AWH 3-29

Chapter 3, Overview of Aviation Weather Information 3-29 Surface IFR Information Contained In: Type Summary MIS T A nontechnical discussion of meteorological events (including surface IFR) causing or expecting to impact the flow of air traffic across an ARTCC. Tools GFA Tool G Interactive website that includes observed and forecast IFR, including AIRMET for IFR. Flight Service Interactive Map G Interactive website that includes METAR and TAF station plots depicting surface-based IFR conditions. AIRMETs for IFR are also shown. 3.4.2.15 Products with Surface-Based MVFR Information MVFR is a Weather Flight Category. While the “R” in the acronym means “rules,” there are no 14 CFR part 91 MVFR weather minimums. The MVFR weather category is defined as ceilings from 1,000 ft to and including 3,000 ft (AGL), and/or surface visibilities from 3 SM to and including 5 SM. Table 3-18. Surface MVFR Type: text (T), graphic (G), image (I), voice (V) Surface MVFR Information Contained In: Type Summary Observations METAR and SPECI (ASOS, AWOS, ATIS) T, G, V Ceiling 1,000 ft to 3,000 ft (inclusive) and/or visibility 3 SM to 5 SM (inclusive). Graphical depictions may provide color-coded flight categories, including MVFR. Analysis Advisories Forecasts TAF T, G Ceiling 1,000 ft to 3,000 ft (inclusive) and/or visibility 3 SM to 5 SM (inclusive). Graphical depictions may provide color-coded MVFR flight categories for the TAF. Alaska Area Forecast T A 12- to 18-hour categorical outlook for MVFR is included in the description of significant clouds and weather. Hawaii Area Forecast T A 12- to 18-hour categorical outlook for MVFR is included in the description of significant clouds and weather. Gulf of America and Caribbean Area Forecast T A 12- to 24-hour categorical outlook for MVFR is included in the description of significant clouds and weather. Low-Level SIGWX G Areas of forecast MVFR conditions are depicted. Alaska SIGWX G Areas of forecast MVFR conditions are depicted. AFD T Describes weather conditions such as surface MVFR as they relate to the TAF and provide additional aviation weather-related issues. Tools GFA Tool G Interactive website that includes observed and forecast MVFR. Flight Service Interactive Map G Interactive website that includes METAR and TAF station plots depicting MVFR conditions.