simonjk
Well-Known Member
Hi again (what a busy day of posting, must get some work done 
)
A deep area of low pressure (~980mb) is going to be crossing Scotland this weekend. By 6am Sunday morning it is expected to be off northern Scotland...
Now, given this area of low pressure, it's depth, development and track, wind speeds across outhern and western Scotland as the feature passes through, can be expected to be around 35-45kt (F 8 -F9) gusting in excess of 60kt (F10-F11) over exposed coasts and hills.
Many of you will have access to GRIB data and can check the speeds predicted by the models. This data will be the same as the chart below...
Notice how the mean wind speeds from the GRIB data shown here are of the order of 20-25kt (although the orange colours in the far NW of the chart indicated mean speeds of 30kt).
This is a good example of how GRIB data will smooth out wind speeds and, although very useful, GRIB is only a tool in the forecasting box, especially in potentially dangerous situations.
Thought you might be interested.
Simon
)A deep area of low pressure (~980mb) is going to be crossing Scotland this weekend. By 6am Sunday morning it is expected to be off northern Scotland...
Now, given this area of low pressure, it's depth, development and track, wind speeds across outhern and western Scotland as the feature passes through, can be expected to be around 35-45kt (F 8 -F9) gusting in excess of 60kt (F10-F11) over exposed coasts and hills.
Many of you will have access to GRIB data and can check the speeds predicted by the models. This data will be the same as the chart below...
Notice how the mean wind speeds from the GRIB data shown here are of the order of 20-25kt (although the orange colours in the far NW of the chart indicated mean speeds of 30kt).
This is a good example of how GRIB data will smooth out wind speeds and, although very useful, GRIB is only a tool in the forecasting box, especially in potentially dangerous situations.
Thought you might be interested.
Simon