Global & Disaster Medicine

Archive for the ‘Weather’ Category

Monsoon rains set in over the weekend in Bangladesh, flooding Rohingya refugee camps


“……a Rohingya boy….died when a mud wall of his shelter fell on top of him…..His mother also was injured in the collapse…..”

NASA: India heat

Weeks of Extreme Weather in India

India has been hit by a streak of unusually intense thunderstorms, dust storms, and lightning so far in 2018. The events collapsed homes, destroyed crops, and claimed the lives of over a hundred people with even more casualties, calling for assistance by Prime Minister Narendra Modi.

In late April, the state of Andhra Pradesh in southeastern India was struck by about 40,000 lightning bolts in 13 hours—more than the number of strikes that occurred in the entire month of May 2017 — striking people and livestock.

On May 2, 2018, a cluster of strong thunderstorms, accompanied by strong winds and lightning, swept through the Rajasthan region in the north, knocking over large structures and harming those in the way. The potent thunderstorms whipped up one of the deadliest dust storms in decades.

One week later, the same region was hit by more deadly thunderstorms that brought lightning, 110 kilometer (65 mile) per hour winds, and violent dust storms.

The map above shows aerosols, including dust, over northern India on May 14, 2018, around the time of the second dust storm. The aerosol measurements were recorded by the Ozone Mapping and Profiler Suite (OMPS) on the Suomi NPP satellite. The dust is naturally blocked from moving north by the Himalayan mountain range. In addition to causing accidents and poor air quality, dust aerosols can influence the amount of heat transmitted to Earth‘s surface by either scattering or absorbing incoming sunlight.

In recent years, extreme weather events such as heat waves, thunderstorms, and floods have been increasing in India, according to Ajay Singh, a climate change researcher with the Indian Institute of Technology Bombay. “Overall, the impact of global warming on the climate of India is clearly visible in the form of increased frequency and intensity of most of the extreme weather events,” said Singh.

Even with the increasing trend, the intensity of events so far this year is anomalous, said Singh. The unusual thunder and dust storms could have a combination of causes, including extra moisture from a cyclonic circulation over West Bengal colliding with destructive dusty winds. High temperatures in the area also made the atmosphere unstable, fueling thunderstorms and heavy winds.

The unusually high number of lightning strikes was caused by cold winds from the Arabian Sea colliding with warmer winds from northern India, leading to the formation of more clouds than usual. The spike in lightning this April was abnormal, but India has long been prone to lightning strikes, which are believed to cause more fatalities than any other natural hazard in the country.

acquired 1998 – 2013

The second map shows the annual average number of lightning flashes in India from 1998–2013. The visualization was made from data acquired by the Lightning Imaging Sensor (LIS) on NASA’s Tropical Rainfall Measuring Mission satellite and compiled by the Global Hydrology Resource Center (GHRC). Southeastern India usually experiences increased lightning activity before monsoon season, as heating and weather patterns become unstable and changeable.

Researchers are interested to learn how the spring 2018 lightning burst in India fits in with longer�term trends. Some years can be highly active without signaling a trend, said Dan Cecil, a scientist at NASA Marshall. For instance, a region near Andhra Pradesh had almost double the normal lightning flash rates in 2010, yet 2011 was almost exactly normal. The following years alternated between being slightly below normal and slightly above normal, according to satellite data.

NASA Earth Observatory images by Joshua Stevens, using OMPS data from NASA’s NPP Ozone Science Team, and lightning climatology from GHRC Lightning & Atmospheric Electricity Research. Story by Kasha Patel.

Suomi NPP – OMPS


Subtropical Storm Alberto will pose several threats to the South the first half of this week. Heavy rainfall and inland flooding is expected in the Southeast on Mon. and shift into the TN and OH River Valleys on Tues. and Wed. Tropical Storm-force winds and storm surge possible along the northern/eastern Gulf Coast on Mon. Alberto will create dangerous surf and rip currents for beachgoers.

Southern Mississippi Valley sector loop

Southeast sector loop

[Image of WPC Flash Flooding/Excessive Rainfall Outlook]

[Image of WPC QPF U.S. rainfall potential]





Weather all over…….

National Weather Outlook

Central Great Lakes sector loop

Northeast sector loop

Kenya: The Patel dam bursts after heavy rain, killing at least 27 and rendering 200 homeless.


A powerful dust storm has killed at least 81 people in northwestern India since late Wednesday


Bad weather tonight

SPC Products Overview

Today's Reports

An enhanced-to-moderate risk of severe weather for the Central and Southern Plains and into the Mid-Mississippi River Valley on Wednesday and Wednesday night.


“…..Severe thunderstorms with damaging straight-line winds, large to very large hail, and a couple of tornadoes will be possible…..”

SPC Products Overview

yesterday Filtered Reports Graphic


“…..t least 18 tornadoes were reported across Kansas, Nebraska and Oklahoma on Tuesday…..”




Weather here and there

Central Great Lakes sector loop

National Weather Outlook

Today’s storm is the fourth serious snow to wallop the Northeast this month

NY Times


A spring snowstorm is sweeping through the Northeast, the fourth nor’easter of the month.

A foot or so of snow is expected from the suburbs of Philadelphia to parts of New York City to coastal Connecticut and Long Island, with significant snow from Washington to Boston.

Nearly 5,000 flights have been canceled and La Guardia Airport suspended all flights.

Boston schools will be closed.

More than 35,000 homes in New Jersey have lost power.

NYC on a Thursday morning:

Good morning on this slushy Thursday.
It’s time to get outside and start digging.
The spring snowstorm that pummeled our city yesterday shed its final flakes around dawn. At 8.2 inches, it broke one record but left others intact. But more on that in a bit.
First, here’s what you need to know before heading out:
(For the latest commute news, read New York Today online here.)
New York City public schools are open.
Public transit is up and running. The subway, Metro-North and Long Island Rail Road are operating on regular schedules but could face delays.
New Jersey Transit trains, buses and light rail are operating on regular weekday schedules. Access Link will resume at noon and cross-honoring is not in effect.
Amtrak is running on a modified schedule.
It’s recovery day at the city’s airports. Kennedy, Newark and La Guardia are operational, but check your flight before you go.
The streets are schmutzy. The Sanitation Department has dispatched nearly 1,600 plows since the start of the storm. You can see which streets were plowed, and when, with their plow tracker.
Alternate-side parking rules are suspended for snow removal. Meters remain in effect.
With 12 to 18 inches of snow in the forecast, the nor’easter was expected to break the record for the largest spring snowstorm in our history. The previous record, of 10 inches, was set on April 3, 1915. A little after midnight, the ruler in Central Park read 8.2.
Your snow-shoveling experience may vary. The snow fell unevenly, dropping 11.7 inches in Bedford-Stuyvesant, 12 in Queens Village, 10 in Gramercy Park, and around 8.5 inches at both La Guardia and Kennedy.
“But Staten Island won the lottery,” said Patrick Maloit, a meteorologist at the National Weather Service. Port Richmond is waking up to 13.8 inches.
Even though parts of the city saw higher snow totals “the record is still going to the April storm,” Mr. Maloit said. Central Park is used for the official city total because record-keeping there is more extensive and “because, let’s face it, when you think New York City, you think Central Park, not La Guardia or Kennedy,” he said.
We did set one record yesterday, though. It was the most snow seen in New York on March 21.
And you can take comfort in knowing you lived through a spring snowstorm and the fourth nor’easter in one month, a super extra rare occurrence. The National Weather Service found at least one other instance of four nor’easters taking place in one month — between Dec. 30, 1986, and Jan. 26, 1987 — but that was in the dead of winter.
We’d advise against placing any bets on a fifth: Another big nor’easter this season is unlikely, and temperatures are expected to keep climbing in the coming weeks.
Today, cloudy with a high near 42. Tomorrow, drizzly, with a high of 44.


Recent Posts