#ECMWF

Christian Grams

cgrams_lsdp

good point @SimonLeeWX . Using different regime definitions allows somewhat to deal with flow-dependent predictability as we advocate in our @ECMWF article https://www.ecmwf.int/en/newsletter/165/meteorology/how-make-use-weather-regimes-ext

Allan Huffman

RaleighWx

For the weekend This is how I see it now A cold/dry air mass will be in place Sat Here is the 6z ECMWF DPs mid-day Saturday. Notice 6F at

Jeff Frame

VORTEXJeff

ECMWF really trying to put the brakes on next week's much-adverised cold shot for the Midwest, while the GFS is having none of it. Ensembles show the same pattern This

Simon Lee

SimonLeeWx

Because of the time-lagged ensemble approach used by the Met Office vs. the "burst" approach used by ECMWF, the January C3S update of GloSea5 only had a max. ~40% probability

Ruth Mottram

ruth_mottram

I see that Barcelona's bid to host @CopernicusECMWF service is out. A stroll down La Rambla after meetings and stuff does sound appealing and of course it's close to the

Scott Duncan

ScottDuncanWX

Arctic heatwaves have happened before. Nothing to worry about then, right?There has been so much skepticism but there is reason to be alarmed and this is why...[The inconvenient follow-up thread]

NWS Salt Lake City

NWSSaltLakeCity

Since it's a quiet Sunday morning here at the office, we wanted go into a little detail about something interesting we're seeing in the long term forecast. Follow along with

Georgios Papavasileiou

PapavasileiouWX

1/5 During January of 2021 a western based negative #NAO (Fig. 1) was established leading to robust anomalies in #precipitation and #temperature over the N. Atlantic and #Europe according to

Andrew Berrington

ahberrington

Alright, with #ERA5 reanalysis being extended back to 1950 today, figured I'd take an opportunity to plot 300 hPa, 500 hPa, 850 hPa, and MSLP/10 m wind for a number

Fabien Maussion

FabClimate

After yesterday's poll, a thread. This plot shows the 2m temperature provided by @ECMWF's #era5 reanalysis, (1) averaged over the globe and (2) averaged for all glacier locations (weighted by

Ian Fergusson

fergieweather

W COUNTRY OUTLOOK 1/3: After a periodically showery & comparatively mild phase Thurs-Fri, we shift into a markedly colder period developing through weekend & on into next week. By Sunday,

Philippe Papin

pppapin

The intensity forecast for #Isaias remains very challenging.While westerly VWS will continue to affect Isaias the next 2-3 days, its magnitude & proximity of dry air nearby has been varying

JKP Weather

JkpWeather

Huge spread for Monday’s snow event, between 1” and 15”. Unfortunately, this event has the potential to bust badly (not saying it will), since the rain-snow line will likely start

Shahzad Gani

shahzadgani

Looking for long-term particle number concentrations and size distribution data to better understand air pollution dynamics in Delhi?Of course you are!New paper w/ @joshapte @SahilBh_India @pkanan03 & others at @UTAustin

NWWashingtonWX

wx_washington

1. More -SN today as mstr overruns cold air. Model performance : horrible/inconsistent! Best bet: watch observations, satellite imagery, pressure gradients, and radar. All show weak convergence ongoing. Likely amts

Andrew Moore

OSUWXGUY

My thoughts on #Invest92L - Definitely one of the largest, most impressive waves I've seen - good inflow of moisture from from the south and southwest, dry air pouring down

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