Weatherman Will

I am extremely honored to accept NOAA's William M. Lapenta Scholarship this summer! I'll be working at the NWS National Hurricane Center alongside Maria Torres and the Public Affairs Team communicating crucial tropical wx information. Thank you @NOAA for this opportunity!

65°F to heavy snow...in HOURS. That's what millions of people experienced as yesterday's potent cold front dashed across the Eastern U.S. Specifically, the heavy snowfall seen across the Northeast was caused by an "Ana-front", which allows snow to develop on the back side of cold fronts for hours. @willcanowx explains why yesterday's example was a rare — yet superb — case of the phenomenon.

🌡️ A powerful heat dome is expected to build across parts of the western U.S. Some cities in the West & Southwest could approach 100° nearly two months ahead of schedule, potentially challenging early-season records. MyRadar's @willcanowx breaks down the setup.

@amarkowitzWX May @MatthewCappucci be with your soul 😇

Welp the Waffle House Challenge has officially commenced. My goal is to do a 1 waffle per hour pace and get out in 12. I’ve been dreading this day but ngl the first one was kinda good. Pray for me.

HOLY SH*T THE ILLINOIS STATE RECORD HAILSTONE OF FIVE INCHES IN DIAMETER HAS BEEN FOUND NW OF BUCKINGHAM WE DID IT @MyRadarWX

NEW: A Level 4 out of 5 severe weather risk has been introduced in the red zone across portions of north central Illinois and adjacent western Indiana. Several tornadoes, including a couple strong and/or long -track, are expected.

TUESDAY: A broad, multi-faceted severe weather event is likely Tuesday from the Midwest to the Rio Grande. Damaging gusts, very large hail and a couple tornadoes, some significant, are expected. Senior meteorologist @MatthewCappucci has a severe weather briefing.

From meteorologist @MatthewCappucci: TUESDAY, MARCH 10 – I'm growing increasingly concerned about southeast Iowa, central/northern Illinois and northwest Indiana. That's where we have a potentially worrisome setup. The tornado parameter is concerning. If any supercells become established, we could be talking the chance of a strong (EF3+) tornado near and just south of the warm front. That's where we have backed winds – out of the southeast. But at 10,000 feet, we have winds out of the west-southwest. That means winds basically entirely switch directions within the lowest 2 miles of the atmosphere. That will favor AMPLE rotation in the low levels... any storms that grow tall enough to feel those changing winds will rotate something fierce. Tennis ball-sized hail and a few tornadoes possible, especially near the warm front. MEANWHILE models are also spitting out up to 3,000 units of storm fuel. That would be a record... we haven't seen a value over 3,000 before MAY 7 in this area, so we're like 40-50 days early in terms of the amount of pent-up storm fuel we'll have. Explosive storm growth possible.

Check out the unique structure of this shelf cloud caught by @willcanowx this afternoon. As a squall line approached, some “SCUD” (Scattered Cumulus Under Deck) clouds made it look vertically-oriented as it passed overhead. 📸 - Ithaca, New York

When you drive across northeast Arizona, you'll change time zones 6 TIMES. It's all thanks to Daylight Saving Time — the semiannual changing of the clocks. It happens again tonight with "Spring Forward" at 2:00AM. @willcanowx explains the origins of DST below and wants to hear your thoughts: Should Daylight Saving Time stay or go?

On March 3, 2026, the Storm Prediction Center will adjust the format of its severe weather outlooks. A new “hatching” pattern will convey the INTENSITY of expected storm hazards — not just probability. @MatthewCappucci breaks down what to expect.

Check out my video!

Last week, @NHC_Atlantic released their Tropical Cyclone Report for Category 5 Hurricane Melissa. In their research, they found that Melissa's peak sustained winds were an estimated 190 MPH — a increase from the initial 185 MPH measurement. That ties Melissa with Hurricane Allen (1980) for the strongest hurricane, by wind speed, in Atlantic history. @willcanowx breaks down why updates like this are made, and what made Melissa so unique.

GFS nailed one storm and decided that was good enough 😂

RT @MyRadarWX: BREAKING: Melissa has been retroactively upgraded to 190 mph Category 5 – up from the 185 mph "operational" intensity assign…

Before some melting occurred, @willcanowx recorded ~7 inches of snow in Spring City, PA. Just 15 miles east? Norristown & Wayne, PA recorded over a foot. It goes to show what a stark gradient exists due to subsidence on the back side of coastal lows.

A day's worth of radar mosaic loop from the ongoing blizzard of February 2026 - lots of snow band action going on across the region:

Spring City, Pennsylvania is straddling the areas of subsidence to the west and a *heavy* deformation band to the east in Philly. @willcanowx breaks down the conditions for his 1:00 AM EST update. #blizzardof2026

@amarkowitzWX I think this is a great line Andrew. I’m in Spring City PA, just east, and I am sitting on the edge of moderate banding and no banding. Deep moisture is struggling to make it west enough for me, but at the same time we are still getting decent rates and I’m up to 6” here.

The western cutoff we’ve been nervously watching appears to be setting up roughly from the Chesapeake Bay to Berks County, PA. That’s your subsidence zone between banding as pivoting deformation bands hit a wall. If you’re east of that line, this will be a storm for the books.

How does light rain change to accumulating snow in a matter of minutes? “Dynamic Cooling” — and @willcanowx is in Spring City, PA to explain just how it works. #blizzardof2026

Follow my coverage for @MyRadarWX from southeast Pennsylvania as the #blizzardof2026 commences!