Skip to content
Go to Home Page
News

What Exactly Is a 'Bomb Cyclone' Anyway?

Jan. 04, 2018
•
2 min read
US-WEATHER-WINTER STORM
What Exactly Is a 'Bomb Cyclone' Anyway?
The cards we feature here are from partners who compensate us when you are approved through our site, and this may impact how or where these products appear. We don’t cover all available credit cards, but our analysis, reviews, and opinions are entirely from our editorial team. Terms apply to the offers listed on this page. Please view our advertising policy and product review methodology for more information.

Much of the US east coast is being blanketed by a uniquely strong blizzard that's cancelling thousands of flights, wreaking havoc on car travel and clearing out the skies of nearly all air traffic. Everyone keeps referring to this storm using the catchy "bomb cyclone" term. So, for those wondering, let's explore exactly what a "bomb cyclone" is.

"Bomb cyclone" is a meteorological term that's the combination of two meteorological terms. So, let's break it down:

Cyclone: Simply speaking, a cyclone is just a big spinning storm with a low-pressure center. A hurricane (or typhoon if it's in the South Pacific or Indian Ocean) is perhaps the most recognizable cyclone. But, unlike a hurricane, a generic cyclone doesn't have to be in tropical/subtropical waters and have a "closed, low-level circulation."

Bomb: This is the word that catches everyone's attention — in particular the TSA agent near you when you complain about your flight cancellation. This term refers to a storm that undergoes a rapid intensification reflected as a drop in pressure of 24 millibars in 24 hours. The lower the pressure, the stronger the storm.

For reference, standard sea-level pressure is 1,013 millibars. 2017's Tropical Storm Emily made landfall in Florida at 1,005 millibars, just 8 millibars below the average. On the extreme end of the spectrum, Hurricane Maria was the 10th most intense hurricane ever with 908 millibars. All of that to say: a drop of 24 millibars is quite substantial.

The United Kingdom's Met Office — equivalent of the National Weather Service in the US — has perhaps the best 90-second explanation and illustration of a weather bomb:

Daily Newsletter
Reward your inbox with the TPG Daily newsletter
Join over 700,000 readers for breaking news, in-depth guides and exclusive deals from TPG’s experts

So, does the storm blanketing the Northeast qualify as a bomb cyclone? Turns out that it's practically the definition of one. Remember that the pressure only needs to drop 24 millibars in 24 hours. How did it do?

That's right; this overachieving storm more than doubled its goal. Dropping 59 millibars in 24 hours, the storm currently measured at 951 millibars, leaving the storm just 11 millibars higher than Superstorm Sandy was measured at landfall.

Thankfully though, this bomb cyclone is expected to stay off of the coast. And that's good as the storm effectively a "winter hurricane" — bringing strong winds and tall waves, but heavy snow instead of rain.

Featured image by AFP/Getty Images

TPG featured card

Best for dining at restaurants

American Express® Gold Card

Apply for American Express® Gold Card
Terms & restrictions apply. See rates & fees
TPG Editor‘s Rating
4 / 5
Go to review
Apply for American Express® Gold Card
at American Express's secure site

Rewards

1 - 4X points

Intro offer

As High As 100,000 points. Find Out Your Offer.

Annual Fee

$325

Recommended Credit

Excellent to Good

Why We Chose It

There’s a lot to love about the Amex Gold. It’s a fan favorite thanks to its fantastic bonus-earning rates at restaurants worldwide and at U.S. supermarkets. If you’re hitting the skies soon, you’ll also earn bonus Membership Rewards points on travel. Paired with up to $120 in Uber Cash annually (for U.S. Uber rides or Uber Eats orders, card must be added to Uber app and you can redeem with any Amex card), up to $120 in annual dining statement credits to be used with eligible partners, an up to $84 Dunkin’ credit each year at U.S. Dunkin Donuts and an up to $100 Resy credit annually, there’s no reason that foodies shouldn’t add the Amex Gold to their wallet. These benefits alone are worth more than $400, which offsets the $325 annual fee on the Amex Gold card. Enrollment is required for select benefits. (Partner offer)

Pros

  • 4 points per dollar spent on dining at restaurants worldwide and U.S. supermarkets (on the first $50,000 in purchases per calendar year; then 1 point per dollar spent thereafter and $25,000 in purchases per calendar year; then 1 point per dollar spent thereafter, respectively)
  • 3 points per dollar spent on flights booked directly with the airline or with amextravel.com
  • Packed with credits foodies will enjoy
  • Solid welcome bonus

Cons

  • Not as useful for those living outside the U.S.
  • Some may have trouble using Uber and other dining credits
  • You may be eligible for as high as 100,000 Membership Rewards® Points after you spend $6,000 in eligible purchases on your new Card in your first 6 months of Card Membership. Welcome offers vary and you may not be eligible for an offer. Apply to know if you’re approved and find out your exact welcome offer amount – all with no credit score impact. If you’re approved and choose to accept the Card, your score may be impacted.
  • Earn 4X Membership Rewards® points per dollar spent on purchases at restaurants worldwide, on up to $50,000 in purchases per calendar year, then 1X points for the rest of the year.
  • Earn 4X Membership Rewards® points per dollar spent at US supermarkets, on up to $25,000 in purchases per calendar year, then 1X points for the rest of the year.
  • Earn 3X Membership Rewards® points per dollar spent on flights booked directly with airlines or on AmexTravel.com.
  • Earn 2X Membership Rewards® points per dollar spent on prepaid hotels and other eligible purchases booked on AmexTravel.com.
  • Earn 1X Membership Rewards® point per dollar spent on all other eligible purchases.
  • $120 Uber Cash on Gold: Add your Gold Card to your Uber account and get $10 in Uber Cash each month to use on orders and rides in the U.S. when you select an American Express Card for your transaction. That’s up to $120 Uber Cash annually. Plus, after using your Uber Cash, use your Card to earn 4X Membership Rewards® points for Uber Eats purchases made with restaurants or U.S. supermarkets. Point caps and terms apply.
  • $84 Dunkin' Credit: With the $84 Dunkin' Credit, you can earn up to $7 in monthly statement credits after you enroll and pay with the American Express® Gold Card at U.S. Dunkin' locations. Enrollment is required to receive this benefit.
  • $100 Resy Credit: Get up to $100 in statement credits each calendar year after you pay with the American Express® Gold Card to dine at U.S. Resy restaurants or make other eligible Resy purchases. That's up to $50 in statement credits semi-annually. Enrollment required.
  • $120 Dining Credit: Satisfy your cravings, sweet or savory, with the $120 Dining Credit. Earn up to $10 in statement credits monthly when you pay with the American Express® Gold Card at Grubhub, The Cheesecake Factory, Goldbelly, Wine.com, and Five Guys. Enrollment required.
  • Explore over 1,000 upscale hotels worldwide with The Hotel Collection and receive a $100 credit towards eligible charges* with every booking of two nights or more through AmexTravel.com. *Eligible charges vary by property.
  • No Foreign Transaction Fees.
  • Annual Fee is $325.
  • Terms Apply.
Apply for American Express® Gold Card
at American Express's secure site
Terms & restrictions apply. See rates & fees
Best for dining at restaurants

American Express® Gold Card

TPG Editor‘s Rating
4 / 5
Go to review

Rewards Rate

4XEarn 4X Membership Rewards® points per dollar spent on purchases at restaurants worldwide, on up to $50,000 in purchases per calendar year, then 1X points for the rest of the year.
4XEarn 4X Membership Rewards® points per dollar spent at US supermarkets, on up to $25,000 in purchases per calendar year, then 1X points for the rest of the year.
3XEarn 3X Membership Rewards® points per dollar spent on flights booked directly with airlines or on AmexTravel.com.
2XEarn 2X Membership Rewards® points per dollar spent on prepaid hotels and other eligible purchases booked on AmexTravel.com.
1XEarn 1X Membership Rewards® point per dollar spent on all other eligible purchases.

  • Intro Offer

    As High As 100,000 points. Find Out Your Offer.

  • Annual Fee

    $325

  • Recommended Credit

    Excellent to Good

Why We Chose It

There’s a lot to love about the Amex Gold. It’s a fan favorite thanks to its fantastic bonus-earning rates at restaurants worldwide and at U.S. supermarkets. If you’re hitting the skies soon, you’ll also earn bonus Membership Rewards points on travel. Paired with up to $120 in Uber Cash annually (for U.S. Uber rides or Uber Eats orders, card must be added to Uber app and you can redeem with any Amex card), up to $120 in annual dining statement credits to be used with eligible partners, an up to $84 Dunkin’ credit each year at U.S. Dunkin Donuts and an up to $100 Resy credit annually, there’s no reason that foodies shouldn’t add the Amex Gold to their wallet. These benefits alone are worth more than $400, which offsets the $325 annual fee on the Amex Gold card. Enrollment is required for select benefits. (Partner offer)

Pros

  • 4 points per dollar spent on dining at restaurants worldwide and U.S. supermarkets (on the first $50,000 in purchases per calendar year; then 1 point per dollar spent thereafter and $25,000 in purchases per calendar year; then 1 point per dollar spent thereafter, respectively)
  • 3 points per dollar spent on flights booked directly with the airline or with amextravel.com
  • Packed with credits foodies will enjoy
  • Solid welcome bonus

Cons

  • Not as useful for those living outside the U.S.
  • Some may have trouble using Uber and other dining credits
  • You may be eligible for as high as 100,000 Membership Rewards® Points after you spend $6,000 in eligible purchases on your new Card in your first 6 months of Card Membership. Welcome offers vary and you may not be eligible for an offer. Apply to know if you’re approved and find out your exact welcome offer amount – all with no credit score impact. If you’re approved and choose to accept the Card, your score may be impacted.
  • Earn 4X Membership Rewards® points per dollar spent on purchases at restaurants worldwide, on up to $50,000 in purchases per calendar year, then 1X points for the rest of the year.
  • Earn 4X Membership Rewards® points per dollar spent at US supermarkets, on up to $25,000 in purchases per calendar year, then 1X points for the rest of the year.
  • Earn 3X Membership Rewards® points per dollar spent on flights booked directly with airlines or on AmexTravel.com.
  • Earn 2X Membership Rewards® points per dollar spent on prepaid hotels and other eligible purchases booked on AmexTravel.com.
  • Earn 1X Membership Rewards® point per dollar spent on all other eligible purchases.
  • $120 Uber Cash on Gold: Add your Gold Card to your Uber account and get $10 in Uber Cash each month to use on orders and rides in the U.S. when you select an American Express Card for your transaction. That’s up to $120 Uber Cash annually. Plus, after using your Uber Cash, use your Card to earn 4X Membership Rewards® points for Uber Eats purchases made with restaurants or U.S. supermarkets. Point caps and terms apply.
  • $84 Dunkin' Credit: With the $84 Dunkin' Credit, you can earn up to $7 in monthly statement credits after you enroll and pay with the American Express® Gold Card at U.S. Dunkin' locations. Enrollment is required to receive this benefit.
  • $100 Resy Credit: Get up to $100 in statement credits each calendar year after you pay with the American Express® Gold Card to dine at U.S. Resy restaurants or make other eligible Resy purchases. That's up to $50 in statement credits semi-annually. Enrollment required.
  • $120 Dining Credit: Satisfy your cravings, sweet or savory, with the $120 Dining Credit. Earn up to $10 in statement credits monthly when you pay with the American Express® Gold Card at Grubhub, The Cheesecake Factory, Goldbelly, Wine.com, and Five Guys. Enrollment required.
  • Explore over 1,000 upscale hotels worldwide with The Hotel Collection and receive a $100 credit towards eligible charges* with every booking of two nights or more through AmexTravel.com. *Eligible charges vary by property.
  • No Foreign Transaction Fees.
  • Annual Fee is $325.
  • Terms Apply.