Report - London Borough of Hillingdon
Report - London Borough of Hillingdon
Report - London Borough of Hillingdon
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WINTER SERVICE OPERATIONAL PLAN<br />
Weather Forecasts and Decision Making Procedure<br />
APPENDIX 3<br />
INTRODUCTION<br />
Weather forecasting is provided by the Met Office as part <strong>of</strong> their <strong>London</strong> Winter Weather<br />
service. The period <strong>of</strong> service is 29th October 2010 to 1st April 2011.<br />
From the 29 October, the highways Call Out Officer will contact the <strong>London</strong> Weather Centre<br />
08704 555801, DAILY inc weekends to ascertain the weather forecast and fill in the<br />
appropriate pre-printed daily weather report form, Appendix 5. The RMS will be contacted<br />
and organise appropriate action.<br />
SERVICE<br />
Service consists <strong>of</strong> three elements:<br />
• Email Forecast<br />
Main 24-hour forecast issued at 11:00 hrs is emailed to the SSMM and a copy for file.<br />
Copy given to Highway Duty Officer on call ‘out <strong>of</strong> hours’ with a copy <strong>of</strong> any order<br />
letters if service has been ordered during working hours by SMSS. Faxed updates<br />
may be issued by the Met. Office at other times and available ‘out <strong>of</strong> hours’ if the<br />
forecast has significantly changed.<br />
• Answer Phone Forecast<br />
This provides the same information as from the emailed forecasts and can be<br />
accessed ‘out <strong>of</strong> hours’ to update 11:00 hour forecast. Forecasts are provided at<br />
11:00, 17:00, 23:00 and 03:00. Intermediate forecasts will be issued if there is a<br />
‘weather warning’.<br />
• Consultancy Service direct with forecasters<br />
Direct discussions with the duty forecaster for clarification <strong>of</strong> latest answer phone/fax<br />
forecast only. Main points <strong>of</strong> discussion and decisions resulting from these are to be<br />
recorded on the paper forecast and filed ASAP. (Note: Do not divulge PIN number<br />
to others!)<br />
CONDITION INDICATORS<br />
The following indicators are used in all forecasts and this system is the main element <strong>of</strong> the<br />
Met Offices <strong>London</strong> Winter Weather Service.<br />
INDICATOR<br />
NIL<br />
ALPHA<br />
BRAVO<br />
CHARLIE<br />
DELTA<br />
SNOW<br />
TEXT DECODE<br />
Road surface temperatures expected to remain above zero degrees Celsius and snow not expected.<br />
Road surface temperatures expected to fall below zero degrees Celsius but roads are expected to<br />
remain dry.<br />
Road surface temperatures expected to fall below zero degrees Celsius and icy frost is expected to<br />
form.<br />
Road surface temperatures expected to fall below zero degrees Celsius and icy patches are expected<br />
to form.<br />
Road surface temperatures expected to fall below zero degrees Celsius and widespread ice is<br />
expected to form.<br />
Snow is expected.<br />
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