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European Storm & Convective Discussion
The Tall Weatherman replied to A.J's topic in Storms & Severe Weather
An absolutely stunning waterspout on el prat yesterday on the Italian coast ! -
I have strong feeling in my gut we are in on a chance of some subtropical activity hitting the the UK this year. Firstly conditions seem primed for explosive development over the subtropical Atlantic as sea temperatures are way above average and little shear is present to wreck the storms. Many models show a cut off low diving down and sending any subtropical development spiralling round like a washing machine across northern France and the UK. No need to be super alarmed but it may well be an interesting year . Also we already have a depression on the move which is projected to turn into a hurricane in the next few days. So let’s watch the Radar !
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What everyone’s talking about I just realised is very concerning. The NHC has a medium risk of development along central subtropical Atlantic, based on the ECMWF the depression quickly intensifies into a low end hurricane and barrels towards the Bay of biscay before darting north into south England. This probably won’t happen but It’s a first time I have seen a run like that !
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Looking interesting for the weekend and possibly further now. The ECM, NMM, UKV and many other models are supportive of storms. Friday is looking like the possible first day of action with <1000 situating for a time over east anglia, however there is not much model agreement with this day but more on The weekend and the push early into the week, although then it does look like much of the cape will be out at sea. As we all know things can definitely change from this timeframe so we should wait a bit.
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The latest models are definitely signalling a slight westward trend in the last few hours, don’t forget we have had 2 remarkable MCS’s this year that took a more westward path than originally expected. Ingredients are definitely there early tomorrow morning for a large MCS to sweep across Southern and eastern England, the UKV does push it more central . Very high rainfall totals may hit the areas affected by the storms which may cause flash flooding. It has to be said I am a tad bit concerned that yellow warning will jinx the storms though .
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Looking interesting Wednesday night into Thursday, the forecast is not fully banged on as convective forecasting >12 hours away can be tricky especially for elevated storms. The main models suggesting are the NMM, arome and the Arpege showing a long line of storms breaking out across the east of britian smashing head first along kent, Lapse rates and Cape should encourage convective growth. The UKV 6z has recently downgraded its potential to a long band of reasonably light rain. Anyways the south east is as dry as the gobi and it needs serious rain 🏜.
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The first interesting system of the year is developing. From what I have seen the environment seems conducive for development with the storm not being a sheared mess. Hurricane hunters are out for it as well !
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Tuesday morning on the UKV is looking more active than before ! A thunderstorm system moves through West/central England in the morning hours and as the day goes on the risk looks like it will stretch more west than before shown by the NMM and the UKV. We are approaching the 24 hour mark so the models are starting to stiffen up. Anyways good luck storm lovers !🌩
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Starting to get real intriguing for Monday and Tuesday based on the new 12z runs. Definitely room for change but the situation is definitely getting closer. Monday looking like a big day with (<2000) cape building across central and northern Wales moving east as the day goes on, the storms might become organised for a time as the afternoon ends around parts of central/western England . The storms should rumble away by Tuesday morning and quickly during the morning hours (<2000) cape should interact with the very warm and humid, perhaps sheared environment. Central south England and eastern England should see the strongest storms of day but widely across England scattered storm can be expected.
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Going to be very interesting on Monday and Tuesday. ECMWF and NMM are showing some afternoon thunderstorms breaking out on Monday widely across the UK with Cape value’s perhaps surpassing <1000, along with that it looks like cap won’t struggle. Tuesday on the NMM is looking very interesting across the East and south England with the GFS showing <1200 cape across some southern areas and NMM showing 1500 cape in some eastern areas. Something to watch.