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Report on the snow of early February 2009 in Hertfordshire

Report on the snow of early February 2009 in Hertfordshire. Julian Mayes Snr. Meteorologist / Head of Training MeteoGroup UK. The weather situation The actual conditions - snow depths etc. The causes of the snow The timing of the snow. The forecast service. Morning summary

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Report on the snow of early February 2009 in Hertfordshire

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  1. Report on the snow of early February 2009 in Hertfordshire Julian Mayes Snr. Meteorologist / Head of Training MeteoGroup UK

  2. The weather situation • The actual conditions - snow depths etc. • The causes of the snow • The timing of the snow

  3. The forecast service • Morning summary • Midday 24 forecast • Evening update (when required) • Overnight telephone consultancy

  4. The weather situation 00h 01 February

  5. The weather situation 00h 02 February

  6. 00h 02 February

  7. 03h 02 February

  8. 06h 02 February

  9. 12h 02 February

  10. 2nd February 7 10 0900h 8 8 5 10 13 17 10

  11. 2nd February 7 10 1800h 8 8 5 10 13 17 20 at 1800h 10

  12. Herts. snow depths

  13. Snow depths elsewhere • 2nd: Epsom / north Surrey area, 31cm …29-32cm Guildford ……deepest snow since December 1962. • Most widespread snow since Feb. 1991 • 6th: Chipping Norton, Oxfordshire, 35cm

  14. Herts. snow depths

  15. 3rd February 00h 03 February Cold front cleared Brief cloud clearance -10°C at dawn

  16. 4th February 00h 04 February

  17. 5th February Warm front decelerated, sleet turned to snow Morning rush hour 00h 05 February

  18. 01h. 05 February

  19. 04h 05 February 15cm Northants 12cm Oxon Luton Apt. disrupted

  20. 5th-6th February Wet snow, 5cm on Chilterns in 1-2 hrs at dawn – morning rush 200 stuck in Devon 00h 06 February

  21. 07h 06 February 25-55cm at Okehampton 18cm at Luton – deepest snow since 9 Feb 1991 Only 11cm elsewhere in Luton

  22. Snow depths, morning of 6th Bedford 18cm Northampton 15cm Luton 11-18cm Royston 11cm Borehamwood 10cm Luton Council…..”avoid the town if possible”

  23. 18h 06 February

  24. Flood event - 9th Wettest February day since 1933 locally in South East Rain turned to sleet as it moved north 00h 09 February

  25. February 2009 Daily min./ max. temps at Royston “ A month of two halves”

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