HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase...

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HURRICANE IRMA www.weather.gov/atlanta Georgia Threats & Impacts Updated: 11 AM / Sunday, Sept. 10 @NWSAtlanta

Transcript of HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase...

Page 1: HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase in rain bands along and east of the track Fast moving, short-lived, rain-wrapped

HURRICANE IRMA

www.weather.gov/atlanta

Georgia Threats & ImpactsUpdated: 11 AM / Sunday, Sept. 10

@NWSAtlanta

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Situation Overview

11:00 AM EDT Sun Sep 10Location: 25.0°N 81.5°WMoving: N at 9 mphMin pressure: 933 mbMax sustained: 130 mph**Cat 4 – Major Hurricane

Little to no change for Georgia

Hurricane-force winds extend 80 miles out from the center of Irma

Tropical storm-force winds extend 220 miles out for the center of Irma

LOCATION...22.1N 76.5W ABOUT 195 MI...310 KM E OF CAIBARIEN CUBA ABOUT 345 MI...555 KM SE OF MIAMI FLORIDA MAXIMUM SUSTAINED WINDS...155 MPH...250 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...925 MB...27.32 INCHES

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Summary of Hazards – Georgia

• Coastal Storm surge + inland flooding (through Monday PM):

• 3-6 feet (above normally dry ground) w/ isold. 8-ft surge (depending on

tide levels)

• Damaging Winds:

• After midnight tonight -- Tropical storm force winds (40-74 mph) arriving

across south Georgia

• Stronger wind gusts of 75-90 MPH possible over extreme SW GA

(Bainbridge, Moultrie, Valdosta) between 10am-3pm Monday

• Tropical storm force winds expected across higher elevations of north

Georgia late Monday/Monday night

• Heavy Rain / Flash Flooding

• Widespread 3-6 inches with areas of 6-10 inches, mainly across SE

Georgia

• Isolated higher amounts of 10-15” expected (mainly SE GA)

• Tornadoes (short-lived)

• Mainly areas east of the storm track in outer rain bands

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Storm Surge Warning

Storm Surge Warning for all of

GA Coast

3-6 foot surge with isolated

locations to 8 feet

Values dependent on high/low

tide levels

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Time of Arrival – earliest chance

• From NHC 11am

Sunday Advisory

Page 6: HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase in rain bands along and east of the track Fast moving, short-lived, rain-wrapped

9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Time of Arrival – most likely

• From NHC 11am

Sunday Advisory

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Maximum Wind Gusts

Sunday Night:

• Peak wind gusts

• These are not

sustained winds

• Higher gusts likely within

rain bands

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Maximum Wind Gusts

Monday (8am-8pm)

• Peak wind gusts

• These are not

sustained winds

• Higher gusts likely

within rain bands

Page 9: HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase in rain bands along and east of the track Fast moving, short-lived, rain-wrapped

9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Maximum Wind Gusts (Tuesday)

Monday night (mainly

before midnight)

• Peak wind gusts

• These are not

sustained winds

• Highest gusts likely

within rain bands

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Maximum Wind Gusts (Tuesday)

Tuesday (morning)

• Peak wind gusts

• These are not

sustained winds

• Highest gusts likely

within rain bands

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Radar Forecast – late Mon AM

Impacts from outer rain

bands associated with

Irma:

• Torrential rainfall: 1-2”

per hour rain rates

• Flash Flooding

(localized)

• Higher wind gusts (far

from center of Irma)

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Radar Forecast – mid PM Mon

Impacts from outer rain

bands associated with

Irma:

• Torrential rainfall: 1-2”

per hour rain rates

• Flash Flooding

(localized)

• Higher wind gusts (far

from center of Irma)

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Radar Forecast – Monday Evening

Impacts from outer rain

bands associated with

Irma:

• Torrential rainfall: 1-2”

per hour rain rates

• Flash Flooding

(localized)

• Higher wind gusts (far

from center of Irma)

Page 14: HURRICANE IRMA - FLETC IMPACTS...Hurricane Irma WEATHER FORECAST OFFICE Risk for tornadoes increase in rain bands along and east of the track Fast moving, short-lived, rain-wrapped

9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Radar Forecast – Tuesday Morning

Impacts from outer rain

bands associated with

Irma:

• Torrential rainfall: 1-2”

per hour rain rates

• Flash Flooding

(localized)

• Higher wind gusts (far

from center of Irma)

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Expected Storm Total Rainfall

4-6”

6-10”

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Risk for tornadoes increase in rain bands along and east of the track

Fast moving, short-lived, rain-wrapped

Tornadoes would be coming from East or Southeast (typically from west or southwest)

Tornado Risk - Monday

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9/10/2017 11:28 AM www.weather.gov/atlanta

ATLANTAWEATHER FORECAST OFFICE

Hurricane Irma

Starting later today, the River

Forecast Center will include

72 hours of possible Rainfall

in the river forecasts.

You may start to see locations

going into flood as a result

NOTE: These will be

contingent upon the accuracy

of the forecast rainfall.

We will not be issuing flood

warnings based on this, but will

mention in any flood watch

issued.

Potential for River Flooding

http://water.weather.gov/ahps2/index.php?wfo=FFC


What Have We Learned From Hurricane Irma? - SEPGA

What Have We Learned From Hurricane Irma? - SEPGA

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