Not exact matches
Two major factors are creating
hurricane - friendly
conditions in the Atlantic region, which includes the Caribbean Sea and Gulf of Mexico: warm water and a lack of
wind shear.
La Nina, characterized by colder temperatures in the Pacific around the equator, affects weather in the Atlantic
hurricane region as well, in the form of less
wind in the tropics and therefore more hospitable
conditions for
hurricanes.
Satellite imagery is used for all sorts of climate study, from identifying
conditions that allow infectious diseases like West Nile virus and cholera to emerge, to creating models for predicting
hurricanes, to distinguishing natural resources such as
wind, water and sunlight.
Toxic chemicals released by floodwaters, stress, infection and dangerous working
conditions will all contribute to
hurricane death toll years after
winds die
By Joanna D. Samson, Vice President of FOTAS By the time it hit the South Carolina Coast,
Hurricane Matthew had been downgraded from a Category 5 to a Category 2 storm; but the 85 mph
winds, 10 - 14 inches of rainfall and extraordinarily high storm surges nevertheless created life - threatening
conditions and caused the wide - spread destruction of property.
Before that we had the swell from
Hurricane Gaston arrive simultaneously with persistent onshore
wind that created less than optimal surface
conditions.
We are now in a post-La Nina year, which tends to result in low -
wind conditions across the Atlantic
hurricane zone.
The sleepy Atlantic Ocean
hurricane season ended yesterday, with the development of a Pacific Ocean El Niño
condition predictably shifting
winds into a pattern that stifles Atlantic storms.
A
hurricane watch means
hurricane conditions, including
winds of at least 74 mph, are possible within 36 hours.
McNoldy said the
conditions are ripe because we're precisely in the middle of
hurricane season and there's little
wind shear, a
condition in which layers of air at different altitudes move at different speeds and which tends to break up
hurricanes.
«Changes in extreme
wind conditions related to small scale
hurricane - type storms can not be skillfully detected in models that have a resolution to [o] coarse to resolve th [ese] storms»
* Changes in extreme
wind conditions related to small scale
hurricane - type storms can not be skillfully detected in models that have a resolution to coarse to resolve this storms.
«The authors write that «the El Niño - Southern Oscillation (ENSO) is a naturally occurring fluctuation,» whereby «on a timescale of two to seven years, the eastern equatorial Pacific climate varies between anomalously cold (La Niña) and warm (El Niño)
conditions,» and that «these swings in temperature are accompanied by changes in the structure of the subsurface ocean, variability in the strength of the equatorial easterly trade
winds, shifts in the position of atmospheric convection, and global teleconnection patterns associated with these changes that lead to variations in rainfall and weather patterns in many parts of the world,» which end up affecting «ecosystems, agriculture, freshwater supplies,
hurricanes and other severe weather events worldwide.»»
Harvey's rapid intensification from a tropical depression to an 85 - mile - per - hour
hurricane in less than 24 hours was due to favorable
conditions — warm water and low
wind shear [29]-- in the Gulf of Mexico, where sea surface temperatures were up to 2.7 - 7.2 °F (1.5 - 4 °C) above the 1961 - 1990 average.
They found that the GNSS - R satellite data successfully sensed
wind speed
conditions in each
hurricane compared with these other data sources.
The El Nino
condition in the Pacific Ocean is one factor which can increase «
wind shear» over the Atlantic, thereby limiting
hurricanes even as other forces may be strengthening them.
There are other factors in determining
hurricane frequency, the prediction earlier this year for the North Atlantic was a low count due to developing El Nino
conditions and the resulting increased
wind shear.
During the months of September 2006 through May 2007, forecasters at the NOAA Ocean Prediction Center used QuikSCAT
wind measurements to identify 114 individual extratropical cyclones (64 in the North Atlantic and 50 in the North Pacific) containing extreme
hurricane - force
wind conditions.
Depending on the version of the algorithm, WindSat
wind retrievals can be biased either high or low in high -
wind - speed
conditions such as
hurricanes and extratropical cyclones;
XOVWM would include a dual - frequency Ku - band and C - band radar and an X-band radiometer, which would allow measurements in rainy
conditions, as well as measurements of the extreme
winds in
hurricanes and extratropical cyclones.
For example, when there are large changes in
wind speed at different altitudes (also known as «vertical
wind shear») above an area of the ocean, those
conditions can interfere with
hurricane formation.
If these
conditions exist for long enough, they combine to produce the violent
winds, voracious waves, and torrential rain we've come to associate with a
hurricane.
«When we see a specific
hurricane coming toward the coast, we issue a
hurricane watch — meaning
hurricane and
wind conditions may be expected in the next two days.