"WEATHER CHARTS SURFACE ANALYSIS OBSERVED EVERY HRS CHART NAME"
WEATHER CHARTS CONSTANT COMPOSITE WINDS AND SURFACE WEATHER RADAR PRESSURE MOISTURE TEMPS LLVL SIG WX HLVL SIG WX CONVECTIVE CHART NAME ANALYSIS DEPICTION SUMMARY ANALYSIS STABILITY ALOFT PROG PROG OUTLOOK OBSERVED OR FORECAST OBSERVED OBSERVED OBSERVED OBSERVED OBSERVED FORECAST FORECAST FORECAST FORECAST EVERY 3 HRS EVERY HOUR ISSUED EVERY 3 HRS FROM 0100Z FROM 0035Z EVERY 12 HRS EVERY 12 HRS EVERY 12 HRS EVERY 6 HRS EVERY 6 HRS SEE "NOTES" Locate IFR Wind direction & areas, precip. Locate: Jets, Areas which may wind speed at Areas, turbc CBs, CAT, expect general Locate upper planned flight area, fronts, TROP LVLS, TSTMS and PURPOSE (USE) Identify areas of level pressure 4 panel chart used level gives idea pressure Hurricanes, SVR areas which may precipitation & systems, winds, to locate areas of of avg enroute systems, Squall LNS, expect SVR Primarily to TSTMS. Check and fronts. Can possible TSTM WCP. Temp. inversions, and Sand/Duststorms TSTMS. locate SFC Primarily to intensity check moisture activity. To check useful for effect FRZLVLS. , fronts. Includes: SVRTS fronts & pressure locate SFC IFR coverage and and TURBC for TSTM severity on TAS & fuel SFC-400mb ~FL250 - RISK notations. systems conditions movement possibility. potential. flow. ~(24000') ~FL600 (LEVELS) FRONTS - TIC] -IFR (Shaded) PRECIPITATION CONTOURS: ISOPLETHS: 30k O C 12 - hr 24 - hr INTENSITIES: 900 -4 SFC - 400mb SFC - 400mb (To the right of line -MVFR (Contoured with L 100 FL35 100 80k is general TSTM Lines of an equal value. In this case 3 shading) - 50 or 50 * 80k CAT 360 activity forecasted. 912 "LI " LI > O -VFR (Everything else) 12 - hr 24 - hr 300 WINDS PARALLEL and increase SFC SFC -[Know definitions!] when? LI < O 0 _ 3 _ = DIRECTION -V-V-V-V SVR SQUALLN SEVERE TSTM areas are: -Fronts/Trofs ISOTACHS: PLOTS: Upper panels have a Legend: PRESSURE - 1010 KNOW: LGT - MDT CBs: ISOL Shaded DEPICTS 12 STG - V.S. -10 LI BAD O O 1 IFR ( < 1/8 ) or OCNL . 10 int. - XTRM 45 KI DAY L 1014 10k 30k 2 (1/8-4/8) ) with a RISK notation in H. IFR WHAT IS ALSO REQUIRED TO 3 MVFR FRQ DETERMINE HOW? (5/8-8/8) ) the circle or near. SLD > 80% COV. TBC VFR SLD ISOTHERM 10 GOOD MVFR FRZLVL(s) -2 DAY -35 AUTO SVR ISOTACHS: Negative LIs = unstable notes: MDT TBC T.S. 1/2 Shading: 70 - 110K DAY 1 5 X DAILY 150 - 190K SVR etc. Positive LIs = stable HURRICANE VIS. TSTM* DAY 2 2 X DAILY WS 500 CLR within shading: CIG / CLD base WATCH don't COVERS (2 DAYS) 110 - 150K Positive (& high) KI = expect TROP LEVEL: WX / obs to vision WS 500 500 / YT 190 - 230K moist & unstable SVR these on MDT 450 = 45000' etc. NWS TORNADO WATCH Low (or negative) KI = ICG Charts. STATION MODELS: S * dry & stable (others - yes) TROP HIGH: 501 / YT >5sm NOTES * 400 TT HGT H Precipitation L - severity potential CALM 100 500 COLD WK tops 40000' T-D HC(LV,M) 25 MSL * 145 13 MDT K - TSTM probability TROP LOW: 22 .03 STG R S T NE Shaded black when T-D MDT TBC within the lines RW SW NA OM -8 from SFC - 10000' 300 spread is 5 degrees or less is possible! Frontal intensity given 15 cell (moist). 12 L DECODE THE STATION MODEL. [ KNOW THE UNITS! ] TEST will exclude movement ' human frontal LM=? 15K to NE VOLCANIC analysis'. shading - Precip. Cov. > AUTO ERUPTION 50%.