Property of Lear Siegler

WEATHER CHARTS Property of Lear Siegler

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ELO 1 Action: The student will interpret the information contained in a surface analysis chart. Condition: Given pertinent information about surface analysis charts. Standard: IAW AC 00-45F

SURFACE ANALYSIS CHART PURPOSE.... TO PROVIDE THE PILOT WITH A GENERAL PICTURE OF THE WEATHER AT A SPECIFIC TIME Property of Lear Siegler

Chart is issued every 3 hours Information taken from METAR reports

CONDITIONS DETERMINED FROM CHART 1. SURFACE WINDS 2. FRONTAL SYSTEMS 3. PRESSURE SYSTEMS 4. SKY COVERAGE 5. TEMPERATURE AND DEW POINT 6. PRECIPITATION AND OBSCURATIONS 7. STATION PRESSURE 8. PRESSURE TREND (3 Hour) Property of Lear Siegler

, METAR KATL 151450Z 28025KT 4SM DZFG SCT014 BKN120 OVC300 15/13 6 315 METAR KATL 151450Z 28025KT 4SM DZFG SCT014 BKN120 OVC300 15/13 A3049 RMK SLP315 Property of Lear Siegler

OVERCAST (8 octas) CLEAR FEW (1-2 octas) OBSCURED SCATTERED SKY COVER MISSING BROKEN (5-7 octas) REF: AC 00-45F

SKY CLEAR OVC 8 FEW 1 - 2 BINOVC SCT 3 - 4 OBSCURATION MISSING DATA BKN 5 - 7

WIND DIRECTION Property of Lear Siegler

WIND SPEED CALM 05 KNOTS 10 KNOTS 15 KNOTS 20 KNOTS 50 KNOTS 65 KNOTS Property of Lear Siegler

TEMPERATURE 15 13 , 6 315 Property of Lear Siegler

WEATHER & OBSCURATION , 315 15 13 6 Property of Lear Siegler

RAIN Property of Lear Siegler

RAIN HAIL SHOWER DRIZZLE RAIN SHOWER SNOW ICE PELLETS SNOW SHOWER Property of Lear Siegler

T/STORM FOG SMOKE FREEZING DRIZZLE FREEZING HAZE RAIN Property of Lear Siegler

15 13 , 6 315 DEWPOINT Property of Lear Siegler

STATION PRESSURE 15 13 , 6 315 Property of Lear Siegler

1. STATION PRESSURE CORRECTED TO SEA LEVEL 2. SHOWN IN HECTOPASCALS / MILLIBARS 1013.2 = 132 986.6 = 866 Property of Lear Siegler

, PRESSURE TENDENCY (3 HOUR) 1031.5 - .6 1030.9 3 hours ago 315 15 13 - .6 1030.9 3 hours ago PRESSURE TENDENCY (3 HOUR) Property of Lear Siegler

, = 1009.3 CURRENT STATION PRESSURE = 1010.1 INCREASING 15 13 , 8 101 CURRENT STATION PRESSURE = 1010.1 INCREASING PRESSURE TREND = PRESSURE 3 HOURS AGO 1010.1 - 0.8 = 1009.3 Property of Lear Siegler

, CURRENT STATION PRESSURE = 1010.0 DECREASING PRESSURE TREND = 1010.0 100 15 13 12 CURRENT STATION PRESSURE = 1010.0 DECREASING PRESSURE TREND = 1010.0 + 1.2 = 1011.2 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 998.2 INCREASE THEN PRESSURE TREND = 15 13 , 3 982 CURRENT STATION PRESSURE = 998.2 INCREASE THEN STEADY PRESSURE TREND = 998.2 - 0.3 = 997.9 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1016.0 DECREASE THEN PRESSURE TREND = 160 15 13 24 CURRENT STATION PRESSURE = 1016.0 DECREASE THEN STEADY PRESSURE TREND = 1016.0 +2.4 =1018.4 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1017.4 DECREASE THEN PRESSURE TREND = 174 15 13 15 CURRENT STATION PRESSURE = 1017.4 DECREASE THEN INCREASE PRESSURE TREND = 1017.4 +1.5 =1018.9 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1014.2 INCREASE THEN PRESSURE TREND = 142 15 13 15 CURRENT STATION PRESSURE = 1014.2 INCREASE THEN DECREASE PRESSURE TREND = 1014.2 -1.5 =1012.7 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1014.2 STEADY PRESSURE TREND = 1014.2 142 15 13 CURRENT STATION PRESSURE = 1014.2 STEADY PRESSURE TREND = 1014.2 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1014.2 INCREASE THEN PRESSURE TREND = 142 15 13 CURRENT STATION PRESSURE = 1014.2 INCREASE THEN DECREASE PRESSURE TREND = 1014.2 PRESSURE 3 HOURS AGO Property of Lear Siegler

, CURRENT STATION PRESSURE = 1014.2 DECREASE THEN PRESSURE TREND = 142 15 13 CURRENT STATION PRESSURE = 1014.2 DECREASE THEN INCREASE PRESSURE TREND = 1014.2 PRESSURE 3 HOURS AGO Property of Lear Siegler

L H to L Indicated True H Property of Lear Siegler

Property of Lear Siegler

L H IND TRUE H L L H

Break Time Countdown

ELO 2 Action: The student will interpret data contained in a weather depiction chart. Condition: Given pertinent information about weather depiction charts. Standard: IAW AC 00-45F

WEATHER DEPICTION CHART Property of Lear Siegler

WEATHER DEPICTION CHART PURPOSE - To portray areas of IFR, VFR and MVFR FREQUENCY - Issued every 3 hours Property of Lear Siegler

OVERCAST (8 octas) CLEAR FEW (1-2 octas) OBSCURED SCATTERED SKY COVER MISSING OR PARTIAL OBSCURATION BROKEN (5-7 octas) BREAKS IN OVERCAST REF: AC 00-45F

The altitude below the station will show the ceiling. Sky cover symbols shown on the weather depiction chart are the worst sky conditions (summation method) for that station. The altitude below the station will show the ceiling.

SKY CLEAR OVC FEW BINOVC SCT OBSCURATION MISSING DATA BKN

SKY CLEAR OVC FEW BINOVC SCT OBSCURATION MISSING DATA BKN

ONLY SHOWN WHEN 5 SM OR LESS VISIBILITY ONLY SHOWN WHEN 5 SM OR LESS ‚ 4

NO VISIBILITY SHOWN MEANS VISIBILITY IS GREATER THAN 5 SM Property of Lear Siegler

WEATHER AND OBSTRUCTIONS ‚ 4 Property of Lear Siegler

‚ CLOUD BASE 4 No altitude will be given if FEW or SCT. If BKN or OVC, height is ceiling. ‚ 4 Property of Lear Siegler

‚ CLOUD BASE 4 5 No altitude will be given if FEW or SCT. If BKN or OVC, height is ceiling. ‚ 4 5 Property of Lear Siegler

Using the summation method W.D. S.A. Using the summation method 020 SCT010 BKN020 OVC030 Property of Lear Siegler

W.D. S.A. FEW010 FEW020 SCT030 Property of Lear Siegler

AREAS DEPICTED VFR MVFR IFR CEILING AND VISIBILITY GREATER THAN 3000 -- 5 VFR 3000 -- 5 To 1000 -- 3 MVFR CEILING AND / OR VISIBILITY LESS THAN 1000 -- 3 IFR Property of Lear Siegler

SHADED AREAS … IFR WITH CIG LESS THAN 1000 FT AND/OR VSBY LESS THAN 3 MI CONTOURED WITHOUT SHADING…MVFR AREAS WITH CIG GREATER THAN OR EQUAL TO 1000 TO LESS THAN OR EQUAL TO 3000 FT AND/OR VSBY GREATER THAN OR EQUAL TO 3 TO LESS THAN OR EQUAL TO 5 MI NO CONTOURS… VFR AREAS WITH CIG GREATER THAN 3000 FT AND VSBY GREATER THAN 5 MI Property of Lear Siegler

Property of Lear Siegler

, , W.D. S.A. METAR KATL 151450Z 28025KT 4SM DZFG 315 15 4 13 6 120 METAR KATL 151450Z 28025KT 4SM DZFG SCT014 BKN120 OVC300 15/13 A3049 RMK SLP315 Property of Lear Siegler

ELO 3 Action: The student will interpret the information contained on a radar summary chart. Condition: Given pertinent information about radar summary charts. Standard: IAW AC 00-45F

RADAR SUMMARY

Gives a three-dimensional viewpoint of clouds and precipitation Radar Summary Chart Gives a three-dimensional viewpoint of clouds and precipitation Issued every hour

Property of Lear Siegler

CONTOURS AT LEVELS 1, 3, AND 5. 5 3 1 Intense to Extreme Heavy to Very Heavy 1 Light to Moderate Property of Lear Siegler

Maximum echo top does not equal maximum cloud top TOPS OF ECHO Maximum echo top does not equal maximum cloud top 450 Property of Lear Siegler

CELL MOVEMENT 30 Area/Line Movement Property of Lear Siegler

Property of Lear Siegler

Symbol Meaning R Rain RW Rain Shower S Snow SW Snow Shower T Thunderstorm NE No Echoes NA Not Available OM Out for Maintenance Property of Lear Siegler

Line of Echoes – Solid (SLD) WS999 Severe Thunderstorm WT999 Tornado Watch HOOK Hook Echo Severe weather watch area Property of Lear Siegler

Property of Lear Siegler

They’re worse! Thunderstorms are not as bad Safety First… Thunderstorms are not as bad as they look on the outside…. They’re worse!

FM 1-230 References for today Surface Analysis Chart 18-4 Weather Depiction Chart 18-5 Radar Summary 18-8

FM 1-230 References for tomorrow… TAF App B-11 Winds Aloft Chart 18-10

That’s All Folks!