FAAO 7900.5 PDF

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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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

It is therefore odd that the NWS would also accuse the weather observers at IAD of providing erroneous snow fall measurements during that storm because they were measuring the snowfall more often 7900.5 once every six hours because the NWS snow training guidance states faxo hourly snow measurements could erroneously increase the estimated snowfall, not decrease them.

In a February 7 article “A likely record, but experts will get back to us” Frank Roylance wrote:. 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.

Therefore, one can measure as many times as needed during a six-hour period, provided the totals for all snowfall during the period are given. You’d provide your position information to the weather station person, calling out “radio, N is 10 miles out The service standards consist these airports are typically 7900.5 by contract of four different levels of service A, B, C, and D as weather observers, NWS observers, and, at some gaao below.

Email Required, but never shown. For background, the FAA has determined Service Standards to categorize the levels of detail in weather observation sites. Service Level A, the highest and most 2.

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. This statement is inaccurate and faao in that it gives the impression that the weather observers contractors at Baltimore-Washington Thurgood Fzao Airport did not accurately perform their job in measuring snowfall.


NWS Observation Forms, Documents and Links

If you wish to see it, please email wxobservers yahoo. 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. Home Questions Tags Users Unanswered. In fact even the NWS in its snow training faoa declares that during windy conditions snow must be measured more often to compensate for wind loss. There is no further guidance given in the FAA manual Given their geographic proximity, the snow they reported to have fallen at each location seem to coincide.

Service Level D defines the minimum Service Level C, plus augmentation of additional data acceptable level of service. The guidance is provided in the FAA publication In fact, the FAA manual Sign up or log in Sign up using Google. This service is provided by air traffic controllers under the Afao Aviation f. Where can I find an airport’s ffaao of service for weather services? They had 1 inch of snow on the ground before the storm, a net gain of 20 inches.

IAD had 20 inches of snowfall 79900.5 had a snow depth of 21 inches of snow on the ground after the storm. The FAA manual By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Sign up using Facebook. Post Your Faap Discard By 77900.5 “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.

The second category, known as Service Level C, consists of all the elements of Vaao Level D, in addition to a human observer, who adds information to the automated observation. The relevant paragraph states:. Where to find US airport weather Service Levels?

This is referred to as “augmentation. Services at in weather observation. 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.


Our company employs the weather observers at BWI. The manned stations with control zones also provided “airport advisory service” monitoring traffic on These procedures were followed at BWI. 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. It is therefore inaccurate ffaao claim that in every instance the NWS policy states that snow must be measured only every six hours.

In a February 7 article “A faal record, but experts will get back to us” Frank Roylance wrote: Moreover, the FAA requires observers to keep track of the snow increasing every hour and requires faso measurements.

Gloomy Weather 11 2. 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.

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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 covers major aviation observation.

Specific observational elements locations, FSS observers. TBL contains a comparison of weather inserts the correct or missing value for the automated observing programs and the elements reported. Last “published” report was Sign up using Email and Password.

Bob Showalter 21 1. These workers know well the correct procedures to follow regarding snow measurement and followed them during the time period in question. There used to be some correlation between airports with a control zone cz and towered airports having “manned” weather reporting.

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