(= CATEGORY 1 Hurricane on the Saffir-Simpson Hurricane Wind Scale)
……..GERT RACING TOWARD THE NORTHEAST…
…EXPECTED TO BECOME POST-TROPICAL LATER TODAY……NHC FL
⚠️ Life-threatening surf and
rip currents will continue to affect the NE coastof US and Atlantic Canada through
National Hurricane Center (FL)
WTNT33 KNHC 171433
Hurricane Gert Advisory Number 19
NWS National Hurricane Center Miami FL AL082017
1100 AM AST Thu Aug 17 2017
…GERT RACING TOWARD THE NORTHEAST…
…EXPECTED TO BECOME POST-TROPICAL LATER TODAY…
SUMMARY OF 1100 AM AST…1500 UTC…INFORMATION
ABOUT 685 MI…1100 KM E OF HALIFAX NOVA SCOTIA
ABOUT 285 MI…460 KM SSE OF CAPE RACE NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS…80 MPH…130 KM/H
PRESENT MOVEMENT…ENE OR 60 DEGREES AT 40 MPH…65 KM/H
MINIMUM CENTRAL PRESSURE…975 MB…28.80 INCHES
WATCHES AND WARNINGS
There are no coastal watches or warnings in effect.
DISCUSSION AND 48-HOUR OUTLOOK
At 1100 AM AST (1500 UTC), the center of Hurricane Gert was located
near latitude 43.2 North, longitude 50.0 West. Gert is moving toward
the east-northeast near 40 mph (65 km/h), and this general motion is
expected to continue for the next day or so.
Maximum sustained winds have decreased to near 80 mph (130 km/h)
with higher gusts. Additional weakening is forecast during the next
48 hours. Gert is forecast to become a post-tropical cyclone later
Hurricane-force winds extend outward up to 35 miles (55 km) from the
center and tropical-storm-force winds extend outward up to 175 miles
The estimated minimum central pressure is 975 mb (28.80 inches).
HAZARDS AFFECTING LAND
SURF: Swells generated by Gert will continue to affect the coast
of the northeastern United States and Atlantic Canada through
tonight. These swells are likely to cause life-threatening surf and
rip current conditions. Please consult products from your local
weather forecast office.
Next complete advisory at 500 PM AST.
Tropical Cyclone Information Statements
8:55 AM ADT Thursday 17 August 2017
Tropical cyclone information statement for:
Newfoundland and Labrador:
For Hurricane Gert.
The next information statement will be issued by 3:30 p.m. NDT.
Hurricane Gert will race across the Southern Grand Banks today with no direct impacts to Canadian land areas. Hurricane force winds are not expected over the Grand Banks.
1. Summary of basic information at 09:30 a.m. NDT.
Location: Near 42.3 North 51.7 West.
About 497 kilometres south-southeast of Cape Race.
Maximum sustained winds: 148 kilometres per hour.
Present movement: East-northeast at 76 kilometres per hour.
Minimum central pressure: 972 millibars.
2. Public weather impacts and warnings summary.
A special weather statement highlights the possibility of abnormal variations in the tides.
Any significant winds from Gert are expected to remain well offshore.
Some moisture from Gert will feed into an approaching non-tropical weather system near eastern Newfoundland. This system will reach Newfoundland on Thursday and amounts of 25 to 50 mm are forecast over portions of eastern and northern Newfoundland.
Long period swells from Gert will reach 2 to 4 metres along south-facing coastlines of Newfoundland later today, with the highest waves likely along the southern Avalon peninsula. These swells could also lead to dangerous rip currents. Significant wave heights of 3 to 5 metres are expected over the Grand Banks on this afternoon. The highest waves from Gert will remain south of Canadian waters.
In addition, Hurricane Gert may cause a series of rapid changes in water levels in harbours and inlets from the Avalon Peninsula north to Trinity Bay for a couple of hours. The most likely time ranges from late this afternoon into this evening. High tide will be occurring late this afternoon for most areas, so there is a risk for minor flooding near and after high tide.
3. Marine weather impacts and warnings summary.
The latest track for Gert has it passing over the extreme southern Grand Banks today and transitioning to a very intense mid-latitude storm as it passes east of our forecast waters. Gale to storm force winds are expected over southernmost portions of the Grand Banks, with hurricane force winds remaining just south of the Grand Banks. Gale and Storm warnings are in effect for the southern Grand Banks.
Please continue to monitor alerts issued by the Canadian Hurricane Centre and forecasts issued by Environment Canada.
For more comprehensive information about track tables and forecast rationale, please see the Technical Discussion
Visit the Canadian Hurricane Centre to learn more about hurricanes.
TROPICAL STORM RISK (TSR)
METAREA4 / HURRICANE_ADVISORY / 150831
WTNT23 KNHC 171433
HURRICANE GERT FORECAST/ADVISORY NUMBER 19
NWS NATIONAL HURRICANE CENTER MIAMI FL AL082017
1500 UTC THU AUG 17 2017
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
HURRICANE CENTER LOCATED NEAR 43.2N 50.0W AT 17/1500Z
POSITION ACCURATE WITHIN 25 NM
PRESENT MOVEMENT TOWARD THE EAST-NORTHEAST OR 60 DEGREES AT 35 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 975 MB
MAX SUSTAINED WINDS 70 KT WITH GUSTS TO 85 KT.
64 KT……. 0NE 30SE 20SW 0NW.
50 KT……. 0NE 70SE 40SW 0NW.
34 KT……. 90NE 150SE 120SW 50NW.
12 FT SEAS..120NE 300SE 420SW 270NW.
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 43.2N 50.0W AT 17/1500Z
AT 17/1200Z CENTER WAS LOCATED NEAR 42.2N 52.0W
FORECAST VALID 18/0000Z 46.0N 43.6W…POST-TROP/EXTRATROP
MAX WIND 55 KT…GUSTS 65 KT.
50 KT… 0NE 70SE 40SW 0NW.
34 KT…120NE 150SE 120SW 50NW.
FORECAST VALID 18/1200Z 49.3N 37.4W…POST-TROP/EXTRATROP
MAX WIND 45 KT…GUSTS 55 KT.
34 KT…150NE 150SE 120SW 70NW.
FORECAST VALID 19/0000Z 51.3N 35.0W…POST-TROP/EXTRATROP
MAX WIND 40 KT…GUSTS 50 KT.
34 KT…180NE 180SE 60SW 120NW.
FORECAST VALID 19/1200Z 52.4N 34.3W…POST-TROP/EXTRATROP
MAX WIND 35 KT…GUSTS 45 KT.
34 KT…180NE 180SE 60SW 180NW.
FORECAST VALID 20/1200Z…DISSIPATED
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 43.2N 50.0W
NEXT ADVISORY AT 17/2100Z
AXNT20 KNHC 150926
Tropical Weather Discussion
NWS National Hurricane Center Miami FL
526 AM EDT Tue Aug 15 2017
Tropical Weather Discussion for North America, Central America
Gulf of Mexico, Caribbean Sea, northern sections of South
America, and Atlantic Ocean to the African coast from the
Equator to 32N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.
Based on 0600 UTC surface analysis and satellite imagery through
Hurricane Gert is centered near 31.8N 72.5W at 15/0900 UTC or
about 375 nm W of Bermuda moving N at 11 kt. Estimated minimum
central pressure is 986 mb. Maximum sustained wind speed is 65 kt
with gusts to 80 kt. Numerous moderate to strong convection is
from 30N-32N between 70W-73W. Scattered moderate convection is
elsewhere from 28N-33N between 70W-74W. See latest NHC
forecast/advisory under AWIPS/WMO headers MIATCMAT3/WTNT23 KNHC
for more details.
A tropical wave is W of the Cape Verde islands associated with a
1012 mb low pressure located near 14N28W. The wave axis extends
from 18N27W to the low to 09N28W and has been moving W at 10 kt.
The wave is in a region of low vertical wind shear, however
intrusion of Saharan dry air and dust to the wave environment
limit deep convection. Shallow moisture confined to the vicinity
of the monsoon trough and upper level diffluent wind support
scattered moderate convection SW of the low center from 10N-14N
between 28W-33W. Slow development of this system is anticipated
during the next day or two, but conditions are forecast to become
a little more conducive for tropical cyclone formation by later in
the week while the system moves westward over the tropical
A tropical wave is in the central Atlc with axis extending from
20N51W to 09N53W, moving W at 25 kt. The wave is entering a
region of moderate to strong vertical wind shear and is being
severely affected by extensive Saharan dry air and dust, which is
hindering convection at the time.
A tropical wave is in the E Caribbean with axis extending from
20N64W to 10N66W, moving W at 25 kt. The wave is in a region of
strong vertical wind shear and dry air subsidence, which is
hindering deep convection at the time. Shallow moisture observed
in CIRA LPW imagery and upper level diffluent flow ahead of the
wave axis in the N-central Caribbean support isolated showers over
northern Puerto Rico and adjacent waters as well as the Mona
Passage and E Dominican Republic.
The monsoon trough extends from the coast of W Africa near 12N16W
to 14N28W to 11N42W. The Intertropical Convergence Zone axis
extends from 11N43W to the coast of Venezuela near 09N60W.
Numerous heavy showers and scattered tstms are coming off the W
African coast associated with the next tropical wave. The
convection extends from 05N to 11N E of 18W. Scattered moderate
convection is from 06N to 15N between 34W and 46W associated with
a 1012 mb low located near 11N39W.
GULF OF MEXICO…
Weak surface ridging prevails across the basin, which along with
dry air subsidence support mainly fair weather conditions.
A broad upper level low is centered just N of the Yucatan
Peninsula, which supports isolated showers there and in the
Yucatan Channel. Diffluent flow in the NW periphery of the low
support similar shower activity off the SE coast of Louisiana and
Mississippi. Winds are gentle to moderate and from the S-SE in the
western half of the basin and light variable elsewhere. The ridge
will remain in place across the Gulf waters the next couple of
days. A surface trough will develop each evening across the
Yucatan Peninsula shifting W to the Bay of Campeche during the
overnight hours. Locally higher winds can be expected west of the
A tropical wave is moving through the eastern Caribbean. Please
see section above. The tropical wave will continue to propagate
westward over Puerto Rico this morning, then will move over
central Caribbean waters tonight. Isolated showers are occurring
ahead of the wave axis over northern Puerto Rico and adjacent
waters, the Mona Passage and E Dominican Republic. This convection
is mainly due to shallow moisture and a diffluent wind environment
aloft associated with an upper level low over central Atlc waters.
A broad upper level low centered just N of the Yucatan Peninsula
support isolated showers in the Yucatan Channel extending to NW
Caribbean waters N of 17N W of 80W. Scattered heavy showers and
tstms are over Belize and northern Guatemala associated with the
passage of a tropical wave with axis currently moving across the
Gulf of Tehuantepec, Mexico. Otherwise, fresh to near gale force
winds are in the south-central basin forecast to continue through
An upper level low over the central Atlc will drift WSW to the north
and across the Island over the next couple of days. This low aloft
along with the passage of a tropical wave will support scattered
to isolated showers over the Island and adjacent waters through
Scattered showers and tstms are N of 28N between 70W and 74W associated
with the rainbands of Hurricane Gert centered north of the area.
See Special features for further details. Otherwise, the
remainder basin generally N of 20N is under the influence of the
Azores high, which supports fair weather. For information about
tropical waves, see section above.
For additional information please visit
Do not use any information on this site for life or death decisions. All information is intended as supplementary to official sources. Kindly refer to your country’s official weather agency/government website for local warnings, advisories and bulletins.