AEROGRAPHER'S MATE 3 & 2 



WEATHER BROADCASTS TO 

 OPERATING FORCES 



Most of the environmental support routinely 

 required by fleet units is available on a reg- 

 ularly scheduled basis via normal Navy Com- 

 munications channels. Support services tailored 

 for specific operations are also available to ships 

 at sea upon request to the cognizant central/ 

 facility. 



Weather information is broadcast by Con- 

 tinuous Wave (CW), radioteletype (RATT), and 

 radio facsimile. Schedules and frequencies are 

 published in the Codes Manual, NAVAIR 50- 

 1P-11; JANAP 195; and the Worldwide Marine 

 Weather Broadcasts manual. 



The following environmental products are 

 routinely available to fleet units: 



1. Wind warnings (oceanic areas). 



2. High sea warnings. 



3. Small craft warnings (harbor). 



4. Storm surge (tidal) warnings (harbor). 



5. Fleet operating area forecasts. 



6. Area analyses and prognostic charts (me- 

 teorological and oceanographic). 



7. Nuclear fallout warning/preburst predic- 

 tion (provided when required). 



8. Aviation weather (air stations and routes). 



9. Local severe weather. 



10. Satellite cloud photography (neph- analyses 

 or photographs). 



Additional information concerning weather 

 warnings is provided by OPNAVINST 3140. 24( ), 

 NWP 50, various directives of the 3140- and 

 5400-series, SO PA instructions, and pertinent 

 operation orders. 



LOCAL METEOROLOGICAL 

 SERVICES 



Local Forecasts and Outlook 



Local forecasts are intended for the use 

 of ship or station personnel in planning local 

 operations. They should contain a brief narra- 

 tive summary of the major weather features 

 that could be of interest to local recipients of 

 the forecast. In addition, a general synopsis of 



expected developments for the local area during 

 the forecast period should be included. De- 

 tailed forecasts of those elements of concern to 

 the recipients of the forecasts (such as flying 

 conditions, surface and upper winds, maximum 

 and minimum temperatures, precipitation, icing, 

 sea conditions, ceiling, visibility, and turbu- 

 lence) should be included by periods as required 

 locally. Include an outlook, if appropriate. 



Due to varied requirements of ships and 

 stations a standard form r or local forecasts 

 is not prescribed. Locally designed forms may 

 be used. 



The times at which local forecasts are is- 

 sued are determined on the basis of the need 

 for local operations. 



Weather Services to Aviation 



Routine weather services 

 into the following categories: 



to aviation fall 



1. Area forecasts. 



2. Route forecasts. 



3. Flight forecasts. 



4. Terminal forecasts. 



5. Weather briefing for flight clearance. 



6. Flight documents. 



7. Inflight weather services. 



AREA FORECASTS FOR AVIATION. — Area 

 forecasts for aviation refer to weather condi- 

 tions for a given period within a specified area 

 without reference to a particular flight or route. 

 These forecasts are not provided routinely by 

 Naval Weather Service units but may be re- 

 quired by appropriate commanders concerned 

 with aircraft operations. 



Area forecasts for aviation should be in 

 plain language, utilizing appropriate ICAO 

 phraseology. These forecasts are issued at such 

 intervals as required. No format is prescribed 

 but normally the area forecast contains the 

 following information: 



1. Area of coverage. 



2. General description of the prognostic sit- 

 uation. 



3. Clouds and weather. 



4. Icing. 



5. Turbulence. 



6. Upper winds. 



7. Outlook. 



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