2/14/08 JO 7110.10T
Winds and Temperature Aloft Forecast (FD) 9-4-1
Section 4. Winds and Temperature Aloft Forecast (FD)
9-4-1. GENERAL
Winds and Temperature Aloft Forecasts (FD) are
computer-prepared and issued by the NMC at
Suitland, Maryland. The forecasts are valid
6(FD1/8), 12(FD2/9), and 24(FD3/10) hours after
the observation date/times of 0000Z and 1200Z upon
which they are based. An unscheduled amendment to
an FD may be prepared and issued by a WSFO.
9-4-2. LEVELS FORECAST
Dependent upon station elevation, FD1/2/3 wind
forecasts are issued for the following levels: 3, 6, 9,
12, 18, 24, 30, 34, and 39 thousand foot levels. The
first level for which a wind forecast is issued is
1,500feet or more above the station elevation.
Temperature is forecast for all wind levels, except the
3,000 foot level, that are 2,500feet or more above the
station. The minus signs are deleted preceding the
temperatures at the 30, 34, and 39thousand foot
levels. FD8/9/10 are for the 45,000 and 53,000foot
levels. They are not normally disseminated on
ServiceA, but are available on request/reply.
9-4-3. SCHEDULES
TBL 9-4-1
Winds/Temperature Aloft Forecast Schedules
Type Base Data
Time Valid for For use (period)
FD1/8 0000Z 0600Z 0500-0900Z
FD2/9 0000Z 1200Z 0900-1800Z
FD3/10 0000Z 0000Z 1800-0500Z
FD1/8 1200Z 1800Z 1700-2100Z
FD2/9 1200Z 0000Z 2100-0600Z
FD3/10 1200Z 1200Z 0600-1700Z
9-4-4. DISTRIBUTION
All FDs are transmitted to the WMSC by NMC.
Distribution by the WMSC is accomplished in
accordance with established program requirements.
Amended FD data prepared and entered by a WSFO
is distributed to the same users as the original product
prepared by NMC.
2/14/08 JO 7110.10T
Aviation Terminal Forecast (TAF) 9-5-1
Section 5. Aviation Terminal Forecast (TAF)
9-5-1. GENERAL
Twenty-four hour Terminal Forecasts (TAFs) for
selected U.S. terminals are prepared by NWS forecast
offices and forwarded to the WMSCR for
distribution. Similar forecasts for the U.S. Military,
Canada, and Mexico are sent to WMSC from the
NMC and Air Weather Service (AWS) for
distribution.
9-5-2. TERMINAL FORECAST
SCHEDULES
TAFs are prepared four times a day and are issued at
2330, 0530, 1130, and 1730 UTC.
9-5-3. DISTRIBUTION
Distribution of TAFs is made by WMSCR in
accordance with a predetermined list for each circuit
based upon intracircuit coordinated requirements.
WMSCR Identifier Index of Individual Aviation
Weather Reports. (Use RQ Procedures.)
2/14/08 JO 7110.10T
Aviation Area Forecast (FA) 9-6-1
Section 6. Aviation Area Forecast (FA)
9-6-1. GENERAL
a. Aviation Area Forecasts (FA) are available
through the WMSC and provide an overview of
weather conditions which could impact aviation
operations. FAs are issued by the National Aviation
Weather Advisory Unit (NAWAU) in Kansas City,
Missouri, for the conterminous U.S. land and coastal
waters by areas (Pacific Coast, Rocky Mountain,
North-Central U.S., South-Central U.S., Northeast
U.S., Southeast U.S.). The areas are delineated along
state boundaries and are specified in the NWS
Operations Manual, Chapter D-20. The FAs for
Alaska and Hawaii are issued by the WSFOs located
in Anchorage, Fairbanks, and Juneau, Alaska, and
Honolulu, Hawaii. The geographical areas of
coverage for the appropriate WSFOs are specified in
Chapter D-20 of the NWS Operations Manual.
(Canadian and Mexican FAs are also available
through the WMSC.)
b. FAs consist of two sections with each section
being transmitted with a unique communications
header. This allows each section to be replaced when
needed instead of amending or correcting the affected
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