August

Summer 2024 – Objective LWT

MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. was below average for much of the summer [JJAJJA Meteorological Summer comprising the months June, July & August] with a strong mobile W or SW flow with an above average GIGI Gale Index. Brief anticyclonic interludes that got briefer as the summer went on. The NW flow in June backed into a SW’ly from the middle of July.

September 5, 2024

August, Circulation, LWT

Summer 2024 – Objective LWT Read More »

August 2024 – Global Temperatures

After a break from being the warmest month on record in July, the ERA5ERA ERA stands for 'ECMWF Re-Analysis' and refers to a series of research projects at ECMWF which produced various datasets (ERA-Interim, ERA-40, etcetera). series is back on track. This months anomaly of +0.712°C was again the warmest on record, but just a smidgeon (0.002°C) warmer than that of August 2023 (0.71°C).

It may be another record month, but the 12 month moving average has flattened out now, after sharply rising since mid 2022. As you would expect 2023 and 2024 are also neck and neck as the highest daily anomaly on record too. It looks to me that the global temperatures we’ve experienced over the last 18 months could become the new norm despite an imminent La NinaLa Niña La Niña is an oceanic and atmospheric phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation climate pattern. The name La Niña originates from Spanish for "the girl", by analogy to El Niño, meaning "the boy". In the past, it was also called an anti-El Niño[1] and El Viejo, meaning "the old man.".

September 4, 2024

August, ECMWF, Global Temperatures

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August 2024 – Temperature

A lot of strange goings on in mean temperature anomalies for August across this part of the northern hemisphere. One of them was a belt of colder than average temperatures that extended from the central Asia southwest across Pakistan, and then on westward across sub Saharan Africa. Another was the more intense pockets of cold air across British Columbia and Iceland. The North Atlantic was a little colder than average north of 55N, but much warmer than that to the south (+2C), the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. again ending up sandwiched again in a NW-SE temperature gradient.

September 4, 2024

Anomalies, August, Global Temperatures

August 2024 – Temperature Read More »

August 2024 – MSLP

Anomalies of -15 hPahPa A Hectopascal is the SI unit of pressure and identical to the Millibar to the SE of Iceland displaced the usually shallower Icelandic low east to produce a broad SW’ly flow across the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. and Ireland during August. The semi-permanent Azores high remained with pressure a little higher (+2 hpa) than average enhancing the flow.

September 4, 2024

August, Circulation, MSLP

August 2024 – MSLP Read More »

23 Aug 2024 – Storm Lilian

Here are some random images, tables and animations that I posted regarding Storm Lilian to my Twitter account @xmetman. Nothing particularly devastating about the winds or the rain from the storm itself, which the Met OfficeUKMO The Meteorological Office is the United Kingdom's national weather service. It is an executive agency and trading fund of the Department for Business, Energy and Industrial Strategy should really have never named. It was gone in a flash, and although there were gusts in excess of 70 mph on the Lancashire coast, only eight SYNOPSYNOP SYNOP (surface synoptic observations) is a numerical code (called FM-12 by WMO) used for reporting weather observations made by manned and automated weather stations. SYNOP reports are typically mad hourly and consist of groups of numbers (and slashes where data is not available) describing general weather information, such as the temperature, barometric pressure and visibility at a weather station. stations recorded a gale. Gale Index wise the storm didn’t register above the 200 mark because of its size, with the extratropical cyclone that had been Hurricane Ernesto scoring much higher earlier in the week. I should have written a piece about Ernesto, but when you have so few followers as I have, I thought what’s the point 😪

August 23, 2024

August, Gale, Named Storms

23 Aug 2024 – Storm Lilian Read More »

August 2023 – Circulation

It’s easy to see why August 2023 was such an unsettled month across Ireland and the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. with temperatures just below the average when you study the MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. anomalies.

August 2023 – Global temperatures

_{^{August
DIYDIY Do It Yourself Global temperature series
1948-2023}}

Not content with having the warmest July on record, 2023 has now produced the warmest August on record too. Although it’s not quite as warm a month as July was, it easily beat the August of 2016 into second place. The years 2016 and 2023 are neck and neck at the moment for the warmest year on record, but I think there can be little doubt that 2023 could end up being the warmest year even though there are still four months to go.😮
Of course global temperatures could slump in the next four month. At the moment in my DIY series, the global mean daily temperature for the 1st of September 2016 has just overtaken that of the 1st of September 2023 (see graph below) so it’s still going to be a close run thing.

I’ve based this story on reanalysis data that I use in my DIY Global temperature series. It tracks the other series quite faithfully and I have no doubt that in the coming week Copernicus will confirm what I’m guessing at. Well it’s all a bit of a guess anyway.

August 2023 – Temperature anomalies

To say that the estimated global temperature for July made it the warmest on record of any month since 1850, it seems that no one bothered to let August know, and August had no intention of following suit, at least in our corner of the world.

Iceland was noticeably colder than average again.
The record high SSTSST Sea Surface Temperatures kept the North Atlantic ~ 1°C above the LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO..
The intense heatwave in southern France seems to have been cancelled out by an equally cold start to August that no one seemed to notice.