WTNT32 KNHC 052054
TCPAT2

BULLETIN
HURRICANE LESLIE ADVISORY NUMBER 26
NWS NATIONAL HURRICANE CENTER MIAMI FL AL122012
500 PM AST WED SEP 05 2012

...HURRICANE LESLIE DRIFTING ERRATICALLY NORTHWARD...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...25.9N 62.7W
ABOUT 460 MI...740 KM SSE OF BERMUDA
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...N OR 360 DEGREES AT 2 MPH...4 KM/H
MINIMUM CENTRAL PRESSURE...987 MB...29.15 INCHES

000
WTNT32 KNHC 070233
TCPAT2

BULLETIN
HURRICANE LESLIE ADVISORY NUMBER 31
NWS NATIONAL HURRICANE CENTER MIAMI FL AL122012
1100 PM AST THU SEP 06 2012

...LESLIE REMAINS NEARLY STATIONARY...
...SLOW NORTHWARD MOVEMENT EXPECTED ON FRIDAY...


SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...26.5N 62.2W
ABOUT 430 MI...690 KM SSE OF BERMUDA
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...STATIONARY
MINIMUM CENTRAL PRESSURE...985 MB...29.09 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WATCH IS IN EFFECT FOR...
* BERMUDA

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN THE NEXT 2 TO 3
DAYS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR
PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 1100 PM AST...0300 UTC...THE CENTER OF HURRICANE LESLIE WAS
LOCATED NEAR LATITUDE 26.5 NORTH...LONGITUDE 62.2 WEST. LESLIE IS
STATIONARY...AND LITTLE MOTION IS EXPECTED TONIGHT. A NORTHWARD
DRIFT IS EXPECTED ON FRIDAY...WITH A SLIGHTLY FASTER NORTHWARD
MOTION EXPECTED FRIDAY NIGHT AND SATURDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 75 MPH...120 KM/H...WITH HIGHER
GUSTS. LESLIE IS A CATEGORY ONE HURRICANE ON THE SAFFIR-SIMPSON
HURRICANE WIND SCALE. LITTLE CHANGE IN STRENGTH IS EXPECTED TONIGHT
AND FRIDAY...WHILE SLOW STRENGTHENING IS POSSIBLE FRIDAY NIGHT AND
SATURDAY.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 35 MILES...55 KM...FROM
THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 160
MILES...260 KM. NOAA BUOY 41049 RECENTLY REPORTED 1-MINUTE MEAN
WINDS OF 54 MPH...86 KM/HR...AND A WIND GUST OF 65 MPH...104 KM/HR.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 985 MB...29.09 INCHES. A NOAA
HURRICANE HUNTER AIRCRAFT IS SCHEDULED TO INVESTIGATE LESLIE ON
FRIDAY MORNING.


HAZARDS AFFECTING LAND
----------------------
SURF...SWELLS GENERATED BY LESLIE WILL CONTINUE TO AFFECT BERMUDA...
THE U.S. EAST COAST FROM CENTRAL FLORIDA NORTHWARD...THE NORTHERN
LEEWARD ISLANDS...PUERTO RICO...AND THE VIRGIN ISLANDS FOR THE NEXT
SEVERAL DAYS. THESE SWELLS COULD CAUSE LIFE-THREATENING SURF AND
RIP CURRENT CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL
WEATHER OFFICE FOR MORE INFORMATION.

RELEASE : 12-310 NASA'S Global Hawk Mission Begins With Flight to Hurricane Leslie WASHINGTON -- NASA has begun its latest hurricane science field campaign by flying an unmanned Global Hawk aircraft over Hurricane Leslie in the Atlantic Ocean during a day-long flight from California to Virginia. With the Hurricane and Severe Storm Sentinel (HS3) mission, NASA for the first time will be flying Global Hawks from the U.S. East Coast.

The Global Hawk took off from NASA's Dryden Flight Research Center at Edwards Air Force Base, Calif., Thursday and landed at the agency's Wallops Flight Facility on Wallops Island, Va., today at 11:37 a.m. EDT after spending 10 hours collecting data on Hurricane Leslie. The month-long HS3 mission will help researchers and forecasters uncover information about how hurricanes and tropical storms form and intensify.

NASA will fly two Global Hawks from Wallops during the HS3 mission. The planes, which can stay in the air for as long as 28 hours and fly over hurricanes at altitudes greater than 60,000 feet, will be operated by pilots in ground control stations at Wallops and Dryden Flight Research Center at Edwards Air Force Base, Calif.

The mission targets the processes that underlie hurricane formation and intensity change. The aircraft help scientists decipher the relative roles of the large-scale environment and internal storm processes that shape these systems. Studying hurricanes is a challenge for a field campaign like HS3 because of the small sample of storms available for study and the great variety of scenarios under which they form and evolve. HS3 flights will continue into early October of this year and be repeated from Wallops during the 2013 and 2014 hurricane seasons.

The first Global Hawk arrived Sept. 7 at Wallops carrying a payload of three instruments that will sample the environment around hurricanes. A second Global Hawk, scheduled to arrive in two weeks, will look inside hurricanes and developing storms with a different set of instruments. The pair will measure winds, temperature, water vapor, precipitation and aerosols from the surface to the lower stratosphere.

"The primary objective of the environmental Global Hawk is to describe the interaction of tropical disturbances and cyclones with the hot, dry and dusty air that moves westward off the Saharan desert and appears to affect the ability of storms to form and intensify," said Scott Braun, HS3 mission principal investigator and research meteorologist at NASA1s Goddard Space Flight Center in Greenbelt, Md.

This Global Hawk will carry a laser system called the Cloud Physics Lidar (CPL), the Scanning High-resolution Interferometer Sounder (S-HIS), and the Advanced Vertical Atmospheric Profiling System (AVAPS).

The CPL will measure cloud structure and aerosols such as dust, sea salt and smoke particles. The S-HIS can remotely sense the temperature and water vapor vertical profile along with the sea surface temperature and cloud properties. The AVAPS dropsonde system will eject small sensors tied to parachutes that drift down through the storm, measuring winds, temperature and humidity.

"Instruments on the 'over-storm' Global Hawk will examine the role of deep thunderstorm systems in hurricane intensity change, particularly to detect changes in low-level wind fields in the vicinity of these thunderstorms," said Braun.

These instruments will measure eyewall and rainband winds and precipitation using a Doppler

radar and other microwave sensors called the High-altitude Imaging Wind and Rain Airborne Profiler (HIWRAP), High-Altitude MMIC Sounding Radiometer (HAMSR) and Hurricane Imaging Radiometer (HIRAD).

HIWRAP measures cloud structure and winds, providing a three-dimensional view of these conditions. HAMSR uses microwave wavelengths to measure temperature, water vapor, and precipitation from the top of the storm to the surface. HIRAD measures surface wind speeds and rain rates.

The HS3 mission is supported by several NASA centers including Wallops; Goddard; Dryden; Ames Research Center, Moffett Field, Calif.; Marshall Space Flight Center, Huntsville, Ala.; and the Jet Propulsion Laboratory, Pasadena, Calif. HS3 also has collaborations with partners from government agencies and academia.

HS3 is an Earth Venture mission funded by NASA's Science Mission Directorate in Washington. Earth Venture missions are managed by NASA's Earth System Science Pathfinder Program at the agency's Langley Research Center in Hampton, Va. The HS3 mission is managed by the Earth Science Project Office at NASA's Ames Research Center.

For more about the HS3 mission, visit:

http://www.nasa.gov/HS3

For more information about NASA's Airborne Science Program, visit:

http://airbornescience.nasa.gov