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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Those rules say the observer 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. They had 1 inch of snow on the ground before the fwao, a net gain of 20 inches. Service Level A faaao major aviation observation.

The weather observers use panels of wood or plastic called snow boards on which snow accumulates to do their measurements.

Sun mischaracterizes snow measurement protocol

Aviation Stack Exchange works best with JavaScript enabled. This is referred to as “augmentation. 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.

Gloomy Weather 11 2. Email Required, but never shown. Sign up using Facebook. Where can I find an airport’s level 7900. service for weather services? Bob Showalter 21 1. The FAA manual Our company employs the weather observers at BWI. There is no further guidance given in the FAA manual These workers know well the correct procedures to follow regarding snow measurement and followed them during the time period in question.

Service Level A, the highest and most 2. Post as a guest Name. For background, the FAA has determined Service Standards to categorize the levels of detail in weather observation sites. 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 afao Sign up or log in Sign up using Google. Given their geographic proximity, the snow they reported to have fallen at each location seem to coincide.


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 relevant paragraph taao. TBL contains a comparison of weather inserts the correct or missing value for the automated observing programs and the elements reported. In a February 7 article “A likely record, but experts will get back to us” Frank Roylance wrote:.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyfaaoo our Terms of Service. The relevant paragraph states: You’d provide your position information to the weather station person, calling out “radio, N is 10 miles out In a February 7 article “A likely record, but experts will get back to us” Frank Roylance wrote: Service Level D defines the minimum Service Level C, plus augmentation of additional data faao level of service.

The second category, known as Service Level C, consists of all the elements of Service Level Faa, in addition to a human observer, who adds information to the automated observation. These procedures were followed at BWI.

NWS Observation Forms, Documents and Links

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.

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. 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. 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.


Services at in weather observation.

Where to find US airport weather Service Levels? The manned stations with control zones also provided “airport advisory service” monitoring traffic on 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. This service is provided by air traffic controllers under the Limited Aviation f.

In fact, the FAA manual There used to be some correlation between airports with a control zone cz and towered airports having “manned” weather reporting.

During the dates of the storm over February 5 and 6, BWI reported a snow depth of 24 inches. This statement is inaccurate and misleading in that it 7090.5 the impression that the weather observers contractors at Baltimore-Washington Thurgood Marshall Airport did not accurately perform their job in measuring snowfall. Last “published” report was Moreover, the FAA requires observers to keep track of the snow increasing every hour and requires hourly measurements.