{ "number": 898, "headline": "March 16, 2026 Monday Weather Update", "standfirst": "Two very cold mornings on the way as winter hangs on to the bitter end", "desk": "winter", "dateline": { "place": "Weather Trader", "state": null, "lat": null, "lon": null, "site_key": null, "site_name": null, "site_url": null, "accent": null }, "edition": "2026-03-17", "published": "2026-03-17T01:58:54.987000Z", "updated": null, "access": "free", "body_html": "
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A major Arctic blast has swept through the Eastern U.S. through the Gulf of Mexico. We\u2019ll see only slow moderation until Thursday. Meanwhile, a record strong \u201cheat dome\u201d builds over the Southwest and Western U.S. into this weekend.

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850 mb Temperature Anomaly

This is post number 898: Good Evening! Day 75 of 2026.

Author: Dr. Ryan Maue (X @RyanMaue X @weathertrader)

Weather Trader is an entirely reader-supported publication. To receive all new posts [daily] via email or the Substack App, and support our work, consider becoming a paid subscriber \u2014 ALL content is generated by Ryan (not A.I.) including the maps. [Spring 2026 Coupon Offer]

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Weather This Evening \u2014 cold front sweeping off the East Coast \u2026

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Heavy snowfall on the backside of the low pressure center moving through western PA and New York this evening. Gusty winds with thunderstorms along the secondary cold front.

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HRRR next 18-horus \u2014> Tuesday 1 PM ET shows rapid clearing into sunrise.

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Lake Effect Snowfall machine turned back on across the Great Lakes in addition to system snow as blizzard moves into Canada

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Blend of Models | Total Snowfall Next 7-Days

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Blend of Models | 7 Days Precipitation Total

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HRRR 18z \u2014 Radar Simulation Next 48-hours to Wednesday 2 PM ET

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Next weather maker is a weak Clipper system into the Great Lakes late Tuesday.

NDFD NWS Total Precipitation Next 72-hours through Thu Evening

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NWS Snowfall Next 72-hours \u2014 through Thursday Evening

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RTMA Current Temperature Analysis | 9:15 PM ET

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RTMA Current Temperature Anomaly Analysis | 9:15 PM ET

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Lower 48 is -9.0\u00b0F below normal

RTMA Current Temperature 24-hour Change | 9:15 PM ET

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Large area of more than 40\u00b0F colder temperatures from 24-hours prior in the Great Lakes, Ohio River Valley into the Southeast almost to the Gulf Coast, and back into South Texas.

ECMWF 18z Precipitation Type + Intensity | Next 6-days

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Western U.S. | Heat Dome

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Temperature Anomaly Next 6-days

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Blend of Models Temperatures | Highs through Wednesday, March 25

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Blend of Models Temperatures | Low through Wednesday, March 25

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Freeze to the Gulf Coast on Tuesday and Wednesday

Next 6-days of Precipitable Water (my favorite parameter)

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Tuesday Low Temperatures

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183 million below freezing

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Tuesday High Temperatures

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Wednesday Low Temperatures

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179 million still below freezing

Chicago next 7-Days

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Washington D.C. next 7-days

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Atlanta next 7-days

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Phoenix next 7-days \u2014 108\u00b0F \u2014 RECORD HOT peaks on Friday

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\u00b0ECMWF AIFS 18z | Temperature at 500 mb | Next 10-days

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Snowfall | Median of ECMWF Ensembles at 12z | Next 15-days

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Probability of at least 3\u201d of Snowfall Next 15-days

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Temperature Anomaly | Next 15-days | ECMWF EPS 12z Ensemble Mean Flagship

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Ridge \u2014> A major heat dome develops across the Western U.S.

Trough \u2014> Very cold air for mid-March blasts out of Canada into the eastern U.S.

Extreme cold over Alaska continues through Week 2

5-Day Chunk #1 | Temperature Anomaly | March 16 - March 20

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5-Day Chunk #2 | Temperature Anomaly | March 21 - March 25

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5-Day Chunk #3 | Temperature Anomaly | March 26 - March 30

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Maps sourced from weathermodels.com designed and innovated by yours truly! Please subscribe there for real-time access to the newest maps, charts from all of the weather models including ECMWF and AIFS, and NOAA GFS/GEFS. NOAA WPC and SPC for fronts/convective outlooks.

", "body_key": null, "teaser_html": "

A major Arctic blast has swept through the Eastern U.S. through the Gulf of Mexico. We\u2019ll see only slow moderation until Thursday. Meanwhile, a record strong \u201cheat dome\u201d builds over the Southwest and Western U.S. into this weekend.

Weather This Evening \u2014 cold front sweeping off the East Coast \u2026

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