"George Booth" schreef in bericht
...
:
: "Dick Lovett" wrote in message
: ...
: 0850Z W F3 9999 3CI250 7.1/5.6 Q1035=
: 09-09Z Tx 9.7 Tn 5.6 Tg 3.8 RR nil. RMK: COTRA. Unusual pressure
: oscillations between 1033 and 1036 millibars in last 3 hours and
: probably mountain wave induced.

: Well, I didn't know that was the cause. But here is the evidence from
Epping
:: http://homepage.ntlworld.com/gesc_b/...s/baroblip.htm

This was also observed and commented on in Belgium.

A rise from 1034 to 1036 hPa at 11.00 UTC (12.00 local time) and then a fall
back to 1034 by 13.00 can be seen on the Brussels METARs
http://weather.noaa.gov/weather/current/EBBR.html

The observer at St Pieters Rode near Leuven (east of Brussels) reported a
rise from 1034 hPa to 1037 and then back to 1034 within 2 hours around
midday local time.

Same pressure peak at 12.00 local time can be seen on the Barometer graph of
the site at Ransberg near Tienen
http://home.scarlet.be/weerstation.r...ro_Plusdag.htm

Colin Youngs
Brussels