The Global Precipitation Measurement or GPM core satellite has provided meteorologists with a look at the towering thunderstorms and heavy rainfall occurring in Tropical Storm Erika as it moves through the Caribbean Sea.
On August 27, 2015, there were many warnings and watches in effect as Tropical Storm Erika continued to rain on Leeward Islands. A Tropical Storm Warning was in effect for Anguilla, Saba and St. Eustatius, St. Maarten, St. Martin, St. Barthelemy, Montserrat, Antigua and Barbuda, St. Kitts and Nevis, Puerto Rico, Vieques, Culebra, U.S. Virgin Islands, British Virgin Islands.
A Tropical Storm Watch was in effect for Guadeloupe, the northern coast of the Dominican Republic from Cabo Engano to the border of Haiti, the southeastern Bahamas and the Turks and Caicos Islands.
Tropical Storm Erika, the fifth named storm of the season, entered the northeast Caribbean early on the morning of August 27 as it passed through the Leeward Islands between Guadeloupe and Antigua. Fortunately, there were no reports of damage thanks in part to the effects of inhibiting wind shear, which kept the storm from strengthening.
Erika originated as a wave of low pressure that was first detected on Friday, August 21 midway between the West Coast of Africa and the Cape Verde Islands. The wave then tracked westward across the tropical mid Atlantic where it eventually intensified enough to become a tropical storm, Tropical Storm Erika, about three days later on the evening of August 24 (local time, EDT).
At this point, Erika was located about 955 miles due east of the Leeward Islands. However, despite being over warm water, Erika struggled to intensify as it approached the Leeward Islands over the next few days thanks to an upper-level tough of low pressure near Hispaniola in the north central Caribbean, which created westerly wind shear that disrupted the storm's circulation.
Two instruments aboard GPM captured an image of Erika at 17:26 UTC (1:26 p.m. EDT) on August 26 as the storm was nearing the Leeward Islands. Rain rates derived from the GPM Microwave Imager or GMI captured rain rates in outer area and the Dual-frequency Precipitation Radar or DPR instrument captured rain rates in the inner area. GPM showed rainfall of up to 52.8 mm (2.0 inches) per hour.
The images revealed that the low-level center of circulation was displaced well to the northwest of the storm's rain field, which contains areas of embedded convection (thunderstorms) necessary strengthen and maintain the storm. However, for the storm to intensify, those areas of convection need to be located close to the storm's core, which is not the case here due to the effects of wind shear. At about the time of this image, the National Hurricane Center reported that Erika's maximum sustained winds were near 45 mph, making it a weak tropical storm, and that Erika was experiencing moderate northwesterly wind shear as it moved westward near 17 mph.
At NASA's Goddard Space Flight Center in Greenbelt, Maryland, the DPR data was used to create a 3-D rendering of Erika. That 3-D image showed thunderstorm cloud tops reaching to just over 14 km (8.6 miles).
At 11 a.m. EDT (1500 UTC), the center of Tropical Storm Erika was located near latitude 16.4 North, longitude 63.3 West. Erika is moving toward the west near 16 mph (26 kph).
The National Hurricane Center (NHC) expects a turn toward the west-northwest later on August 27, and this general motion should continue for the next 48 hours. On the forecast track, the center of Erika will move near the Virgin Islands later today, move near or north of Puerto Rico tonight, and pass north of the north coast of the Dominican Republic on Friday.
Maximum sustained winds are near 50 mph (85 kph), and NHC expects little change in strength over the next two days. The estimated minimum central pressure is 1006 millibars.
For updates on the forecast and track, and local effects, visit the NHC web page: http://www.
GPM is a joint mission between NASA and the Japanese space agency JAXA.
Rob Gutro | EurekAlert!
Sediment from Himalayas may have made 2004 Indian Ocean earthquake more severe
26.05.2017 | Oregon State University
Devils Hole: Ancient Traces of Climate History
24.05.2017 | Universität Innsbruck
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy