“A man was killed and 30 others were injured as tornadoes hit Faridpur Sadar upazila and Pabna’s Sujanagar on Monday evening.”

 

More here: http://www.thedailystar.net/backpage/1-killed-30-injured-tornado-1386493

AGT always understimates DBZ compared to US radars so don’t read much into that. There are two storms that approach this area one in the early evening and one around midnight. It’s not known which caused the damage. Since there is no video and not enough pictures to verify tornado damage it’s hard to say for certain that it wasn’t a microburst, however it was not associated with a bow and instead an isolated cell, so it’s assumed to likely be a tornado.

“At least five people were killed and at least 50 others were severely injured as a tornado hit parts of Faridpur district yesterday afternoon”

Read more: http://www.dhakatribune.com/bangladesh/2016/08/22/tornado-flattens-faridpur-factory-five-dead/

Note: Tornado video online purporting to be from Fairdpur is in fact taken in Oklahoma, USA. This tornado was associated with  remnants of Tropical Storm Dianmu and likely occurred earlier in the day. While Bangladesh outlets use tornado fairly freely, extratropical cyclones commonly produce tornadoes in the United States and it’s possible that was the case here.

The location suggests likely influence of the Khasi Hills outflow boundary.

I was contacted by Jon Finch after the 22nd due to a radar image seeming to show a very tornadic looking storm, at the time I was unable to find any conclusive evidence a tornado had occurred. But now several videos have surfaced showing a tornado occurring on the same date, area and appearing to be the same time (near sunset). We believe this is sufficient confirmation that the first known tornado since Brahmanbaria has occurred in Bangladesh.

Two supercells were seen radar, one in the 12z-13z timeframe and one right behind it which showed a strong hook in the 13-14z timeframe. We are still trying to verify which supercell is responsible based on time and location. Despite the resolution and RF noise, there appears to be 40+kts of RFD clearly showing. Over the course of  5 hours there were four hook echoes showing in this same general line.

We are currently investigating a supercell that formed at 7z just over the border into India and by 12z impacted Jessore and about an hour later Khulna. Damage was reported in both towns including several fatalities. Early on the storm appeared to have a hook echo and had an impressive reflectivity core per Kolkata radar.

6z surface analysis shows impressive 87/80 south wind.

Storm now near Jessore, nearby obs is backing at 88/81.

This sat pass shows the storm right as it started going, the dryline shows pretty substantial cumulus development.

7.34 micron imagery

A woman was killed, 10 others were injured and over 10,000 houses damaged as nor’westers lashed Chuadanga, Bagerhat and Jhenidah districts on Tuesday.

An elderly woman was killed as a nor’wester hit several upazilas of Chuadanga in the evening, reports UNB.

Witnesses said Sabina, a resident of Majdah village in Alamdanga upazila, died on the spot as a wall of her house fell on her after being hit by the storm around 6:30pm.

Besides, several hundred houses were damaged and thousands of trees uprooted during the storm in different areas of the district.

Power supply to different areas got snapped as a number of electric poles were uprooted by the storm.

 

Two women were killed as a tree collapsed on them during a storm that ravaged Abhaynagar upazila of Jessore district on Wednesday night.
At the same time, roughly 5,000 birds of different species were killed as the nor’wester wreaked havoc at Tirerhat village in Jessore sadar upazila.
Officer-in-charge of Abhaynagar police station Sheikh Nasiruddin said Laxmirani Mandol, 35, daughter of Bhushan Mandol, a resident of Dul village, and Sahida Begum,45, daughter of Sohrab Hossain Khan, a resident of Ektapur village, were killed as a tree collapsed on them during a storm in the upazila at about 7:30pm.
Several hundred houses were also damaged by the storm.
Meanwhile, locals said they found around 5,000 birds, including Doel, Shalik, Masranga, Bulbuli and Ghughu, lying dead at different places of Tirerhat village after the storm on Thursday morning.

 

 

On February 24th, the severe weather season came in with a bang when a severe thunderstorm hit the city of some 16,000,000 people. Clearly from the video and from the fatalities there was some significant straight line wind damage though standards of construction require less winds to be severe than should be expected in a developed country.

What we do know is that it appears to have taken place in the middle of the day with a 75F temp and 66F dewpoint with a 5kt SE wind blowing into Dhaka.

Authorities said a hailstorm that followed dark clouds and thunder caught Dhaka residents off guard. Several districts in the southwest, including Barisal and Chittagong, also experienced a storm on Wednesday.

In Narsinghdi, two sisters were killed when a wall collapsed on them during the storm. In Naraynganj, six people were killed when a trawler sank in the Dhaleshwari River. Two people were also killed in separate incidents of lightning strike in Moulvibazar.

A large section of the Supreme Court’s fence collapsed when trees fell on it. At Sirajdikhan in Munshiganj, 25 grade 10 students of the Kajishal Hajigaon Humayun Molla High School sustained injuries when the tin roof collapsed during class.

Meanwhile, 13 community health center workers, who were protesting to demand the nationalization of their jobs, were hurt when they were hit by hail at the Central Shaheed Minar. Rains in Dhaka and surrounding areas had been forecast by the Met Office because of an easterly low in the region.

In Thursday’s forecast, it said rain or thunder shower along with gusty or squally wind is expected to occur in Barisal, Chittagong, Khulna, Dhaka and Sylhet divisions. The Met Office added that the weather may remain mostly dry with partly cloudy sky elsewhere in the country.

 

Picture showing some initial development in Kolkata

Severe storms hit Bangladesh on March 6th, including a splitting supercell with left/right moving pair, occurring during peak heating and splitting. This represents the second notable severe weather outbreak in the area the first causing significant hail in Dhaka on February 24th. The supercell weakened relatively quickly but part of the northern cluster did hit the southern Dhaka metro but had weakened to be nothing more than a regular thunderstorm.  

While Dhaka was only at 68 degree dewpoint and 90 degrees, further to west at an agricultural mesonet station it registered around 89 degrees temparture and 75 degrees dewpoint.

Here’s a look at some notable storms that took place in 2014 from our Radar archive.

These storms formed on an old outflow boundary and contained quite a strong core.

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During our final chase in Bangladesh that had had us heading up Kishoreganj, we came upon an area of fresh damage including collapsed buildings and a rather large area of broken coconut trees. We conducted a quick survey (with not much time since we needed to get farther north).

The damage occurred around 6pm on April 26th according to several eyewitnesses and collaborated by radar data. No one witnessed a tornado but rather just an intense storm with straight-line winds. An analysis of the area seemed to show the path was no greather than 300m and all trees were downed in the direction of storm motion.

There was a substantial but modified pool of cooler air left over from the previous nights convection as shown on this threat assessment from Tim Vasquez made in the afternoon.
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