Cumulus Support

A band of heavy rain has now moved into NW England but what is really noticeable is the big drop in pressure. Currently falling very rapidly at 2.88hPa / hr.

same here worthing
Barometer 1003.39 hPa Falling quickly -1.94 hPa/hr

But interestingly winds have dropped off slowly all day. I suspect they'll increase significantly as the low moves to the east overnight.

Pressure now falling 3.22hPa /hr. Pity Cumulus doesn't keep these records. This is a big one.

UPDATE: Now dropping at 3.56hPa/hr.

yh same here where are about are u? i think Cumulus does keep these records.


Lowest Pressure (sl) 968.98 hPa at 05:33 on 20 November 2016

This is not storm Fionn, Ray. This is where the naming system creates so much confusion. Storm Fionn was a small kink in the isobars that delivered gusts in excess of 70mph across Northern Ireland yesterday, so Met Eireann named it. The Met Office didn't name tonight's system, neither did Met Eireann. Interesting though, as it has undergone RaCy, and will continue to deepen as it exits the UK.

dazza1223 wrote:yh same here where are about are u? i think Cumulus does keep these records.

Lowest Pressure (sl) 968.98 hPa at 05:33 on 20 November 2016

Cheshire. It's in my location. I'm not talking about lowest pressure. I'm talking about greatest drop (or rise) in pressure in one hour.

o i never uses cumulus the 1st one mate soz

Mapantz wrote:This is not storm Fionn, Ray. This is where the naming system creates so much confusion. Storm Fionn was a small kink in the isobars that delivered gusts in excess of 70mph across Northern Ireland yesterday, so Met Eireann named it. The Met Office didn't name tonight's system, neither did Met Eireann. Interesting though, as it has undergone RaCy, and will continue to deepen as it exits the UK.

Ah right. That explains why there was no reference to Fionn on the UKMO site. Bizarre though because this one looks like it will deliver strong winds as it moves east.

Check that squeeze on the isobars - gonna be nasty down the Eastern side. Also, notice that cold air being wrapped around on the Northern flank.. no wonder there's an amber warning out for another 15 - 20cm snow. Lucky sods!

Looks nasty for 0100-0500 for this neck of the woods. I'd be surprised if we get snow here but the Pennines will suffer as usual.

Pressure now dropping at 3.74hPa/hr. Must be a record.

Numbers don't mean much but a graph does...

Not quite as impressive as yours, Ray.

Just had a 46mph gust.

Northerners always have more impressive curves!

Wind is picking up here now but nothing over 30mph yet. But pressure drop continues to impress. 3.79hPa/hr now. It's tempting to stay up and watch it but I probably won't.

23:45 update: 3.96hPa/hr drop!

here it come

Wind Speed Latest Gust 29.0 mph Beaufort F4 (Moderate breeze)

Warm front passed through in the last 90 mins. Midnight update: 3.63hPa/hr drop. That's it peaked. Now for the wind. I'm off to bed. Pick this up later today.