BLUEMOMENT

Hi all,

A very quick game of match the skew-t to the clouds.

Perfect early spring day today. A conditionally unstable airmass, highlighted by the forecast skew-t for Birmingham for midday, and then superbly demonstrated by the sky as cumulus clouds developed overhead. Did you notice how blue the sky was between the clouds, indicating a more unstable airmass?

The forecast skew-t to the left shows the red (temperature) line and the blue (dewpoint) line coming together at a base of around 3000ft amsl. The grey (forecast trajectory) line was just to the right of the temperature line indicating cumulus clouds to around 600mb (or near 15000ft), high enough to produce showers, and even reports of hail. That’s exactly what we got.

There were some gusts around too, between the clouds as air which has risen then sank.

A great day to witness the weather in all it’s glory.

Best wishes,
Simon

Lucky you!

It was a horrible wed, cold, windy day in Peterhead yesterday. It cleared up a bit in the evening, though.

Here's the metars from Aberdeen airport -

EGPD 122120Z 16004KT 9999 FEW008 BKN010 02/01 Q1003 TEMPO SCT010=
EGPD 122050Z 15006KT 9999 FEW008 SCT018 01/01 Q1004 NOSIG=
EGPD 122020Z 00000KT 9999 FEW018 02/01 Q1004 NOSIG=
EGPD 121950Z VRB03KT 9999 FEW040 02/01 Q1004 NOSIG=
EGPD 121920Z 18006KT 9999 SCT042 02/01 Q1005 NOSIG=
EGPD 121850Z 17006KT CAVOK 01/01 Q1004 NOSIG=
EGPD 121820Z 18005KT CAVOK 01/01 Q1004 NOSIG=
EGPD 121750Z 18004KT 160V230 CAVOK 03/02 Q1005 NOSIG=
EGPD 121720Z 18004KT 9999 6000N SCT019 03/03 Q1005 NOSIG=
EGPD 121650Z 17004KT 9999 4000N FEW009 BKN020 05/04 Q1005 NOSIG=
EGPD 121620Z 16004KT 9999 4000N FEW007 SCT011 BKN022 05/04 Q1005 NOSIG=
EGPD 121550Z 16006KT 4000 -DZ FEW003 BKN004 05/04 Q1005 TEMPO 5000 BKN012=
EGPD 121520Z 15010KT 4000 DZ BKN004 05/04 Q1006 NOSIG=
EGPD 121450Z 16011KT 3600 DZ BKN004 04/04 Q1006 NOSIG=
EGPD 121420Z 15012KT 3500 DZ BKN004 04/03 Q1006 NOSIG=
EGPD 121350Z 15012KT 140V200 3500 DZ BKN004 04/03 Q1007 TEMPO 5000 -DZ BKN012=
EGPD 121320Z 16015KT 4200 DZ BKN004 04/03 Q1007 TEMPO 5000 BKN012=
EGPD 121250Z 15016KT 4200 -RA BKN004 04/03 Q1007 TEMPO 5000 BKN012=
EGPD 121220Z 15015KT 3500 -RADZ BKN005 04/03 Q1007 TEMPO 5000 BKN012=
EGPD 121150Z 15017KT 3800 DZ SCT005 BKN008 04/03 Q1007 TEMPO 5000 -RA BKN012=
EGPD 121120Z 15016KT 3800 DZ SCT005 BKN008 04/03 Q1008 TEMPO 5000 -RA BKN012=
EGPD 121050Z 15015KT 3800 -RA BKN008 04/03 Q1008 BECMG 8000 BKN012=
EGPD 121020Z 15016KT 9000 RA BKN008 04/03 Q1008 TEMPO -RA BKN012=
EGPD 120950Z 15016KT 8000 -RA SCT007 BKN010 04/02 Q1008 NOSIG=

Yuk! Just look at that front go through and vis come back up at 1620.

At Weather School I try to encourage pilots to start reading Metar reports,l really useful when coastal sailing.

Simon