Aviation Sri Lanka 

Meterological Information

Prevalent and forecasted meteorological information along the flight route at the time of the aircraft's  position is very important in order to avoid weather related hazards. The following diagram shows route VCBI – EGLL, respective passing points and weather information. Weather information are in symbolic form and their meanings are discussed accordingly.  

 

Click on the diagram for a larger view  

SIGNIFICANT WEATHER USED IN FORMS

QUALIFIER

WEATHER PHENOMENA

INTENSITY OR

DESCRIPTOR

PRECIPITATION

OBSCURATION

OTHER

PROXIMITY

 

 

 

 

1

2

3

4

5

- Light

MI Shallow

DZ Drizzle

BR Mist

PO Well

 

 

 

 

Developed

 

 

 

 

Dust / Sand

 

 

 

 

Whirls

Moderate (no

BC Patch"

RA Rain

FG Fog

 

qualifier)

 

 

 

SQ Squalls

 

DR Drilling

SN Snow

FU Smoke

 

+ (Heavy)

 

 

 

 

(Well developed in the case of

 

 

 

 

Dust/sand

 

 

 

 

whirls (dust devils) and Funnel clouds)

 

 

 

FC Funnel

 

 

 

 

cloud(s)

 

BL, Blowing

SG Snow grains

VA Volcanic ash

 (tornado or

VC In the vicinity

 

 

 

waterspout.

 

 

IC Diamond dust

DU Widespread

 

 

SH Shower(s)

 

dust

SS Sandstorm

 

 

PE Ice pellets

 

 

 

 

 

 

 

 

TS Thunder-

 

SA Sand

DS Dust storm

 

storm

 

 

 

 

 

GR Hall

 

 

 

 

 

HZ Haze

 

 

FZ Super cooled

 

 

 

 

 

GS Small hail

 

 

 

 

and/or snow

 

 

 

 

pellets

 

 

 

Example

 

+ SHRA            Heavy showers of rain

            -DZFG               Light drizzle and fog

            NSC                 No Significant Clouds

            NSW                No Significant Weather

 

STANDARD HEIGHTS AND TEMPERATURES OF ISOBARIC SURFACES

 

850 hpa             4,800 It             + 100C              300 hPa            30,100 ft            - 32.0C

700 hPa             9,9M ft              + 5.5.C             250 hPa            34,000 ft            - 45.0C

500 hPa            18,3M It            -4.50 C              200 hPa            38,700 ft            - 52.0C

400 hPa            23,600 ft            - 21.0C              150 hPa,           44,600 ft            - 56.5C

 

The top most figure (flight route VCBI – EGLL) is comprised some of the weather symbols exemplified by other two diagrams. This information is collected from various sources.