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@NWSJacksonville

🌀 9/28 5AM Update Major Hurricane Ian

Potential Local Impacts:
☔️ Extensive & potentially extreme flash & river flooding
🌊 Life-threatening Storm Surge
🌬️ TS winds/Hurricane gusts
🌪️ Tornadoes

Rain has begun to move into our area. Finish up preparations!
#flwx #gawx #jaxwx

💧Torrential Rainfall & Flash Flooding Potential Today into Friday

Storm Total Rainfall:
* NE FL: 6-12", local 18" rainfall amounts possible
* SE GA: 5-9"

☔️ Widespread flooding rainfall anticipated east of FL HWY 301.

Moderate to major river flooding expected.

🌀𝐓𝐫𝐨𝐩𝐢𝐜𝐚𝐥 𝐒𝐭𝐨𝐫𝐦 𝐖𝐚𝐭𝐜𝐡𝐞𝐬 & 𝐖𝐚𝐫𝐧𝐢𝐧𝐠𝐬 in Effect for Atlantic coast & portions of inland NE FL & SE GA

🌬️ Strong TS winds with gusts up to hurricane strength possible.

Downed trees 💨🌳🌴 , power outages🔦, home damage🏘, & impassable roads🛣 possible.

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NWS Jacksonville

@NWSJacksonville

Take advantage of the good weather today to finish up your hurricane preparations.

Major Hurricane Ian Potential Local Impacts:
☔️ Widespread flooding rainfall
🌬️ TS winds/Hurricane gusts
🌊 Moderate Storm Surge
🌪️ Tornadoes

weather.gov/srh/tropical?o…

#flwx #gawx #jaxwx

🌀𝐒𝐭𝐨𝐫𝐦 𝐒𝐮𝐫𝐠𝐞 𝐖𝐚𝐭𝐜𝐡𝐞𝐬 𝐚𝐧𝐝 𝐖𝐚𝐫𝐧𝐢𝐧𝐠𝐬 are in effect along the NE FL and SE GA coast, ICWW, and St. Johns River Basin.

🌊 Storm surge is often the greatest threat to life and property from a hurricane.

Moderate storm surge of 3-6 ft possible.

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NWS Atlanta

@NWSAtlanta

🧵WEEKEND WEATHER: We've got some big changes coming up for the weekend, so get ready! We'll start with a severe weather threat Friday night followed by windy and much colder conditions Saturday and very cold temperatures Saturday night into Sunday morning. #gawx

⚡️Severe Storms Possible Friday Night⚡️ The risk for severe thunderstorms increases Friday night into pre-dawn Saturday along and south of the I-85 corridor ahead of the incoming strong cold front. The highest risk will be in Central Georgia. #gawx

🥶🥶Much colder air will arrive behind the front on Saturday, with temperatures remaining in the 30s and 40s for many of us. High temperatures will occur in the morning with temperatures dropping or steady through the day. Very gusty winds will keep wind chills even colder. #gawx

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NWS Atlanta

@NWSAtlanta

With KJGX radar going down for refurbishment, radar is on our mind! So lets talk about something we get asked about a lot; what is this hole in the radar over the radar location? To answer, we need to learn a little bit about how radar works, and use some *gasp* math! (1/7) #gawx

Radar sends out electromagnetic waves in order to detect objects. At the most basic level, waves are generated by the dish, the waves travel out, hit objects and scatter, and then some amount returns back to the radar, which we can measure. (2/7)

You can think of this as the radar "shouting" and then "listening" for a return echo. So the radar has to do two things before listening - first shout (send out the waves), then switch modes to "listen" for the return. Our radar does this very fast - like, microseconds fast (3/7)