SYNOP

IMD SYNOP Code Generator

Generated SYNOP Telegram:
AAXX 07034 ...
Observation Header (Section 0)
Group 0 Code: 07034
Code 18: Wind Indicator (iw) Table
CodeWind Velocity MeasureUnit
0EstimatedMeters per second (m/s)
1From AnemometerMeters per second (m/s)
3EstimatedKnots
4From AnemometerKnots
1. Pressure (SLP & MSLP)
P0: 1004.3
For 24h P24 (58/59 group)
59022
40160
2. Temperature & Hygrometry (Standard IMD Formula)
10294
WB: 25.8°C
20244
RH: 74%
e: 30.4 mb
20234
Set: 23.4°C
3. Visibility & Wind
VV: 96
h: 5
00 knots
Nddff: 20000
Code 25: Visibility (VV) Table
CodeDistanceCodeDistance
90< 50 m952,000 to 4,000 m
9150 to 200 m964,000 to 10,000 m
92200 to 500 m9710 km to 20 km
93500 to 1,000 m9820 km to 50 km
941,000 to 2,000 m99≥ 50 km
Code 14: Cloud Base Height (h)
CodeHeightCodeHeight
00 to 49 m5600 to 999 m
150 to 99 m61,000 to 1,499 m
2100 to 199 m71,500 to 1,999 m
3200 to 299 m82,000 to 2,500 m
4300 to 599 m9> 2500 m or clear
4. Cloud Group (CL, CM, CH, N & Oktas)
CL: 1
Nh: 2
CM: 0
CH: 0
8-Group Clouds: 82100
Code 4: Low Clouds (CL)
CodeSpecification
1Cu humilis (ragged, flattened)
2Cu congestus (moderate/strong vertical extent)
3Cb calvus (summits lack sharp outlines)
4Sc cumulogenitus
5Sc (not formed from Cu)
9Cb capillatus (with fibrous/anvil top)
Code 5: Medium Clouds (CM)
CodeSpecification
1Altostratus translucidus
2Altostratus opacus or Nimbostratus
3Altocumulus translucidus at single level
4Altocumulus lenticularis (lens shaped)
Code 3: High Clouds (CH)
CodeSpecification
1Cirrus fibratus / uncinus
2Dense Cirrus in patches (spissatus)
3Dense Cirrus anvil remains of Cb
5. Present & Past Weather Phenomena (7wwW1W2)
Omitted (No Sig Weather)
Sky state unchanged during preceding hour
Code 27: Present Weather (ww) Decades Table
DecadeDescription
00-03Cloud characteristic changes
04-09Smoke, haze, or airborne dust
10-12Mist or shallow fog
13-19Thunderstorm (no rain), squall, or distant precip
20-29Precipitation or fog during past hour, none now
40-49Fog or ice fog at observation time
50-59Drizzle
60-69Rain (continuous or intermittent)
80-99Showers or thunderstorm at station
Code 26: Past Weather (W1, W2) Table
CodePhenomenon
0-2Cloud cover variations
4Fog, ice fog, or thick haze
5Drizzle
6Rain
8Showers
9Thunderstorm
6. Rainfall Measurement (6RRR/, 0R24, 1RT)
Omitted (Nil)
Omitted
Omitted
Code 23: Rainfall Amount (RRR) & India Specifications
Rainfall MeasuredCode (RRR)Group Encoded
Nil / 0.0 mmOmittedNone (iR=3 in Sec 1)
Trace (< 0.1 mm)9906990/
0.1 to 0.9 mm991 to 9996991/ to 6999/
≥ 1.0 mm001 to 9896001/ to 6989/

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