United States: Tropical Storm IRMA 11/2100Z Update from NHC and others – Updated 11 Sep 2017 2145z (GMT/UTC)

TROPICAL STORM IRMA

IRMA CONTINUES TO SLOWLY WEAKEN WHILE MOVING OVER SOUTHWESTERN GEORGIA – NHC

⚠️

A Storm Surge Warning is in effect for…
* North of Fernandina Beach to the South Santee River
* North of Clearwater Beach to the Aucilla River

A Tropical Storm Warning is in effect for…
* North of Altamaha Sound to the South Santee River

(Please check comments at bottom of page for updates)

National Hurricane Center (FL)

SPECIAL EMERGENCY MESSAGE FROM NWS

152552_5day_cone_with_line_and_wind TS IRMA Adv 51

 

152552_earliest_reasonable_toa_34 51

activity_looprb_lalo-animated2

southeast_loop

Robins Air Force Base, GA Radar

Wind Probs  

(Please check comments at bottom of page for updates)

ZCZC MIATCPAT1 ALL
TTAA00 KNHC DDHHMM

BULLETIN
Tropical Storm Irma Advisory Number 51
NWS National Hurricane Center Miami FL AL112017
500 PM EDT Mon Sep 11 2017

…IRMA CONTINUES TO SLOWLY WEAKEN WHILE MOVING OVER SOUTHWESTERN
GEORGIA…

 

SUMMARY OF 500 PM EDT…2100 UTC…INFORMATION
———————————————-
LOCATION…31.5N 84.0W
ABOUT 10 MI…15 KM E OF ALBANY GEORGIA
ABOUT 150 MI…240 KM S OF ATLANTA GEORGIA
MAXIMUM SUSTAINED WINDS…50 MPH…85 KM/H
PRESENT MOVEMENT…NNW OR 340 DEGREES AT 17 MPH…28 KM/H
MINIMUM CENTRAL PRESSURE…985 MB…29.09 INCHES

 

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:

The Storm Surge Warnings from Fernandina Beach southward, from
the Aucilla River westward, and from Clearwater Beach southward,
including Tampa Bay, have been discontinued.

The Tropical Storm Warning from the Flagler/Volusia County line to
Altamaha Sound is discontinued.

The Tropical Storm Warning from north of the Suwannee River to the
Okaloosa/Walton County line is discontinued.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for…
* North of Fernandina Beach to the South Santee River
* North of Clearwater Beach to the Aucilla River

A Tropical Storm Warning is in effect for…
* North of Altamaha Sound to the South Santee River

A Storm Surge Warning means there is a danger of life-threatening
inundation, from rising water moving inland from the coastline,
during the next 36 hours in the indicated locations. For a
depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
hurricanes.gov. This is a life-threatening situation. Persons
located within these areas should take all necessary actions to
protect life and property from rising water and the potential for
other dangerous conditions. Promptly follow evacuation and other
instructions from local officials.

Interests elsewhere in the southeastern United States should monitor
the progress of Irma.

For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.

 

DISCUSSION AND 48-HOUR OUTLOOK
——————————
At 500 PM EDT (2100 UTC), the center of Tropical Storm Irma was
located near latitude 31.5 North, longitude 84.0 West. Irma is
moving toward the north-northwest near 17 mph (28 km/h), and a
turn toward the northwest is expected by Tuesday morning. On the
forecast track, the center of Irma will continue to move over
southwestern Georgia tonight and move into Alabama on Tuesday.

Maximum sustained winds have decreased to near 50 mph (85 km/h) with
higher gusts. Continued weakening is forecast, and Irma is likely
to become a tropical depression on Tuesday.

Tropical-storm-force winds extend outward up to 415 miles (665 km)
from the center.

The estimated minimum central pressure is 985 mb (29.09 inches).

 

HAZARDS AFFECTING LAND
———————-
STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline. The water is
expected to reach the following HEIGHTS ABOVE GROUND if the peak
surge occurs at the time of high tide…

North of Clearwater Beach to Aucilla River…4 t 6 ft
West of Aucilla River to Ochlockonee River…1 to 3 ft
Clearwater Beach to Bonita Beach including Tampa Bay…1 to 3 ft

South Santee River to North of Fernandina Beach…4 to 6 ft
Fernandina Beach to Flagler/Volusia County line, including the St.
Johns River…1 to 3 ft

The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
destructive waves. Surge-related flooding depends on the relative
timing of the surge and the tidal cycle, and can vary greatly over
short distances. For information specific to your area, please see
products issued by your local National Weather Service forecast
office.

WIND: Tropical storm conditions are expected in portions of the
warning area into tonight.

Rainfall: Irma is expected to produce the following rain
accumulations through Wednesday:

South Carolina and north-central Georgia and Alabama into the
southern Appalachians…3 to 6 inches with isolated 10 inches.
Northern Mississippi and southern portions of Tennessee and North
Carolina…2 to 4 inches.

TORNADOES: Isolated tornadoes are possible tonight along the South
Carolina coast.

SURF: Swells generated by Irma are affecting the southeast coast of
the United States. These swells are likely to cause life-
threatening surf and rip current conditions. Please consult
products from your local weather office.

 

NEXT ADVISORY
————-
Next intermediate advisory at 800 PM EDT.
Next complete advisory at 1100 PM EDT.

$$
Forecaster Pasch

NNNN

LOCAL STATEMENTS

Issuing WFO Homepage Local Impacts Local Statement
Miami, FL Threats and Impacts 1125 AM EDT Mon Sep 11
Charleston, SC Not currently available 1139 AM EDT Mon Sep 11
Tallahassee, FL Threats and Impacts 1141 AM EDT Mon Sep 11 2017 /1041 AM CDT Mon Sep 11
Atlanta, GA Threats and Impacts 1147 AM EDT Mon Sep 11
Birmingham, AL Threats and Impacts 1124 AM CDT Mon Sep 11
Melbourne, FL Threats and Impacts 233 PM EDT Mon Sep 11
Tampa Bay Area, FL Threats and Impacts 456 PM EDT Mon Sep 11
Jacksonville, FL Threats and Impacts 515 PM EDT Mon Sep 11

============================================================================

TROPICAL STORM RISK (TSR)

N Atlantic: Storm Alert issued at 11 Sep, 2017 21:00 GMT

Tropical Storm IRMA is currently located near 31.5 N 84.0 W with maximum 1-min sustained winds of 45kts (52 mph). IRMA is forecast to affect land to the following likelihood(s) at the given lead time(s):

Yellow Alert Country(s) or Province(s)
    the United States
        probability for TS is 100% currently
Yellow Alert City(s) and Town(s)
    Charlotte (35.2 N, 80.8 W)
        probability for TS is 100% currently
    Columbia (34.0 N, 81.0 W)
        probability for TS is 100% currently
    Atlanta (33.8 N, 84.4 W)
        probability for TS is 100% currently
    Myrtle Beach (33.7 N, 79.1 W)
        probability for TS is 100% currently
    Charleston (32.9 N, 80.0 W)
        probability for TS is 100% currently
    Montgomery (32.4 N, 86.3 W)
        probability for TS is 100% currently
    Savannah (32.0 N, 81.0 W)
        probability for TS is 100% currently
    Tallahassee (30.4 N, 84.3 W)
        probability for TS is 100% currently
    Jacksonville (30.3 N, 81.7 W)
        probability for TS is 100% currently
    Orlando (29.0 N, 81.5 W)
        probability for TS is 90% currently
    Tampa (28.0 N, 82.5 W)
        probability for TS is 70% currently
    Nashville (36.1 N, 86.8 W)
        probability for TS is 60% in about 21 hours

Green Alert City(s) and Town(s)
    Pensacola (30.7 N, 87.0 W)
        probability for TS is 40% within 9 hours
    Louisville (38.4 N, 86.0 W)
        probability for TS is 35% in about 21 hours

Note that
Yellow Alert (Elevated) is CAT 1 or above to between 10% and 30% probability, or TS to above 50% probability.
Green Alert (Low) is TS to between 31% and 50% probability.
CAT 1 means Hurricane strength winds of at least 74 mph, 119 km/h or 64 knots 1-min sustained.
TS means Tropical Storm strength winds of at least 39 mph, 63 km/h or 34 knots 1-min sustained.

For graphical forecast information and further details please visit http://www.tropicalstormrisk.com/

 

201711N tsr1 irma 11

201711N_0 tsr2 irma 11

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Other

 

at201711_5day ts irma

at201711_sat ts irma

 

The two images above are from @wunderground

Ferocious Irma Pounding Florida, But It Could Have Been Worse

No Rest for the Hurricane-Weary: Jose a Potential East Coast Threat

windy.com – interactive animated wind map

Caribbean_general_map

Caribbean General Map (Image: Kmusser)

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MARITIME/SHIPPING

METAREA4 / HURRICANE_ADVISORY / 112035

WTNT21 KNHC 112035
TCMAT1

TROPICAL STORM IRMA FORECAST/ADVISORY NUMBER 51
NWS NATIONAL HURRICANE CENTER MIAMI FL AL112017
2100 UTC MON SEP 11 2017

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY…

THE STORM SURGE WARNINGS FROM FERNANDINA BEACH SOUTHWARD… FROM
THE AUCILLA RIVER WESTWARD… AND FROM CLEARWATER BEACH
SOUTHWARD… INCLUDING TAMPA BAY… HAVE BEEN DISCONTINUED.

THE TROPICAL STORM WARNING FROM THE FLAGLER/VOLUSIA COUNTY LINE TO
ALTAMAHA SOUND IS DISCONTINUED.

THE TROPICAL STORM WARNING FROM NORTH OF THE SUWANNEE RIVER TO THE
OKALOOSA/WALTON COUNTY LINE IS DISCONTINUED.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT…

A STORM SURGE WARNING IS IN EFFECT FOR…
* NORTH OF FERNANDINA BEACH TO THE SOUTH SANTEE RIVER
* NORTH OF CLEARWATER BEACH TO THE AUCILLA RIVER

A TROPICAL STORM WARNING IS IN EFFECT FOR…
* NORTH OF ALTAMAHA SOUND TO THE SOUTH SANTEE RIVER

A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING
INUNDATION… FROM RISING WATER MOVING INLAND FROM THE COASTLINE…
DURING THE NEXT 36 HOURS IN THE INDICATED LOCATIONS. FOR A
DEPICTION OF AREAS AT RISK… PLEASE SEE THE NATIONAL WEATHER
SERVICE STORM SURGE WATCH/WARNING GRAPHIC… AVAILABLE AT
HURRICANES.GOV. THIS IS A LIFE-THREATENING SITUATION. PERSONS
LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO
PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR
OTHER DANGEROUS CONDITIONS. PROMPTLY FOLLOW EVACUATION AND OTHER
INSTRUCTIONS FROM LOCAL OFFICIALS.

INTERESTS ELSEWHERE IN THE SOUTHEASTERN UNITED STATES SHOULD MONITOR
THE PROGRESS OF IRMA.

TROPICAL STORM CENTER LOCATED NEAR 31.5N 84.0W AT 11/2100Z
POSITION ACCURATE WITHIN 20 NM

PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 15 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 985 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT…….360NE 230SE 150SW 240NW.
12 FT SEAS..600NE 390SE 390SW 0NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT…CENTER LOCATED NEAR 31.5N 84.0W AT 11/2100Z
AT 11/1800Z CENTER WAS LOCATED NEAR 30.9N 83.5W

FORECAST VALID 12/0600Z 33.1N 85.5W…INLAND
MAX WIND 35 KT…GUSTS 45 KT.
34 KT…220NE 120SE 100SW 100NW.

FORECAST VALID 12/1800Z 34.5N 87.3W…INLAND
MAX WIND 30 KT…GUSTS 40 KT.

FORECAST VALID 13/0600Z 35.8N 88.8W…POST-TROP/INLAND
MAX WIND 25 KT…GUSTS 35 KT.

FORECAST VALID 13/1800Z 37.0N 88.5W…POST-TROP/INLAND
MAX WIND 20 KT…GUSTS 30 KT.

FORECAST VALID 14/1800Z…DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 31.5N 84.0W

NEXT ADVISORY AT 12/0300Z

$$
FORECASTER PASCH

=============================================================================

000
FZNT25 KNHC 112138
OFFN04

NAVTEX Marine Forecast
NWS National Hurricane Center Miami, FL
538 PM EDT Mon Sep 11 2017

…Please refer to Coastal Waters Forecasts (CWF) available
through NOAA Weather Radio and other means for detailed
Coastal Waters Forecasts…

Southeast Gulf of Mexico

.SYNOPSIS…Tropical Storm Irma near 31.5N 84.0W, 985 mb moving
NNW at 15 kt at 5 PM EDT, and inland over SW Georgia. Maximum
sustained winds 45 kt gusts 55 kt. Irma will continue moving NNW
and and weaken to a depression as it move farther N. A weak
pressure pattern will set up across the Gulf in the wake of Irma
through the remainder of the week. N to NE swell from Irma will
dominate seas across the Gulf through Tue.

.TONIGHT…W to NW winds 20 to 25 kt, diminishing to 10 to 15 kt
late in the night. Seas 7 to 10 ft in NW to N swell. Slight
chance of showers.
.TUE…SW to W winds 10 to 15 kt. Seas 5 to 7 ft,subsiding to
3 to 5 ft late in the afternoon.
.TUE NIGHT…S to SW winds 5 to 10 kt. Seas 3 to 5 ft.
.WED…S to SW winds 5 to 10 kt. Seas 3 ft early in the morning,
subsiding to 2 ft or less. Isolated thunderstorms.
.WED NIGHT…SE to S winds 5 to 10 kt. Seas 2 ft or less.
.THU…S to SW winds 5 to 10 kt. Seas 2 ft or less.
.THU NIGHT…S winds 5 to 10 kt, shifting to E after midnight.
Seas 2 ft or less.
.FRI…E winds 5 to 10 kt. Seas 2 ft or less.
.FRI NIGHT…NE winds 5 to 10 kt. Seas 2 ft or less.
.SAT…NE winds 5 to 10 kt. Seas 2 ft or less.
.SAT NIGHT…N to NE winds 10 to 15 kt. Seas 2 ft or less.

Within 200 nm east of the coast of Florida

.SYNOPSIS…Tropical Storm Irma near 31.5N 84.0W, 985 mb moving
NNW at 15 kt at 5 PM EDT, and inland over SW Georgia. Farther E,
Hurricane Jose is near 26.4N 69.2W, 973 mb moving N at 10 kt.
Maximum sustained winds 85 kt gusts to 105 kt. Jose is expected
to move to 27.2N 69.0W tonight, to 27.0N 67.7W Tue afternoon, to
26.3N 66.7W Tue night, to 25.3N 66.1W Wed afternoon, to 24.4N
68.6W Thu afternoon, before moving slowly NW thereafter as its
completes this clockwise loop. Swell from Jose will dominate
area waters Tue through Fri.

…TROPICAL STORM WARNING…

.TONIGHT…SW to W winds 15 to 20 kt S of 27N, and SW 20 to 25 kt
N of 27N. Seas 7 to 10 ft in NE to E swell. Scattered showers and
isolated thunderstorms.
.TUE…W winds 5 to 10 kt S of 27N, and SW to W 15 to 20 kt N of
27N. Seas 6 to 8 ft in NE to E swell. Scattered showers and
isolated thunderstorms.
.TUE NIGHT…SW winds less than 5 kt S of 27N, and SW to W 10 to
15 kt N of 27N. Seas 4 to 6 ft. Scattered showers and isolated
thunderstorms.
.WED…S of 27N,SW to W winds less than 5 kt, shifting to N late
in the afternoon. N of 27N,SW winds 5 to 10 kt, shifting to E to
SE in the afternoon. Seas 3 to 5 ft. Slight chance of showers and
isolated thunderstorms.
.WED NIGHT…E to SE winds 5 to 10 kt. Seas 3 to 5 ft.
.THU…NE to E winds less than 5 kt. Seas 3 to 4 ft in NE swell.
.THU NIGHT…NE to E winds 5 to 10 kt. Seas 3 to 5 ft.
.FRI…NE winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT…N to NE winds 15 to 20 kt. Seas 6 to 9 ft.
.SAT…N winds 20 to 25 kt. Seas 8 to 11 ft in NE swell.
.SAT NIGHT…NW winds 20 to 25 kt. Seas 8 to 11 ft in NE swell.

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