Screenshot of text that says: "Important Notice (3/24/2026): NOAA NWS/NCEP has terminated the NCEP/NCAR R1 reanalysis as of March 18th, 2026. NCEP/NCAR R1 has been used as the atmospheric forcing data in the PIOMAS reanalysis . We had not been aware of this change in service which was apparently formally announced Feb 13. 2026. This means that we will have to find alternatives and generate a replacement. It will take considerable effort and time to update data streams, re-calibrate the model and generate updated time series. We don’t yet have a good sense if that’s possible with available funds and if so, when we will be able to resume production of a new PIOMAS time series. While a replacement of the NCAR/NCEP R1 as the forcing product makes ultimate sense, we would have wished for a longer time period to facilitate the transition. We are sorry what this means to our many users. PIOMAS has been in production since March 2010 and we rarely missed updates by more than a couple of weeks (except for government shutdowns). This will be longer. Check back here for updates! "

I had a feeling this was going to happen. Sad news, especially given the poor state of sea ice after this winter.

Looks like we won't be getting any more data for Arctic sea-ice thickness and volume for a while from PIOMAS. See: psc.apl.uw.edu/research/pro...

Glorious Sunrise. This morning in Chicago on the last Sunday of March 2026.

7 am EDT/6 am CDT Sunday morning (March 29) #USwx #TEMPERATURES #wx #wxsky

( #NWSPhoenix): Seeing thunderstorms in northern Mexico like this is a more common site for the Monsoon NOT the end of March.

The storms to our south will help push a surge of moisture into #Arizona tomorrow, which will aid in shower and storm development in southern Arizona in the afternoon. #AZwx

( #NWSNorman): Pattern change will bring a potential return of moisture this week with increasing shower and #storm chances by the middle of next week and into next weekend. Continue to check back for forecast updates! #TXwx #OKwx #wx #wxsky

Even with some snow showers back in the forecast next week… the current edition of the Apr 1st Sierra snowpack will likely be at its lowest since 2015, and this could have trickle down impacts on water resources and fire danger into Summer. 3/28/2026 @nbcbayarea

Chasing in PA this March has been ridiculous. I managed three worthwhile events with supercells each time, good visuals, and some of my all-time favorite lightning captures. I've never had a pre-season this active

( #NWSReno): Wait… what’s that in the sky? Precipitation?!

A few cumulus towers are bubbling up near the Sweetwater Mountains and along the Mono-Mineral County line, and a few of them could squeeze out light rain at times through this evening.

Spring is definitely in the air!

#CAwx #NVwx

Beautiful day today here in Oregon!

( #NWSMedford): Data suggests that current snow depths and snow water equivalents (SWE) for the Crater Lake area are in RECORD LOW territory. The graphic shows the SWE for Annie Springs, and on March 28 it is at 22% of the April 19th median peak. More snow is forecast in early April. #CAwx #ORwx #Wx

Graph of snow water equivalent in the state of Colorado for 2026 relative to climatological statistics since the 1980s. 2026 is current a record low around peak conditions typically in March and April.

When we should be approaching the peak accumulation in snowpack across the West, conditions have instead further rapidly deteriorated.

Another way to look at it: Colorado’s snow water equivalent has already reached a level that wasn’t seen until about a MONTH later in the previous worst record.

Twinning! Something important is going on this week that will have world-wide implications!
Like an egg splitting in half, a tropical wave gives birth twin tropical #cyclones in the Equatorial Pacific. Notice how one spins clockwise I the Northern Hemisphere, the other counterclockwise SH… 1/

Global sea-surface temperatures set yet another new daily record, with the preliminary temperature coming in at 21.149°C yesterday.

The hottest SST on record is 21.173°C, set on Apr. 24, 2024.

Will a new record high SST be set this year? The Climate 8-Ball is protesting.

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📷: Catie Corrigan, "Beautiful sun dog at Smugglers' Notch Vermont!"

Line graph time series of cumulative glacier mass balance relative to 1970 for the period of 1950 to 2025. There is a long-term decreasing trend through the entire time series.

🚨 My graphic showing cumulative change in the mass of reference glaciers around the world has now been updated with 2025's data. We are rapidly losing ice.

Graphic available at: zacklabe.com/climate-chan.... More info: wgms.ch/global-glaci...

Total precipitation for March 2026 through the 27th. #PAwx

The area in blue has had over 4 inches so far this month.

6.18" in Pittsburgh is the wettest March on record!

1.90" in Philadelphia would be the 16th driest March if no more precip is recorded & would be the driest March since 2012.

7 am EDT/6 am CDT Saturday morning (March 28) #USwx #TEMPERATURES #wx #wxsky

( #NWSCLE): ⚠️🌪️ An NWS survey confirmed an EF-1 #tornado with a maximum wind speed of 95 mph and a maximum width of 75 yards northeast of Mount Gilead, #Ohio Thursday evening, causing extensive tree damage and destroying an outbuilding www.weather.gov/cle/pns_all

#OHwx #wx #wxsky

( #NWSCLE) ⚠️🌪️ An NWS survey confirmed a brief EF-0 #tornado with a maximum wind speed of 75 mph and a maximum width of 20 yards northwest of Green Valley, #Ohio Thursday evening, ripping off part of a barn metal roof, with debris scattered across a field www.weather.gov/cle/pns_all

#OHwx #wx #wxsky

( #NWSILN): Here is our event summary webpage from Thursday evening's severe storms: www.weather.gov/iln/20260326

#Ohio #OHwx #tornado #wx #wxsky

NWS confirms 3 tornadoes touched down in central Ohio during Thursday storms The National Weather Service confirmed tornadoes that touched down in Hardin, Morrow and Knox counties Thursday night during strong storms.

🌪️ Severe storms produced three confirmed tornadoes Thursday night. #OHwx

www.10tv.com/article/news...

Graphic showing the spring leaf index anomaly for March 27, 2026 for the contiguous United States, with spread arriving very early in central and western areas and late in the southeast.

Spring is arriving across much of the West more than 20 days earlier than average when looking at when plants first leaf-out - even reaching almost to Canada! I'd expect significant ecological impacts from the heat this March.

Graphic/data from @usa-npn.bsky.social: www.usanpn.org/data/maps/sp...

( #NWSFairbanks): As of yesterday, March 26th, #Fairbanks is in 1st place for the COLDEST March so far since 1959!

The mean avg temp was -11.8F, beating the 2nd place value by almost 2 whole degrees. With a warm up expected this weekend, do you think we’ll stay at number 1? #AKwx 👀

#wx #wxsky

An unusually active and destructive start to the tornado season in the northern U.S. has many Canadians wondering what's in store north of the border.

Watch more video: https://ow.ly/XrYc50YzWMC

March 27: Here are three graphics that highlight why there is rising concern regarding the prospect of difficult wildfire activity in the months to come.

- Widespread drought
- Very dry soils
- Well below normal Western US snowpack (water equivalent)

This is on top of continued anomalous heat.

( #NWSGSP): Skipping Spring and leaping into Summer to start April.

#SCwx #NCwx #GAwx #USwx #wx #wxsky

( #NWSCPC): Heavy rainfall and thunderstorms are forecast from eastern portions of the Southern Plains and Lower Mississippi Valley northeast towards the Great Lakes region during the first half of week-2. This is associated with a low pressure system and adequate Gulf moisture. #USwx #wx #wxsky

From March 15 through March 26 there have been...
More than 100 monthly records & more than 700 daily records broken or tied.

Since March 1 there have been more than 1,100 daily records broken or tied across the nation.

Some record heat will remain through the weekend for areas of the Southwest.

GFS model forecast of the departure of winds at 850 mb from average over a latitude band from 5°S to 5°N.

A super-strength westerly wind burst is predicted for late next week, accompanied by twin tropical cyclones in the Northern and Southern Hemisphere, which should push us well on the way to El Niño. Huge 850 mb wind anomalies in excess of 15 m/s (33 mph) predicted near the Dateline.

Friday, March 27 Donner Pass snow (or lack thereof report). This is bad.