Matthew Cappucci (@matthewcappucci) 's Twitter Profile
Matthew Cappucci

@matthewcappucci

Atmospheric scientist, storm chaser, adventurer, teacher, author. Senior meteorologist at @MyRadarWX. @Washingtonpost, @Wamu885, @NPR, TV too. @Harvard/MIT šŸŒŖ

ID: 2579614256

linkhttps://www.simonandschuster.com/books/Looking-Up/Matthew-Cappucci/9781639362011 calendar_today21-06-2014 01:55:22

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The National Hurricane Center now expects Francine to make landfall as a Category 2 hurricane in southern Louisiana. Hereā€™s our latest:

Matthew Cappucci (@matthewcappucci) 's Twitter Profile Photo

Hello from first class! (Another complimentary upgradeā€¦ thatā€™s like 9 this year! šŸ˜ƒ) On my way to New Orleans, where I have a truck waiting for me. Then itā€™s down to Houma. (The MyRadar Weather app includes aviation charts, and yepā€¦ looking like a bump flight down.)

Hello from first class! (Another complimentary upgradeā€¦ thatā€™s like 9 this year! šŸ˜ƒ)

On my way to New Orleans, where I have a truck waiting for me. Then itā€™s down to Houma.

(The <a href="/MyRadarWX/">MyRadar Weather</a> app includes aviation charts, and yepā€¦ looking like a bump flight down.)
Matthew Cappucci (@matthewcappucci) 's Twitter Profile Photo

Air pressure is down into the 980s, and weā€™re seeing the wind field pick up a bit to the east of the center. Aircraft reconnaissance has also found that the center is about 6Ā° warmer at flight level than surrounding airā€¦ so #Francine is strengthening.

Air pressure is down into the 980s, and weā€™re seeing the wind field pick up a bit to the east of the center. 

Aircraft reconnaissance has also found that the center is about 6Ā° warmer at flight level than surrounding airā€¦ so #Francine is strengthening.
MyRadar Weather (@myradarwx) 's Twitter Profile Photo

Notice the chart on the bottom ā€” the fact that thereā€™s a 6 degree warmup in Francineā€™s center is indicative of the ā€œchimneyā€ effect of tropical cyclones. Heat energy flows toward the middle of the storm and rises. Thatā€™s why hurricanes are called ā€œwarm coreā€ systems.

Notice the chart on the bottom ā€” the fact that thereā€™s a 6 degree warmup in Francineā€™s center is indicative of the ā€œchimneyā€ effect of tropical cyclones.

Heat energy flows toward the middle of the storm and rises. Thatā€™s why hurricanes are called ā€œwarm coreā€ systems.
Matthew Cappucci (@matthewcappucci) 's Twitter Profile Photo

If anyone else in Houma, Louisiana is in a waffle-y mood, Iā€™m going to Waffle House at 7 p.m. CT. Come with weather antics or questions!

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I am on the ground in Louisiana and en route to Houma tracking #Francine for MyRadar Weather. Latest infrared satellite imagery depicted two convective bursts as thunderstorms spout near the core. Still some issues with dry air entrainment inhibiting faster intensification.

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Air pressure is falling, which means #Francine is strengthening. With each successive pass, the Hurricane Hunters are finding slightly lower air pressures. That means Francine is lifting more air up and away, causing a stronger vacuum effect to pull in stronger winds.

Air pressure is falling, which means #Francine is strengthening. With each successive pass, the Hurricane Hunters are finding slightly lower air pressures.

That means Francine is lifting more air up and away, causing a stronger vacuum effect to pull in stronger winds.
Matthew Cappucci (@matthewcappucci) 's Twitter Profile Photo

Breaking: #Francine is now a Category 1 #hurricane. A Hurricane Hunters plane has found a sharp drop in air pressure and an uptick in winds east of the center. The storm is poised to strengthen, perhaps significantly, over the next 18 hours before plateauing near landfall.

Breaking: #Francine is now a Category 1 #hurricane.

A Hurricane Hunters plane has found a sharp drop in air pressure and an uptick in winds east of the center.

The storm is poised to strengthen, perhaps significantly, over the next 18 hours before plateauing near landfall.
Matthew Cappucci (@matthewcappucci) 's Twitter Profile Photo

Worth noting that Francine also has continued convective bursts, or thunderstorm flareups, over its organizing core/eye. That means thunderstorms/latent heat are lifting air up and away from the vortex, allowing a greater air deficit and inward vacuum effect (stronger winds).