Wind storm | hurricane | Height m/s 1 5 10 15 | 20 25 30 | 35 40 45 | Base C1 C2 C3 C4 Summ1 Summit2 Km/h 4 18 36 54 | 72 90 108| 126 144 162 | 6139 6748 7091 7499 8249 8854 9192 m Kt 2 10 19 29 | 39 49 58 | 68 78 87 | 19009 21007 22132 23471 25932 27917 29025 ft
Daily weather forecasts provided by
Sent out daily to us by email, these forecasts are reproduced here.
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June 1 T May 31 M May 31 M May 28 F May 28 F May 24 M May 24 M May 21 F May 21 F May 20 T May 20 T May 18 T May 17 M May 17 M May 17 M May 17 M May 14 F May 13 T May 13 T May 12 W May 11 T May 11 T May 10 M May 9 S May 9 S May 9 S May 7 F May 7 F May 6 T May 6 T May 5 W May 5 W May 4 T May 4 T May 3 M May 2 S April 30 F April 29 T April 28 W April 27 T April 26 M April 25 S April 23 F April 22 T April 21 W April 20 T April 19 M April 18 S April 16 F April 15 T April 14 W April 13 T April 12 M April 11 S April 9 F April 8 T April 7 W April 6 T April 5 M April 4 S April 2 F April 1 T March 31 W March 30 T March 29 M March 28 S March 26 F March 25 T March 24 W March 23 T March 22 M March 21 S Notes March 19 F March 18 T March 17 W |
Table info LEVEL: The levels are presented in meters but actually based on air pressure. The heights for different camps in the forecast will thus vary. The pressure level is presented in the forecast as follows:
WIND: The first figure indicates wind speed in meters/second. The second wind direction. 1 m/s = 3.6 km/hour 1 m/s = 2.2 miles/hour 1 m/s = 1.9 knots By definition a Storm is above 17 m/s, Hurricane is above 32 m/s. HUMIDITY: High humidity % indicates high risk of snow/rain. Snow fall is also determined by other factors like air pressure and temperature. High humidity doesn't necessarily bring snow fall, but the chances certainly increase. To simplify: At a humidity level above 50 - 60 % there is a chance of snow. At 80 % or higher it is a very high chance of snow. VARIATIONS IN TABLE: The table is made by a super computer. The Synopsis by a meteorologist. The super computer will do it's prediction at an exact time. Wind speeds for camp one can thus vary in the table at 5 m/s and then suddenly 15m/s and then back to 5 again. This is a variation in the computer model. ALWAYS judge the overall pattern in the tables and combine with info from the synopsis made by the mets. TIME: All times are GMT. SYNOPSIS: The synopsis is made daily by a team of meteorologists. The final forecast is based on information from the table, satellite images and other sources. The Synopsis is then sent to AdventureWeather for a check. Often there are follow up discussions before it is actually distributed to climbers around Himalaya. Sometimes the synopsis might differ from the table. For example the table may show 100% humidity for three days starting Monday. However, the meteorologists believe there is a chance that the main system actually moves South from Everest. He thus wrote "risk of wide spread precipitation". |
RMH 
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