Why Do Different Weather Apps Have Different Forecasts?

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iStock

People have been trying to predict the weather for thousands of years. You’d think that by now we’d have it sorted out—yet open three different weather apps on your phone and you’ll probably find three slightly different forecasts. How hard can it be to get the weather right?

Pretty hard. Even weather experts agree that meteorology is “an art as much as a science.” Our instruments have come a very long way since the weather rock, and computer modeling allows us to capture and process huge quantities of data. Ultimately, though, a forecast comes down to one thing: the forecaster’s judgment.

Weather apps are like weather reports on TV, which never seem to match up, either. That’s because each app or station uses its own systems and formulas to predict the meteorological future.

Meteorologist Jeff Masters is the founder of Weather Underground. “You start with the same fundamental mathematical equations that govern the motion of the atmosphere,” he told The Virginian Pilot. “But the coding is different.”

Every forecaster starts with the same raw data, a “firehose” of information pouring in from satellites, radar, and weather stations around the world. From there, they have to decide how to process that data, and which variables will be relevant for any given situation.

No matter what channel you watch, site you visit, or app you download, you’re going to have to make room for a little error. Meteorologists call their forecasts “guidance,” not “the future.”

Some apps’ guidance hits the mark more often than others, but the best weather app for you depends on what you want.

The Weather Underground app (iOS, Android) is free and super-detailed. The Weather Channel (iOS, Android) is also free but focuses more on social media, allowing users to share weather updates with friends. Dark Sky ($3.99, iOS, Android) is hyperlocal and immediate, focused only on the present moment and the next few hours. For true weather nerds, there’s RadarCast Elite ($1.99, iOS), which offers high-definition radar imaging so you can watch that pressure system roll in.

[h/t The Virginian Pilot]

6 Protective Mask Bundles You Can Get On Sale

pinkomelet/iStock via Getty Images Plus
pinkomelet/iStock via Getty Images Plus

Daily life has changed immeasurably since the onset of COVID-19, and one of the ways people have had to adjust is by wearing protective masks out in public places, including in parks and supermarkets. These are an essential part of fighting the spread of the virus, and there are plenty of options for you depending on what you need, whether your situation calls for disposable masks to run quick errands or the more long-lasting KN95 model if you're going to work. Check out some options you can pick up on sale right now.

1. Cotton Face Masks; $20 for 4

Protective Masks with Patterns.
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This four-pack of washable cotton face masks comes in tie-dye, kids patterns, and even a series of mustache patterns, so you can do your part to mask germs without also covering your personality.

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2. CE- and FDA-Approved KN95 Mask; $50 for 10

A woman putting on a protective mask.
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You’ve likely heard about the N95 face mask and its important role in keeping frontline workers safe. Now, you can get a similar model for yourself. The KN95 has a dual particle layer, which can protect you from 99 percent of particles in the air and those around you from 70 percent of the particles you exhale. Nose clips and ear straps provide security and comfort, giving you some much-needed peace of mind.

Buy it: $50 for 10 (50 percent off)

3. Three-Ply Masks; $13 for 10

Woman wearing a three-ply protective mask.
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These three-ply, non-medical, non-woven face masks provide a moisture-proof layer against your face with strong filtering to keep you and everyone around you safe. The middle layer filters non-oily particles in the air and the outer layer works to block visible objects, like droplets.

Buy it: $13 for 10 (50 percent off)

4. Disposable masks; $44 for 50

A batch of disposable masks.
Odash, Inc.

If the thought of reusing the same mask from one outing to the next makes you feel uneasy, there’s a disposable option that doesn’t compromise quality; in fact, it uses the same three-layered and non-woven protection as other masks to keep you safe from airborne particles. Each mask in this pack of 50 can be worn safely for up to 10 hours. Once you're done, safely dispose of it and start your next outing with a new one.

Buy it: $44 for 50 (41 percent off)

5. Polyester Masks; $22 for 5

Polyester protective masks.
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These masks are a blend of 95 percent polyester and 5 percent spandex, and they work to block particles from spreading in the air. And because they're easily compressed, they can travel with you in your bag or pocket, whether you're going to work or out to the store.

Buy it: $22 for five (56 percent off)

6. Mask Protector Cases; $15 for 3

Protective mask case.
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You're going to need to have a stash of masks on hand for the foreseeable future, so it's a good idea to protect the ones you’ve got. This face mask protector case is waterproof and dust-proof to preserve your mask as long as possible.

Buy it: $15 for three (50 percent off)

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Snow Kidding: A Polar Vortex Could Hit the Eastern U.S. This Month

You may not want to put your ice scraper away just yet.
You may not want to put your ice scraper away just yet.
Tamara Dragovic/iStock via Getty Images

If you’re in the eastern U.S. and planning some gardening sessions, you might want to double-check the forecast. According to the Washington Post, a polar vortex like the one that hit the U.S. in 2019 is lurking and prepared to unleash chilly air in the eastern half of the country. Some areas can even expect snow—in Pennsylvania, maybe as much as an inch.

Powder is expected in the Northeast and Mid-Atlantic areas, with cool temperatures spreading from the Upper Midwest to New England, which might see a topcoat of snow beginning this weekend. Georgia might get some frost. The cold front could experience 20-degree reductions in temperatures, with Minneapolis dropping into the upper 40s and Chicago seeing 45°F.

Areas like Providence, Rhode Island; Hartford, Connecticut; and Boston—normally in the 60s this time of year—might not climb out of the 40s over the weekend. New York City, which has been enjoying temperatures in the 70s, won’t get out of the 50s.

Blame the peculiar weather on the polar vortex, which may be best described as an arctic hurricane that transports freezing air south when warm weather pushes it out of northern Canada, Alaska, or Greenland. In other words: There’s no rush on installing that air conditioner just yet.

[h/t Washington Post]