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WEATHER CHARTS. WEATHER CHARTS T L O Enabling Learning Objective (ELO) A Action: The student will interpret the information contained in a surface.

Published byMildred Porter Modified over 9 years ago

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Presentation on theme: "WEATHER CHARTS. WEATHER CHARTS T L O Enabling Learning Objective (ELO) A Action: The student will interpret the information contained in a surface."— Presentation transcript:

1

2 WEATHER CHARTS

3 T L O

4 Enabling Learning Objective (ELO) A
Action: The student will interpret the information contained in a surface analysis chart. Condition: Given pertinent information about surface analysis charts. Standard: IAW AC 00-45G

5 SURFACE ANALYSIS CHART
PURPOSE.... TO PROVIDE THE PILOT WITH A GENERAL PICTURE OF THE WEATHER AT A SPECIFIC TIME

6 SURFACE ANALYSIS CHART
Chart is issued every 3 hours Information taken from METAR reports

7 CONDITIONS DETERMINED FROM CHART
1. SURFACE WINDS 2. FRONTAL SYSTEMS 3. PRESSURE SYSTEMS 4. SKY COVERAGE 5. TEMPERATURE AND DEW POINT PRECIPITATION AND OBSCURATIONS STATION PRESSURE (corrected for sea level)

8 , METAR KATL 151450Z 28025KT 4SM DZFG SCT014 BKN120 OVC300 15/13
315 METAR KATL Z KT 4SM DZFG SCT014 BKN120 OVC /13 A3049 RMK SLP315

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

10 WIND DIRECTION

11 CALM 05 KNOTS 10 KNOTS WIND SPEED 15 KNOTS 20 KNOTS 50 KNOTS 65 KNOTS

12 TEMPERATURE 15 13 , 315

13 WEATHER & OBSCURATION , 315 15 13

14 RAIN

15

16 RAIN HAIL SHOWER DRIZZLE RAIN SHOWER SNOW ICE PELLETS SNOW SHOWER

17 T/STORM FOG SMOKE FREEZING DRIZZLE FREEZING RAIN HAZE

18 15 13 , 315 DEWPOINT

19 STATION PRESSURE 15 13 , 315

20 1. STATION PRESSURE CORRECTED TO
SEA LEVEL 2. SHOWN IN HECTOPASCALS / MILLIBARS = 132 986.6 = 866

21 , PRESSURE TENDENCY (3 HOUR) 1031.5 - .6 1030.9 3 hours ago 315 15 13
1030.9 3 hours ago PRESSURE TENDENCY (3 HOUR)

22 , = 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 =

23 , 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 = PRESSURE 3 HOURS AGO

24 , 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 = PRESSURE 3 HOURS AGO

25 , 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

26 , 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

27 , 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

28 , 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

29 , 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

30 , 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

31 L H t o L Indicated True H

32

33 L H IND TRUE H L L H

34 Break Time Countdown

35 Enabling Learning Objective (ELO) B
Action: The student will interpret data contained in a weather depiction chart. Condition: Given pertinent information about weather depiction charts. Standard: IAW AC 00-45G

36 WEATHER DEPICTION CHART

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

38 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

39 SKY CLEAR OVC FEW BINOVC SCT OBSCURATION MISSING DATA BKN

40 SKY CLEAR OVC FEW BINOVC SCT OBSCURATION MISSING DATA BKN

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

42 NO VISIBILITY SHOWN MEANS VISIBILITY IS GREATER THAN 5 SM

43 WEATHER AND OBSTRUCTIONS
‚ 4

44 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.

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

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

47 Using the summation method
W.D. S.A. Using the summation method 020 SCT010 BKN020 OVC030

48 W.D. S.A. FEW010 FEW020 SCT030

49 AREAS DEPICTED VFR MVFR IFR
CEILING AND VISIBILITY GREATER THAN VFR To MVFR CEILING AND / OR VISIBILITY LESS THAN IFR

50

51 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

52

53

54 , , W.D. S.A. METAR KATL 151450Z 28025KT 4SM DZFG
315 15 4 13 120 METAR KATL Z KT 4SM DZFG SCT014 BKN120 OVC /13 A3049 RMK SLP315

55 Enabling Learning Objective (ELO) C
Action: The student will interpret the information contained on a Radar Summary Chart. Condition: Given pertinent information about radar summary charts. Standard: Technical Information Notice NWS (Effective 11 June 3012)

56 RADAR SUMMARY

57 Radar Summary Chart Shows intensity, coverage, tops, and movement of precipitation Creates gives a three-dimensional viewpoint of precipitation

58 (15 and 45 minutes of the hour)
Radar Summary Chart Issued twice per hour (15 and 45 minutes of the hour)

59

60

61 Intensity measured in decibels (dBZ)
light green to purple dBZ Nondimensional "unit" of radar reflectivity which represents a logarithmic power ratio (in decibels, or dB) with respect to radar reflectivity factor, Z.

62 Wind barbs show direction the cell is moving FROM
“FROM the NE at 15 kts”

63 Tops of echoes are labeled in hundreds of feet in bold black numbers
“Tops at 57,000 ft”

64 End of SU5: Weather Charts

65

66 CONTOURS AT LEVELS 1, 2, AND 3. 3 Extreme 2 Heavy 1 Light to Moderate

67

68 Maximum echo top does not equal maximum cloud top
TOPS OF ECHO Maximum echo top does not equal maximum cloud top 450

69 CELL MOVEMENT 30 Area/Line Movement

70

71

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

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

74

75

76

77

78

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

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

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

82 That’s All Folks!

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