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rainfall in the region through much of Thursday and Friday. A Yellow National Severe Weather Warning for rain has been issued for central and eastern Scotland where some exceptional rainfall totals could accumulate over two or three days, mainly, but not exclusively over high ground. Further

Station Based Monthly Planning Averages for LERWICK (Lat=60.14N Long=1.18W) 1-in-10 year values - based on station data between 1961 and 2020 Month Daily rainfall total (mm) Days with rainfall >5mm Days with air frost Days with snow lying at 0900 UTC January 206.1 18 15 12 February 170.7 14 16 12

Catchments y y Temperature y y ALERT OVERVIEW Wind y - Alert panel y y Wind and gust y y Colour coded site pins y y Wind and precipitation y - Site summary popover y y Wind over total cloud y - CHART VIEW Lightning risk y - 1 day view y y Lightning with cloud y - 7 day view y y Lightning y y 14 day view y

for Service Partnership (CSSP) China project, scientists pioneered a technique for understanding the contribution of tropical cyclones to the total rainfall amount in a region. In the WCSSP Southeast Asia project, scientists developed methods to evaluate the accuracy of tropical cyclone forecasts

of the month saw the sunniest and warmest weather. Sunshine totals of 14-15 hours were recorded widely each day from the 11th to 19th, especially over England and Wales. By the 16th, temperatures were approaching 30 °C over much of England and Wales and continued to climb across the UK each day, exceeding

but rainfall totals were only near average in the south. Overall, 2011 saw an exaggeration of the normal north-west / south-east rainfall gradient across the UK. Some locations in north-west Scotland recorded over 4,000 mm of rain for the year and for Scotland overall it was the wettest year

rainfall amounts, though exact details regarding the track of the low and thus where we might see the highest rainfall totals remains uncertain. Warnings are likely to be updated as more details emerge, and it is important therefore, that people to keep an eye on the forecast.” It’s thought that many

-eastwards between Scotland and Iceland. A weather front associated with airflow brought exceptionally prolonged and heavy rainfall to the Lake District as the air was forced to rise over the high ground. Heavy rainfall persisted across northern England for around 36hours. High rainfall totals falling

. Hampstead recorded 170.8 mm (6.72 inches) of rain in the twenty-four hour period to 0900 GMT on 15th with much of the rain falling between 1730 and 2000 on the 14th. This was the largest daily total ever recorded in the London area and severe flooding resulting from a storm of this magnitude

the warmest spring on record for the UK at a mean temperature of 9.5°C. UK statistical summary Mean temperature Rainfall Sunshine The provisional mean value for Spring is 9.51°C, which is 1.44° above the 1991- 2020 average. The provisional total for March and April is 128.2 mm, which is 56% of the 1991- 2020 average. The provisional total for March and April is 653.3 hours, which is 143% of the 1991-2020 average.