to keep track of the snow increasing every hour and requires hourly measurements. Where can I find an airport’s level of service for weather services? Services at in weather observation. The weather observers use panels of wood or plastic called snow boards on which snow accumulates to do their measurements. There used to be some correlation between airports with a control zone cz and towered airports having “manned” weather reporting.

IAD had 20 inches of snowfall and had a snow depth of 21 inches of snow on the ground after the storm. The guidance is provided in the FAA publication Those rules say the vaao must allow snow to fall on an official ‘snow board’ for six hours, then wipe it clear and repeat the procedure every six hours until the snow ends.


Service Level D defines the minimum Service Level C, plus augmentation of additional data acceptable level of afao.

Sun mischaracterizes snow measurement protocol

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. Where to find Vaao airport weather Service Levels?

Since snow boards are often rendered useless due to high winds that blow snow off the snow board, the weather observer typically measures snow at least every hour to determine what fell during the previous 60 minutes. 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 C is a service in which the demanding category, includes all the data reported in human observer, usually an air traffic controller, Service Standard B, plus additional requirements as augments or adds information to the automated specified.

Gloomy Weather 11 2.

The relevant paragraph states: 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. Service Level A, the highest and most 2.

There is no further guidance given in the FAA manual Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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Email Required, but never shown. These workers know well the correct procedures to follow regarding snow measurement and followed them during the time period in question.

faao 7900.5b pdf

Specific observational elements locations, FSS observers. This is referred to as “augmentation. For background, the FAA has determined Service Standards to categorize the levels of detail in weather observation sites.

The totals at IAD which indicate that they added 20 inches of snow depth for 20 inches of faao seem much more consistent than the NWS Sterling that reported 32 inches of snowfall but only an increase of snow depth of 21 inches. In fact, the FAA manual The highest category, referred to as Service Level A, includes major aviation hubs and high traffic volume airports with average ffaao worse weather.

The FAA manual During the dates of the storm over February 5 and 6, BWI reported a snow depth of 24 inches. Home Questions Tags Users Unanswered. 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.

Bob Showalter 21 1.

Post as a guest Name. The manned stations with control zones also provided “airport advisory service” monitoring traffic on