Big difference between forecast and actuals yesterdam in the South East.
Cambridge was offered:

TAF EGSC 010706Z 010716 34007KT 2000 BR BKN003
TEMPO 0709 1200 BKN001
BECMG 0912 7000 NSW SCT008 BKN020
PROB40 TEMPO 0716 3000 +SHRA TSRA BKN008 BKN030CB
TEMPO 1316 9999=

TAF EGSC 010913Z 011017 34005KT 4000 BR BKN006
BECMG 1013 6000 NSW BKN020
PROB30 TEMPO 1017 3000 +SHRA TSRA BKN008 BKN020CB
TEMPO 1317 9999=

TAF EGSC 011214Z 011317 02005KT 6000 SCT008
PROB30 TEMPO 1317 3000 +SHRA BKN008 BKN020CB
TEMPO 1517 9999=

Reality was:

METAR EGSC 010720Z 34006KT 4500 BR -RA SCT003 BKN005 09/09 Q1005 =
METAR EGSC 010750Z 34004KT 4500 BR -RA SCT003 BKN005 10/10 Q1005 =
METAR EGSC 010820Z 35006KT 4500 BR SCT003 BKN005 10/10 Q1005 =
METAR EGSC 010850Z 36005KT 4500 BR TS FEW003 BKN005 BKN030CB 10/10 Q1006 =
METAR EGSC 010920Z 36004KT 4500 BR FEW003 BKN005 BKN030CB 11/11 Q1006 =
METAR EGSC 010950Z 02007KT 4500 BR FEW003 OVC005 11/11 Q1006 =
METAR EGSC 011020Z 02004KT 4500 BR FEW003 OVC005 11/11 Q1006 =
METAR EGSC 011120Z 02006KT 4500 BR FEW003 OVC005 11/11 Q1006 =
METAR EGSC 011150Z 03005KT 4500 BR FEW003 OVC005 12/12 Q1006 =
METAR EGSC 011220Z 02003KT 4800 BR FEW004 OVC006 12/12 Q1007=
METAR EGSC 011250Z 03003KT 4800 BR FEW004 OVC006 12/12 Q1007=
METAR EGSC 011320Z 03003KT 6000 FEW005 OVC006 12/12 Q1007 =
METAR EGSC 011350Z 03001KT 6000 FEW006 OVC007 12/12 Q1007 =
METAR EGSC 011450Z 33002KT 7000 FEW007 OVC009 12/12 Q1007 =
METAR EGSC 011520Z 33004KT 7000 FEW007 OVC009 12/12 Q1007 =
METAR EGSC 011550Z 33004KT 4800 BR FEW007 OVC009 12/12 Q1007 =
METAR EGSC 011620Z 34004KT 4800 BR FEW005 OVC006 12/12 Q1008 =
METAR EGSC 011650Z 33004KT 4500 BR FEW005 OVC006 11/11 Q1008 =
METAR EGSC 011720Z 35003KT 4200 BR FEW005 OVC006 11/11 Q1008=
METAR EGSC 011750Z 34003KT 4200 BR FEW005 OVC006 11/11 Q1008=
METAR EGSC 011820Z 32003KT 4200 BR FEW005 OVC006 11/11 Q1008=

It made a significant operation difference to me, flying into Cambridge at
1820, anticipating (at the start of the day) an easy visual arrival in 7000
BKN020 and ending up needing the instrument landing system.

Any ideas what happened to change things? More frontal cloud than expected
to prevent diurnal heating? More moisture around from earlier rain?

Julian Scarfe