PITSFORD HALL WEATHER STATION
NORTHAMPTON, UNITED KINGDOM

WEATHER REVIEW - JUNE 2008

Air Temperatures
The Highest Maximum:    25.0 C on 9th
The Lowest Maximum:    14.3 C on 12th
The Highest Minimum:    15.0 C on 28th
The Lowest Minimum:    6.5 C on 16th
The Mean Maximum:    19.1 C
The Mean Minimum:    10.3 C
The Overall Mean:    14.7 C
Difference from the Monthly Mean:  +0.4 C

Black Bulb
Maximum (at 0900):    35.0 C on 9th
Mean (at 0900):    23.4 C

Relative Humidity:
Highest Relative Humidity (at 0900):  98.9 % on 3rd
Lowest Relative Humidity (at 0900):  53.5 % on 9th
Mean Relative Humidity (at 0900):  72.3 %

Dew Point:
The Highest Dew Point (0900):   12.9 C on 3rd & 8th
The Lowest Dew Point (at 0900):  6.6 C on 15th
The Mean Dew Point (at 0900):   10.1 C

Rainfall:
Total:      39.9 mm
Difference from the Monthly Mean:  69.9 %
Duration:     42.9 hrs
Highest 24 hour fall (0900 to 0900):  10.9 mm on 2nd
Rain Days (>/=0.2mm):    8
Wet Days (>/=1.0mm):    8

Sunshine:
Total Duration of Bright Sunshine:  219.4 hrs
Sunniest day:     11.7 hrs on 19th
No. of days without sunshine:   3
Difference from the Monthly Mean:  139.2 %
Cloud cover (mean at 0900):   5.7 oktas (71.3 %)

Pressure (reduced to sea level at 09:00):
The Highest Pressure:    1025.8 mb on 9th
The Lowest Pressure:    1006.2 mb on 22nd
Mean Pressure (recorded at 0900):  1016.4 mb

Winds
Run of wind (mean over 24 hrs):  98.3 miles
Mean daily wind speed:    5.3 mph
Run of wind (cumulative):   2949.5 miles
Highest Maximum Gust:   36 mph on 22nd
No. of gusts of 50mph or more:   0
Highest wind strength (at 0900):  16.1 mph on 14th
Mean wind strength (at 0900):   8.2 mph

Winds from the Following Directions:

N 6 NE 3 E 1 SE 1 S 3 SW 4 W 4 NW 8 Calm 0

Concrete
Lowest Concrete Minimum:   5.2 C on 16th
Mean Concrete Minimum:   9.0 C

Evaporation
Piche      98.7 ml
Pan      97.04 mm

Days with:
Thunder:     0
Hail <5mm:    0
Hail >/=5mm:     0
Snow or snow & rain:    0
Snow lying:     0
Fog:      0
Air Frost:     0
Gales:      0

All data © Pitsford Hall weather station.

On 1 Jul, 22:03, "Mike Lewis"  wrote:
> PITSFORD HALL WEATHER STATION
> NORTHAMPTON, UNITED KINGDOM
>
> N 6 NE 3 E 1 SE 1 S 3 SW 4 W 4 NW 8 Calm 0
> > All data © Pitsford Hall weather station.

Hi Mike and COL people on UkSci.weather.

When you use just 8 compass points for the wind direction, what
happens to SSW, WSW etc?

Just wondered!

Steve J

Hi Steve

In Appendix III of the Observer's Handbook there is a table which 
demonstrates the method of reduction of wind directions from 16 to 8 compass 
points. On a routine daily basis, we do record to 16 compass points but as 
you know the COL summary requires 8.

In short, the number of occurrences of wind from NNW, SSE etc. is 'shared' 
between the two nearest compass points. For example, if NNW were recorded on 
4 occasions, 2 would be added to NW and 2 added to N. Where you have an odd 
number  they are shared such the extra observation is thrown clockwise, e.g. 
5 observations of SSE would result in 2 being added to SE and 3 to S.

I hope this is clear...but as I say the Observer's Handbook does explain it 
quite well.

Regards

Mike

"Steve J"  wrote in message 
news:d2048254-1c01-4283-8996-585c9a666c47@d77g2000hsb.googlegroups.com...
On 1 Jul, 22:03, "Mike Lewis"  wrote:
> PITSFORD HALL WEATHER STATION
> NORTHAMPTON, UNITED KINGDOM
>
> N 6 NE 3 E 1 SE 1 S 3 SW 4 W 4 NW 8 Calm 0
> > All data © Pitsford Hall weather station.

Hi Mike and COL people on UkSci.weather.

When you use just 8 compass points for the wind direction, what
happens to SSW, WSW etc?

Just wondered!

Steve J