April 24/25/26 1995

[damianslaw]

Reading about these dates in a royal meteorological magazine, there was a major 24 hour swing in temperatures in Surrey - Warlingham to be precise from 8.7 on the 24th to 19.9 on the 25th and back to 9.4 degrees on the 26th,

What caused such a dramatic temp swing, and was this confined to SE England only... would be interesting to see whether anyone has any recollections of events during this particular time.. such a swing could only happen in April..

[Rob]

thats quite a big change for 24 hours.

[Thundery wintry showers]

It was associated with a pool of very warm upper air that came in from the east.

24 April 1995- easterly, some low cloud about:

http://www.wetterzentrale.de/archive/ra/19...00119950424.gif

http://www.wetterzentrale.de/archive/ra/19...00219950424.gif

25 April 1995- in comes the warm pool (though I remember it staying cool and cloudy on the Tyne & Wear coast- sunshine inland though)

http://www.wetterzentrale.de/archive/ra/19...00119950425.gif

http://www.wetterzentrale.de/archive/ra/19...00219950425.gif

and on 26 April 1995 we were seeing colder air spreading down from the north, cooling things off somewhat in the south, but heralding the end of Tyneside's dull spell:

http://www.wetterzentrale.de/archive/ra/19...00119950426.gif

http://www.wetterzentrale.de/archive/ra/19...00219950426.gif

I associate April 1995 with that phenomenally warm first half followed by the Easter switch-around and snow showers from the subsequent northerly, plus this subsequent switch-around didn't affect Tyneside so I tend to overlook it- but it was remarkable all the same.

[damianslaw]

It was associated with a pool of very warm upper air that came in from the east.

24 April 1995- easterly, some low cloud about:

http://www.wetterzentrale.de/archive/ra/19...00119950424.gif

http://www.wetterzentrale.de/archive/ra/19...00219950424.gif

25 April 1995- in comes the warm pool (though I remember it staying cool and cloudy on the Tyne & Wear coast- sunshine inland though)

http://www.wetterzentrale.de/archive/ra/19...00119950425.gif

http://www.wetterzentrale.de/archive/ra/19...00219950425.gif

and on 26 April 1995 we were seeing colder air spreading down from the north, cooling things off somewhat in the south, but heralding the end of Tyneside's dull spell:

http://www.wetterzentrale.de/archive/ra/19...00119950426.gif

http://www.wetterzentrale.de/archive/ra/19...00219950426.gif

I associate April 1995 with that phenomenally warm first half followed by the Easter switch-around and snow showers from the subsequent northerly, plus this subsequent switch-around didn't affect Tyneside so I tend to overlook it- but it was remarkable all the same.

Thanks for uploading the charts from said period and providing an interpretation of events. Yes a very interesting synoptical evolution, love the northern blocking - very strong and robust just the sort of synoptics snow and cold lovers including myself would dream of in mid winter, but which always seem to occur in mid-late spring.

[Nick H]

I can't say I remember this particularly but here in the Chilterns we had:

24th 10°C

25th 21°C

26th 8°C

[Weather-history]

Here's the 25th April 1995 forecast after the northerly spell had blown itself out

Here's the 26th April 1995 forecast