Sammy Hadi
@SammyHadiWx
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Meteorologist at @NWSMiami | @AMSEarlyCareer | FIU & Mississippi State Meteorology Alum | Graduate Certificates from UF & USF
Miami, FL
Joined November 2017
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Proud to announce that I am now a Meteorologist at
@NWSMiami
!
Excited to work alongside and learn from some great Meteorologists!
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As of 8pm this evening, we are now up to a staggering total of 95 individual Tornado Warnings issued for tornadic circulations in
#Beryl
today.
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Great example of an Island Sea-Breeze over Grand Bahama.
#WeatherExplained
#SciFriday
Thunderstorm cluster over Grand Bahama on Wednesday… photo from Jonathan Pharr
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What a stunning MCV over Oklahoma and the Texas Panhandle this morning.👀
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#WeatherExplained
: Birds often get trapped in the eye of formidable hurricanes and get carried long distances until the storm impacts land and weakens.
Here is an image from Hurricane Hermine in 2016. Image credit to Brad Panovich and Capital Weather Gang.
Over the past week, folks around Florida have photographed groups of wild flamingos. They are rare in Tampa Bay, but seeing them is a good thing.
The theory is that Hurricane Idalia swept up the pink birds and pushed them farther north than they intended to go.
Read more:
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A stationary front is forecast to dissipate across the Florida Straits late next week. Model guidance has hinted at the possibility of a weak tropical/subtropical system developing over the last several model cycles. This is a good reminder that hurricane season is almost here.
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#WeatherExplained
: Why are smaller tropical cyclones usually more intense than larger tropical cyclones?🌀
Let's take a look at the conservation of angular momentum by using two ice-skaters as an example.
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Radar and Warning Certified ✅
Radar Applications Course (RAC) ✅
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I’ve received the Certified AMS Teacher Designation from the American Meteorological Society!
I look forward to continuing to educate students and the public about weather and climate! ⛈
@ametsoc
@AMSEarlyCareer
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#WeatherExplained
: How the Central American Gyre (C.A.G.) may lead to some tropical development next week. Here is a simple explainer graphic in four steps!
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Merry Christmas Eve from the National Hurricane Center / NWS Miami 🎅🏼🎄
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#WeatherExplained
: How an Upper-Level Low (ULL) approaching the Florida Peninsula could lead to some strong to severe thunderstorms later today.
7/11 @ 5pm - Why the marginal risk of severe weather tomorrow? Check out this upper-level low currently moving over the NW Bahamas. This upper-low pressure system has colder temperatures aloft (-10 to -12 C at 500mb), which can promote strong to severe thunderstorm development.
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#WeatherExplained
: A breakdown of the IMME Ensemble 500mb Height Anomaly Forecast that has been trending on
#WxTwitter
over the last 24 hours.
This month's IMME Ensemble Mean 500mb height anomaly forecast for the peak of this yr's Atlantic Hurricane Season is downright ugly.
Blocking highs like this in SE Canada (🔴) are usually associated w/ more frequent hurricane landfalls on the US coastline.
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The future track of
#95L
will be dictated by the strength and intensity of the Bermuda High currently established across the subtropical Atlantic.
Two "camps of thought" persist on the euro ensembles; a stronger high will favor camp
#1
, a weaker high will favor camp
#2
.
Nice TEJ surge occurring right now carrying
#95L
with it. This will weaken and move the TUTT away from the Caribbean in the next few days, opening the door for a favorable upper-level pattern for 95L. Moister air than usual and high SSTs will remove many of the usual early
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#WeatherExplained
: What is the difference between Landspouts and Tornadoes? Here is a simple diagram highlighting the main differences:
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#WeatherExplained
: Hurricane Fiona and Puerto Rico's Terrain Explained.
1) Moist tropical airmass
2) Strong southerly winds into the southern side of the mountains
3) Air flowing up the mountains (upslope flow)
4) The moist air rises and creates convection (orographic lift)
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#Isaias
is currently exiting Andros Island a little further to the south than what was expected. Although this is a relatively small distance; it can make the difference later on between a landfall or a track just offshore.
A weaker system will be steered further to the west.
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Loop Archive: Hurricane
#Ian
's Journey from the Western Caribbean to landfall in Florida.🛰️
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#WeatherExplained
:
#Beryl
’s Quadrants
Due to Beryl’s angle of approach, the entirety of the island of Jamaica (including the capital, Kingston) will experience the worst quadrant of the storm.
Storm surge of 6-9 feet (NHC) & quick moving tropical tornadoes are possible today.
While looking sheared to hell and back on satellite,
#Beryl
's northern eyewall is packing winds of at least 120-125KT according to a new NOAA recon pass. Unfortunately, this quadrant is forecast to pass close to Jamaica later today, bringing intense impacts to the island nation.
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#WeatherExplained
: The Alpha, Bravo, and L-39 wildfires in the Florida Everglades created a few showers and thunderstorms this afternoon on an otherwise quiet afternoon. Satellite view on the left, conceptual diagram on the right.
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I’ve been appointed as an Ad-Hoc board member on the American Meteorological Society’s Board of Early Career Professionals. I’m excited and grateful to become a part of this important initiative.
@AMSEarlyCareer
@ametsoc
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Mesovorticies can occur in the eyewalls of intense Tropical Cyclones. As these vorticies move onshore, winds may be up to 10% stronger than the surrounding eyewall.
Pictured: Hurricane Michael, 2018
#TropicsTuesday
#WeatherExplained
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Monitoring a strengthening non-tropical low pressure system in the Gulf of Mexico as it approaches the Florida Peninsula overnight. Hazardous marine conditions and a few isolated strong/severe 🌩 possible tomorrow.
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Taking a look at the big picture view of Major Hurricane
#Beryl
this morning.
Beryl is nestled between 25-40 knots of southwesterly wind shear just to the west thanks to an T.U.T.T. over Colombia & a large plume of Saharan Dust to the east. The Bermuda High remains in control.
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Air Force 302 (Recon) recently investigated a primary band associated with
#Debby
. This band located just offshore is likely where the strongest winds of the system are currently located.
KTBW NEXRAD shows velocities of 70-90 mph are being picked up at 4,000-6,000 feet.
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A quiet
@NHC_Atlantic
and
@NWSMiami
today as we count down 30 days left until the start of the 2021 Atlantic Hurricane Season.
#flwx
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#WeatherExplained
: A diagram of the structure of a tornado as well as a quick look at the two main culprits of tornado production.
#Supercell
#QLCS
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Loop-Lapse: How a group of thunderstorms over Texas became Tropical Disturbance
#91L
over the Gulf of Mexico.
#WxExplained
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Shoutout to all my fellow NWS and Broadcast Meteorologists on shift this Thanksgiving! 🦃🥧
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Mesovortices visibly rotating in Hurricane
#Ida
's eyewall this morning. Mesovortices can bring locally enhanced winds 10% higher than the rest of the eyewall. These feature are present in only the most intense tropical cyclones.
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An important reminder! ⚠️ Models often change from run to run! Accuracy more than a few days out is fairly low. The best thing you can do today is work on getting your preparedness plan and supplies ready. By doing so, when a threat does materialize... you will be ready! 👍🏼
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Issued my first Severe Thunderstorm Warning (SVR) today at NWS Miami. Also had to Issue several Special Marine Warnings, Special Weather Statements (SPS), and Local Storm Reports as well. Widespread strong wind gusts (40-60mph) across South Florida today.
cc:
@capefish
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Appears to be some vortical hot towers firing near the center of
#Debby
at this hour.
Note the large feeder band moving across South Florida and the asymmetrical nature of the system.
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Weather Diagram: Revisiting the interaction between a Supercell and the Atlantic Sea-Breeze that lead to the development of an EF-2 in northern Palm Beach County last week.
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Climate Change 🌎 Experiment:
This experiment is used to demonstrate the heat-trapping gasses being released into our atmosphere from the bacteria organisms that will be released from the thawing and melting of Frozen Permafrost due to Climate Change.
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#WeatherExplained
: A brief lull in tropical activity in the Atlantic Basin is often observed in July. Why? This is due to large plumes of Saharan Dust that act to limit convection (as well as tropical) development as the dust particles move westwards in the brisk trade winds.
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🧵- There has been widespread discussion/speculation & “hot takes” on
#WxTwitter
about the current extended period of quiet in the Atlantic basin.
My message is to silence the noise and remain vigilant as we approach the peak of the season.
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The remnants of Hurricane
#Agatha
are a part of a larger feature called the
#CentralAmericanGyre
. This feature can serve as a precursor to the development of a tropical disturbance and the eventual designation of a tropical cyclone.
#WeatherExplained
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Infographic: United States Landfalls of the 2021 Atlantic Hurricane Season as of July 12th. Tropical Storms
#Claudette
,
#Danny
, and
#Elsa
.
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Loop: Tropical Storm
#Elsa
sent a potent outer-band into South Florida this afternoon. A great example of how impacts from Tropical Systems can occur well outside of the cone and center track. A message often repeated by the NHC, local NWS offices, and broadcast media.
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Tornado formation along the sea-breeze in Florida is more common than one would think. Radar loop (left) of the EF1 that occurred just north of Melbourne on Wednesday. Simplified diagram on the right.
A damage survey confirmed an EF-1 tornado touched down near South Patrick Shores June 7th. The tornado started near the Lighthouse Landing subdivision then moved ENE out over the Atlantic. It was on the ground for ~1 mile, had a max width of ~300 yards, & peak winds 90-100 mph.
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#WeatherExplained
: A impressive temperature gradient was observed between the east coast & inland suburbs of South Florida this morning but why?
With winds decoupling and becoming light overnight, location made all the difference. Our nearshore waters are in the low 70s.. (1/2)
Location made all the difference with lows across South Florida this morning.
How about a near-10F contrast between Key West and Big Pine Key!
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Two interesting features to talk about this afternoon in the East Caribbean Sea.
There appears to be some rotation present with both features this afternoon, with thunderstorm activity more prevalent in the disturbance south of Hispaniola.
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#WxTwitter
has been full of amazing pictures of Shelf Clouds; so what is the science behind Shelf Clouds?
#WeatherExplained
#ShelfClouds
A MUCH BETTER image of the Wichita, Kansas Thursday morning shelf cloud. 📸Lisa Rinehart
#kswx
@NWSWichita
@StormHour
@spann
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Working Tropical Operations for
#Ian
was definitely an experience at MFL I’ll never forget. I got to work with a great team here, next door at the NHC, and our neighboring NWS offices.
Southwest Florida is a resilient and amazing community and will bounce back from this.
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Looking at
#Iota
, you can see increased outflow (whispy upper level clouds) allowing for increased ventilation of the storm. Outflow creates divergence at the top, which allows for increased convergence below. The result? Iota will be a powerful Major Hurricane sooner than later.
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#WeatherExplained
: A plume of Saharan Dust is currently moving across the Tropical Atlantic. Here is how the Saharan Air Layer (S.A.L.) impacts tropical cyclones and sea surface temperatures?
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#WeatherExplained
: Tropical Cyclone Quadrants in the Northern Hemisphere.
#DYK
: The placement of the strongest and most intense winds is directly related to the forward motion of the storm? Here is Major Hurricane Iota from 2020.
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Update: A final count of 111 individual Tornado Warnings were issued for
#Beryl
yesterday.
We are also up to 15 tornado reports, however that number will certainty increase today as damage surveys are completed.
As of 8pm this evening, we are now up to a staggering total of 95 individual Tornado Warnings issued for tornadic circulations in
#Beryl
today.
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Every
#Hurricane
is an entirely different experience as no storm is 100% alike like another. Wind, flooding, surge, and tornadoes can all vary from storm to storm.
Here are side by side radar loops from Hurricane Ian in 2022 and Hurricane
#Idalia
in 2023.
Source:
@BMcNoldy
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Interested in working for the National Weather Service?
Aside from a Weather Forecast Office (WFO), you can also work at a Center Weather Service Unit (CWSU). A good fit if you enjoy aviation meteorology!
I’ve been cross-training to help fill shifts over here at CWSU Miami!
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A
#Derecho
is not an inland hurricane. Here are the differences between
#Derecho
events and Tropical Cyclones.
#WeatherExplained
#WxTwitter
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Currently in the
@NWS
Radar Application Course (RAC); RAC is an important step in the process of becoming certified to issue Severe Thunderstorm and Tornado Warnings.
Pictured: El Reno Tornado (2013) Case Study 🌪
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The anatomy of a Waterspout that came ashore in Aventura, Florida earlier today.
#WeatherExplainedWednesday
#MiamiWx
#flwx
Here’s another cool video of the Tornado that just came through here
@NWSMiami
@weatherchannel
@wsvn
@JohnMoralesNBC6
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As a hectic week comes to an end, I wanted to highlight the fantastic job WPC, NWS Miami, & local SFL broadcast media have done during this event. I’m very proud of the great collaboration/messaging during the event as well as the professionalism & proactiveness by our WFO team.
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Weather Explained Wednesday: Why do Kelvin-Helmholtz clouds form?
"If a warm (less dense) layer of air exists over a layer of colder ( more dense) air, and wind shear across the two layers is strong enough, eddies (waves) will develop along the boundary."
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#WeatherExplained
: A simple cross-section and explanation of the structure of a Tropical Cyclone.
#DYK
: The reason why the "eye" of an intense tropical cyclone is clear is due to subsidence! As air sinks and warms in the eye, it acts to prevent cloud formation!
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Why is there so much uncertainty early next week with Tropical Storm
#Elsa
? Because the two most reliable models (Euro and GFS) and their ensembles differ drastically. Two different solutions with the placement of the Bermuda High, land interaction, upper level environment, etc.
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A developing non-tropical low pressure system aided by a mid-level impulse will traverse across the Gulf of Mexico early next week. Pictured here is the 850mb winds on the 18z GFS indicating the potential of an southwesterly low level jet across the FL Peninsula.
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Regardless of whether it becomes tropical or not, the Area of Interest (AOI) in the Gulf of Mexico currently being monitored by the National Hurricane Center has the potential to bring significant rainfall and flooding to a portion of the Florida Peninsula this week.
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Why do Tropical Cyclones maintain intensity or even strengthen slightly inland over the Everglades?
Due to evaporation from "Wet" Soils, a.k.a. the Brown Ocean Effect.
#TD19
#WeatherExplained
#DYK
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The Saffir-Simpson Hurricane Wind Scale is used to rate tropical systems by maximum wind speed.
What is the strongest tropical cyclone you have experienced?
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#WeatherExplained
: Summertime Thunderstorms and the Cold Pool Explained in 5 Simple Steps.⚡️⛈️
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#WeatherExplained
: A check of Tropical Activity in the Tropical Atlantic this morning. With the enhanced phase of the MJO moving into the basin mid-month coinciding with the climatological increase in activity, we will likely see a return of activity over the next several weeks.
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8:30pm - Earlier as a nasty squall passed over the National Hurricane Center.
Although
#Eta
is primary a flooding threat, strong gusts (50-70mph) and quick spin-up tornadoes are possible tonight for South Florida.
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Mesoanalysis hints at why every storm currently across South Florida is rotating.
300-500 0-3km SRH, 40-60kts of bulk shear, and some enlarged hodographs indicate an environment favorable for supercells.
The dual threat of Flash Flooding and Tornadoes continues.
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#DoubleLoop
: 336 Days Apart, Two Major Hurricane Landfalls in Florida.
Hurricane
#Ian
(2022) and Hurricane
#Idalia
(2023)
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Q: Why is the eye of a Hurricane clear and calm?
A: In strong hurricanes, massive amounts of air move upwards via updrafts in the Eyewall. At the top of the storm, a portion of that air moves into the eye. The air begins to sink as it.. (1/2)
#AskaMeteorologist
#ScienceFriday
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Day 1 of the NWS Radar and Applications Course Workshop 📡
Shoutout to my teammate
@LexiChristineWx
from our neighbor
@NWSKeyWest
, my classmates, and all of the staff at NWS WDTD.
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Mesovorticies dancing around in the eye-wall of Major Hurricane
#Douglas
in the East Pacific.
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As we monitor the Western Caribbean for tropical mischief later this week, There are still unanswered questions about the long term setup.
Small changes/differences in these variables can have large implications for track and intensity of any potential system.
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By the way, the balloon just terminated at a height of 110,118 feet (Approximately 21 Miles above the surface) with a pressure of only 6.9 millibars.
#weatherexplained
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While this in a opinion piece, it’s important to provide some context.
- There is a *ranking system* for excessive rainfall that is standardized across the entire United States.
- There was well-in advance messaging/warning that this pattern wasn’t a regular summertime pattern.
Despite rain forecast, Miamians were caught off guard. Is it time for new warning system? | Opinion
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#Thread
: The NHC is now giving a 40% chance of tropical cyclone development over the next five days. The remnant moisture and vorticity from Hurricane Agatha *may* allow for the development of a new low pressure system north of Mexico.
May 30 @ 8 AM - NHC is monitoring an area near the Yucatan for a medium chance of tropical development later in the week. The South Florida forecast calls for a wet, unsettled weather pattern this week. This is a good reminder that hurricane season is about to start.
#flwx
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