{ "number": 922, "headline": "April 20, 2026 Monday Spring Weather", "standfirst": "Chilly day across Great Lakes and Northeast but warming trend through week", "desk": "notebook", "dateline": { "place": "Weather Trader", "state": null, "lat": null, "lon": null, "site_key": null, "site_name": null, "site_url": null, "accent": null }, "edition": "2026-04-20", "published": "2026-04-20T13:34:25.273000Z", "updated": null, "access": "free", "body_html": "
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Yes, it\u2019s still snowing a LOT across the Rockies and Canada as Pacific moisture encounters the still powerful Arctic \u201cpolar vortex\u201d spinning over Hudson Bay. Some of that light snowfall will reach New England during the week, too. Upwards of 2-feet of snow in Saskatchewan!

Good news is that the California Sierra and the Great Basin of the Western U.S. needs whatever precipitation comes whether it\u2019s rain or snow.

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Beautiful \u2014 sunny and crips morning across the Southeast, Great Lakes, and central Mississippi River Valley!

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This is post number 922: Good Morning! Day 110 of 2026.

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

Weather Trader is an entirely reader-supported publication. Thank you to paid subscribers who support this newsletter and development behind the scenes. ALL content is generated by Ryan (not A.I.) including the maps.

High Temperatures Today | Monday April 20, 2026

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169 million at least 70\u00b0F \u2026 but the Great Lakes and Northeast remains chilly mainly in the 40s

Low Temperatures on Tuesday

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Still 42 million below freezing with only 20s in Pennsylvania, around NYC, and into New England. Brrr!

High Temperatures Tuesday Morning | Warming Trend!

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Widespread 70s for 2/3 of the Lower 48 (66% real estate) \u2026 but population of Northeast not participating with 40s and 50s (still)

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RTMA Current Temperature Analysis | 8:30 AM ET

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Lower 48 average was only 43.3\u00b0F

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RTMA Current Temperature Anomaly Analysis | 8:30 AM ET

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Lower 48 was -2.8\u00b0F BELOW normal with eastern U.S. cool / chilly

Quick Tropical Update | Atlantic Basin | Next 6-days Precipitable Water

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Cold fronts still reaching well into the Atlantic including Bahamas with dry air to about 25\u00b0N latitude. The ITCZ is depressed to the equator or 5\u00b0N latitude into the end of April climatologically, so we don\u2019t expect any tropical waves to develop out in the Main Development Region (MDR) until late June or early July.

The Western Pacific is quiet again after massive Super Typhoon Sinlaku has become post-tropical and merged with the mid-latitude westerlies.

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Nothing else on the horizon for next 10-days+ in the Western Pacific

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Lower 48 Weather Today | Monday

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3 main areas of precipitation today: California, Texas, and New England, but no severe weather is expected \u2014 good news for April 20th.

HRRR 06z \u2014 Radar Simulation Next 48-hours to Wednesday 2 AM ET

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More very welcome rainfall across Texas. Same for California \u2014 should also be heavy snowfall in the Sierra. Scattered light rain or snow showers in New England this evening!

HRRR 06z Precipitable Water Next 48-hours (my favorite parameter)

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Cold front actually entirely clears South Florida with easterly flow across the peninsula. Cold and dry air pushes from the Great Lakes through the Northeast into Tuesday.

Weather on Tuesday \u2014 unsettled across the Western U.S.

Warming trend across the Great Lakes, and soon the Northeast with warmer southerly flow replacing the Arctic \u201cpolar vortex\u201d influenced weather pattern

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NDFD NWS Total Precipitation Next 72-hours through Thursday Morning

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NWS Snowfall Next 72-hours \u2014 through Thursday Morning

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ECMWF 06z | Forecast 6-days of Precipitable Water (my favorite parameter!)

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Atmospheric river impacting the California coast into Wednesday (welcome precipitation)

Southerly flow picks up steam during week with much warmer air out of the Gulf of Mexico = convection/storms.

The next major storm on Friday tracks out of the Dakotas into Canada with heavy snow on the backside around Saskatoon.

ECMWF 06z Precipitation Type + Intensity | Next 6-days

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Strong \u201cwinter weather\u201d storm systems for Canada but the lows tracking so far northward means little dynamics/energy for the trailing cold fronts \u2014> lack of rainfall and storms for the Southeast where we need the moisture badly.

Moisture Transport (IVT) next 10-days

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Next best chance for heavy rain in the Deep South and Southeast will be early next week, but that won\u2019t cover the ongoing and growing deficit (and drought)

Total Precipitation Next 10-days | Blend of Models

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Blend of Models | Total Snowfall Next 10-Days

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ECMWF AIFS 06z next 10-days of 500 mb Height Anomaly

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Certainly no sustained \u201cheat domes\u201d going into May \u2026 instead we have multiple mobile troughs influencing the Lower 48 from coast to coast = unsettled and cooler to the north with typical spring warmth and humidity in Texas and the Southeast.

Blend of Models Temperatures | Highs through Tuesday, April 28

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Warming trend through this week before another brief cool down with next passing front \u2026 comfortable heading into end of April.

Blend of Models Temperatures | Lows through Tuesday, April 28

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ECMWF AIFS 06z | Temperature at 500 mb | Next 10-days

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The tropospheric polar vortex is still showing -40\u00b0C contour over Arctic Canada through end of April \u2014 impressive! Lobes are pulled southward with passing trough/shortwave disturbances = unsettled and cooler pattern ahead.

Snowfall from ECMWF HRES (15-days)

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Temperature Anomaly | Next 15-days | ECMWF EPS 00z Ensemble Mean

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Week #1 | Temperature Anomaly | April 20 - April 26

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Week #2 | Temperature Anomaly | April 27 - May 3

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April 7: 2026 Atlantic Seasonal Hurricane Forecast: 11/5/2 9-13 Named Storms (11 most likely)
4-7 Hurricanes (5 or 6 most likely)
1-3 Major Hurricanes (2 most likely)

ACE: 75-85

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": "

Yes, it\u2019s still snowing a LOT across the Rockies and Canada as Pacific moisture encounters the still powerful Arctic \u201cpolar vortex\u201d spinning over Hudson Bay. Some of that light snowfall will reach New England during the week, too. Upwards of 2-feet of snow in Saskatchewan!

Good news is that the California Sierra and the Great Basin of the Western U.S. needs whatever precipitation comes whether it\u2019s rain or snow.

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