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AIM 

7/16/20 

TBL 7

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FIS

B Over UAT Product Update and Transmission Intervals 

Product 

Update Interval

Transmission 

Interval (95%)

Basic 

Product 

AIRMET 

As Available 

5 minutes 

Yes 

AWW/WW 

As Available, then at 15 minute 
intervals for 1 hour 

5 minutes 

No 

Ceiling 

As Available 

10 minutes 

No 

Convective SIGMET 

As Available, then at 15 minute 
intervals for 1 hour 

5 minutes 

Yes 

D

ATIS 

As Available 

1 minute 

No 

Echo Top 

5 minutes 

5 minutes 

No 

METAR/SPECI 

1 minute (where available), As 
Available otherwise 

5 minutes 

Yes 

MRMS NEXRAD (CONUS) 

2 minutes 

15 minutes 

Yes 

MRMS NEXRAD (Regional) 

2 minutes 

2.5 minutes 

Yes 

NOTAMs

D/FDC 

As Available 

10 minutes 

Yes 

NOTAMs

TFR 

As Available 

10 minutes 

Yes 

PIREP 

As Available 

10 minutes 

Yes 

SIGMET 

As Available, then at 15 minute 
intervals for 1 hour 

5 minutes 

Yes 

SUA Status 

As Available 

10 minutes 

Yes 

TAF/AMEND 

6 Hours (

±

15 minutes) 

10 minutes 

Yes 

Temperature Aloft 

12 Hours (

±

15 minutes) 

10 minutes 

Yes 

TWIP 

As Available 

1 minute 

No 

Winds aloft 

12 Hours (

±

15 minutes) 

10 minutes 

Yes 

Lightning strikes 

5 minutes 

5 minutes 

Yes 

Turbulence 

1 minute 

15 minutes 

Yes 

Icing, Forecast Potential (FIP) 

60 minutes 

15 minutes 

Yes 

Cloud tops 

30 minutes 

15 minutes 

Yes 

1 Minute AWOS 

1 minute 

10 minutes 

No 

Graphical

AIRMET 

As Available 

5 minutes 

Yes 

Center Weather Advisory (CWA) 

As Available 

10 minutes 

Yes 

Temporary Restricted Areas (TRA) 

As Available 

10 minutes 

Yes 

Temporary Military Operations Areas 
(TMOA) 

As Available 

10 minutes 

Yes 

The Update Interval is the rate at which the product data is available from the source. 

2

 The Transmission Interval is the amount of time within which a new or updated product transmission must be completed 

(95%) and the rate or repetition interval at which the product is rebroadcast (95%). 

3

 The transmission and update intervals for the expanded set of basic meteorological products may be adjusted based on FAA 

and vendor agreement on the final product formats and performance requirements. 

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Meteorology