Archive for the Extreme Weather Category

Very warm Mediterranean sea – and what that means for severe weather in the autumn

Posted in 2017, Extreme Weather, Uncategorized with tags , , on August 4, 2017 by theboldcorsicanflame

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Take a short look at the weather patterns across the Mediterranean in the autumn that produce severe weather and how high sea surface temperatures may affect them.
There are several weather patterns that generate particularly severe thunderstorms across the Mediterranean, particularly the N-CNTRL part. As summer progresses into autumn increasingly deep troughs enter the Mediterranean region, producing severe weather setups.

Major flooding – particularly along the Ligurian coast (NW Italy) and north Adriatic region (NE Italy, W Slovenia, NW Croatia)

Increasingly deep troughs over the northern Mediterranean with secondary cyclogenesis frequently establish slow moving strong surface wind convergences over the Ligurian sea. Lifting along the convergence and strong jetstream aloft produce long convective lines of training thunderstorms, that produce persistent torrential rainfall along the Ligurian coast. Cumulatives of 200-400 mm / 24h are not unusual. Along the northern Adriatic sea, training cells usually form in the Friuli region (Italy) and Kvarner (Croatia), where upslope flow and forced lift occurs along the slopes of the Alps and Dinarides. These persistent setups often produce rainfall episodes lasting 24-48 hours, with cumulatives 200-400 mm / 24h not unusual. Particularly high sea surface temperatures may result in a more moist airmass advected into these setups and higher amounts of rainfall. See some examples of these intense autumn flash flooding events in the northern Mediterranean region.

Tornadoes – particularly along the Ligurian coast (NW Italy), Tyyrhenian sea coast and central Mediterranean

In November 2011

Higher sea surface temperatures and moister airmass combine with deep troughs to produce very unstable environments. Additionally, the deep troughs are rounded by strong jetstreams providing strong winds aloft. Secondary cyclogenesis over the northern Mediterranean often results in very strong low level / surface southerlies, providing strong vertical veering wind profiles, conductive for supercells and tornadoes.

In particular, the same setups that produce training cell convective lines in Liguria also tend to produce tornadoes.

Also, as autumn progresses and deep troughs reach further into the central Mediterranean. With remaining high instability in place (2000+ J/kg MLCAPE not unusual in November in S Tyrrhenian sea and central Mediterranean) and very strong deep layer shear, wedge tornadoes do occur.

Check their articles on tornadoes in Italy and Croatia too.<

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http://www.severe-weather.eu/theory/very-warm-mediterranean-sea-and-what-that-means-for-severe-weather-in-the-autumn/

ROME- Italy’s heatwave is not expected to end soon and will even get hotter

Posted in 2017, Extreme Weather, Uncategorized with tags , , on August 4, 2017 by theboldcorsicanflame

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A heatwave that has left Italy sweltering in record temperatures sparked wildfires Thursday which claimed the life of one elderly woman and forced the closure of a major highway. The 79-year-old woman was found dead in a field next to her home in Sant’Omero in the central region of Abruzzo, having apparently been overcome by flames that engulfed two hectares of surrounding farmland.

A section of the Via Aurelia coastal motorway that runs northwards from Rome to the Riviera had to be closed for several hours because of a major fire near Grosseto in Tuscany. The region’s celebrated landscape is usually baked to a rich golden colour by the end of the summer: this year it resembles burnt toast with August barely underway. With peak temperatures topping 40 degrees Celsius (104 degrees Fahrenheit) in much of the country, a total of 26 major towns and cities were on the health ministry’s maximum heat alert.

In many cities, record highs have already been overtaken by recent temperatures, according to statistics from Centro Epson Meteo. In Alghero, the record of 40.4 degrees in August 2003 has been beaten by 42 degrees. On Tuesday in Florence, temperatures reached 41.3 degrees which is the highest temperature the Tuscan capital has seen since its hot summer of 2013.  A new all-time record was made in Perugia and L’Aquila on Tuesday, with temperatures rising to 40 degrees and 38 degrees respectively. Being 700 metres above sea level, L’Aquila’s hot Tuesday was especially unusual for the capital of the southern Abruzzo region. Another Tuesday record was seen in Potenza at 37 degrees. 

 August’s heatwave is the result of the anticyclone coming from North Africa and the hot air it is carrying from Western Sahara, the press office for meteo.it reported. It is the fifth heatwave to hit Italy this summer and expects to be the most intense one, due to its long duration of a week, temperature peaks and its territorial spread. 

Admissions to hospital emergency units have spiked 15 percent in recent days and forecasters see no respite coming before early next week. High humidity in the north and hot winds from Africa in the south are making the perceived temperatures seem even hotter for Italians longing for the beach.

The heatwave has come on the back of a prolonged drought that is set to cost Italy’s large agricultural sector billions with 11 regions facing critical water shortages. Olive yields in parts of the country are forecast to be 50 percent lower than normal this autumn and the scarcity of water has cut sheep’s milk production by 30 percent in others, with knock-on effects for the production of one of Italy’s most popular cheeses, pecorino.

http://hisz.rsoe.hu/alertmap/database/index.php

July 25, 2017:Violent hailstorms hit Italy, covering beaches in white

Posted in Extreme Weather, Uncategorized with tags , , , , on July 29, 2017 by theboldcorsicanflame

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A violent hailstorm hit Italian towns of Grottammare and San Benedetto del Tronto, Marche province in central Italy on July 25, 2017, covering towns and their sandy beaches in a thick layer of ice.

The storm, accompanied by heavy rain and violent wind bursts, dropped significant amounts of hail, with some of the hailstones as big as tennis balls, local media report.

Hailstones damaged roofs, windows, cars and other infrastructure. Numerous calls have been made to emergency services

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https://watchers.news/2017/07/26/violent-hailstorms-hit-italy-covering-beaches-in-white/

Violent hail storm bombards Istanbul, leaves at least 10 injured

Posted in 2017, Extreme Weather, Uncategorized with tags , , , , , , on July 29, 2017 by theboldcorsicanflame

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Hail damage on an Airbus A320 which landed through the severe hailstorm at Istanbul Ataturk Airport, Turkey yesterday, July 27. It encountered hail at about 5,000 feet (~1500 m) altitude. Major damage to the nose and windshield. Report: Sieć Obserwatorów Burz

A severe storm hit Istanbul, Turkey’s most populated city, on Thursday, July 27, 2017, with heavy rain, strong winds and hail stones up to 9 cm (3.5 inches) wide. The storm caused widespread damage and injured at least 10 people. The city was hit by a similar storm on July 18, leaving most of it under water.

Thursday’s storm lasted only 20 minutes but it hit during the evening rush hour and was so violent that it managed to knock down trees, damage buildings and cars, disrupt both road and air traffic and cause new rounds of flash flooding throughout the city. Several airplanes landing at Istanbul’s Ataturk sustained major hail damage. 

Officials said that 7 000 emergency workers were called in to help after the storm uprooted 230 trees, destroyed 90 roofs and sparked fires across the city. Strong winds toppled a large crane that landed on oil barrels at a port, causing an explosion and a fire that injured at least one person.

Eurasia Tunnel, which connects Istanbul’s Asian and European sides under the Bosporus Strait, was closed as a precaution again.

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https://watchers.news/2017/07/28/istanbul-hailstorm-july-27-2017/

Sea level rise isn’t just happening, it’s getting faster…..!

Posted in 2017, Extreme Weather with tags , , on July 26, 2017 by theboldcorsicanflame

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A new study finds the chief acceleration behind rising seas is the melting of the Greenland ice sheet. Here, Yaneisy Duenas (left) and Ferando Sanudo walk through a flooded parking lot to their boat at the Haulover Marine Center in north Miami. (Joe Raedle/Getty Images)

This story has been updated.

In at least the third such study published in the past year, scientists have confirmed seas are rising, and the rate of sea level rise is increasing as time passes — a sobering punchline for coastal communities that are only now beginning to prepare for a troubling future.

What was a 2.2 millimeter per year rise in 1993 was a 3.3 millimeter rise in 2014, based on estimates of the mass changes of a number of key components of sea level rise, such as the melting of the Greenland and Antarctic ice sheets, the study in Nature Climate Change found. That’s the difference between 0.86 and 1.29 inches per decade — and the researchers suggest further sea level acceleration could be in store.

The chief cause of the acceleration was the melting of the Greenland ice sheet, which went from contributing under 5 percent of all sea level rise in 1993 to contributing over 25 percent in 2014, the study found.  The loss of ice in Antarctica and  smaller glaciers over the same time period also contributed to quicker sea level rise.

TO BE CONTINUED ON

https://www.washingtonpost.com/news/energy-environment/wp/2017/06/26/sea-level-rise-isnt-just-happening-its-getting-faster/?tid=ss_tw&utm_term=.70a79f429681

Extreme flash flooding hits Istanbul after heaviest rain since 1985, Turkey

Posted in 2015, Extreme Weather, Uncategorized with tags , , , , on July 19, 2017 by theboldcorsicanflame

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Turkey’s most populated city, Istanbul suffered extreme flash flooding on Tuesday, July 18, 2017, after rainstorm dumped 4 months worth of rain in just 12 hours. It was the most severe rainfall the city has seen in the past 32 years, but only the first of several waves of rainstorms expected. Meteorologists say the rains will last until Wednesday evening.

Light showers reached Istanbul late Monday, July 17, and turned into extremely heavy rains at 08:30 local time (05:30 UTC), Tuesday when huge black clouds covered the city, effectively ending the summer heat.

According to Doğan News Agency, the city was hit by most severe rainfall in the past 32 years, with 128 mm (5 inches) of rain before the first storm was over. This is more than four times the average for the month of July (32.5 mm / 1.3 inches), its driest month, and more than the region usually records during entire December, its wettest month.

According to a statement issued by Istanbul Metropolitan Municipality, 65 mm (2.5 inches) of rain fell on the city center within 1 hour, accompanied by winds of up to 80 km/h (50 mph). In total, the city center and western districts saw 110 mm (4.3 inches) of rain before 14:00 local time when the second wave of heavy rain was expected.

MORE INFO ON

https://watchers.news/2017/07/18/flash-flood-istanbul-july-18-2017/

Posted in 2017, Extreme Weather, Uncategorized with tags , , on July 16, 2017 by theboldcorsicanflame

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Upd. When Date (UTC) Event Country Location Level Details
2 4 days ago. July 12 2017 06:26 AM Heat Wave Spain [Nationwide] Multiple areas Damage level
3 7 days ago. July 09 2017 02:57 AM Forest / Wild Fire Canada [Province-wide] Province of British Columbia Damage level

Short time events

Upd. When Date (UTC) Event Country Location Level Details
0 2 hours ago. July 16 2017 12:56 PM Flash Flood Malaysia [Greater Kampong Mesapol Lama area] State of Sabah Damage level
0 2 hours ago. July 16 2017 12:44 PM Extreme Weather India [Rajkot, Morbi, Jamnagar and Surendranagar districts] State of Gujarat Damage level
0 3 hours ago. July 16 2017 12:29 PM Vehicle Accident India [Amarnath region] State of Jammu and Kashmir Damage level
0 11 hours ago. July 16 2017 04:05 AM Extreme Weather Russia [Asia] Moscow, Capital City Damage level
0 11 hours ago. July 16 2017 04:03 AM Tornado USA Livingston, State of Texas Damage level
0 11 hours ago. July 16 2017 03:59 AM Biological Hazard USA [Silverwood Lake, San Bernardino Mountains] State of California Damage level
0 11 hours ago. July 16 2017 03:57 AM Extreme Weather Chile [Nationwide] Multiple areas Damage level
0 11 hours ago. July 16 2017 03:54 AM Environment Pollution Bangladesh Barisal, Barisal Division Damage level
0 11 hours ago. July 16 2017 03:49 AM Biological Hazard USA [Escambia County] State of Florida Damage level
0 11 hours ago. July 16 2017 03:36 AM Extreme Weather USA [Greater Phoenix area] State of Arizona Damage level
0 11 hours ago. July 16 2017 03:30 AM Forest / Wild Fire USA [Los Padres National Forest] State of California Damage level
1 1 days ago. July 15 2017 03:07 PM HAZMAT USA [St. Raphael s Hospital] New Haven, State of Connecticut Damage level
0 1 days ago. July 15 2017 02:42 PM Epidemic Hazard Kenya Nairobi, Capital City Damage level
0 1 days ago. July 15 2017 07:45 AM Flash Flood USA [Shelby County] State of Tennessee Damage level
1 1 days ago. July 15 2017 04:01 AM Fire USA [Marco Polo Apartments] Honolulu, State of Hawaii Damage level

Long time events

Upd. When Date (UTC) Event Country Location Level Details
2 3 days ago. July 13 2017 04:17 AM Epidemic Hazard Bangladesh Sitakunda, Chittagong Division Damage level
0 3 days ago. July 13 2017 03:40 AM Forest / Wild Fire Tunisia [Provinces of Nabeul and Beja] Multiple areas Damage level
1 3 days ago. July 13 2017 03:20 AM Extreme Weather Pakistan [State-wide] State of Punjab Damage level
1 4 days ago. July 12 2017 11:17 AM Climate Change Antarctica [ A68 Iceberg (Larsen C Ice shelf)] Weddel Sea Damage level
1 4 days ago. July 12 2017 07:48 AM Unusual geological event Mexico Pueblo Viejo, State of Michoacan Damage level
2 5 days ago. July 11 2017 02:36 PM Forest / Wild Fire Italy [Mount Vesuvius] Campania Damage level
1 5 days ago. July 11 2017 01:31 PM Heat Wave Jordan [Nationwide] Multiple areas Damage level
0 8 days ago. July 08 2017 04:03 AM Forest / Wild Fire Canada [Near to 100 Mile House] Province of British Columbia Damage level
0 8 days ago. July 08 2017 03:59 AM Epidemic Hazard Nigeria Lantang, State of Plateau Damage level
0 8 days ago. July 08 2017 03:45 AM Volcano Activity Russia [Asia] [Maly Semyachik Volcano] Kamchatka Peninsula Damage level
1 9 days ago. July 07 2017 03:27 AM Epidemic Hazard USA Spokane, State of Washington Damage level
0 9 days ago. July 07 2017 03:08 AM Forest / Wild Fire USA [Medicine Bow National Forest] State of Wyoming Damage level
1 13 days ago. July 03 2017 03:40 AM Climate Change Russia [Asia] [Area of Seyakh] Yamalo-Nenets Autonomous Okrug Damage level
1 14 days ago. July 02 2017 11:54 AM Biological Hazard USA [Muleshoe National Wildlife Refuge] State of Texas Damage level
1 18 days ago. June 28 2017 03:14 AM Forest / Wild Fire USA [Prescott Valley area] State of Arizona Damage level
0 19 days ago. June 27 2017 01:38 PM Biological Hazard Belgium Wangenies, Wallonia Damage level
0 19 days ago. June 27 2017 03:30 AM Drought USA [State-wide] State of North Dakota Damage level
2 19 days ago. June 27 2017 03:11 AM Heat Wave Greece [Nationwide] Multiple areas Damage level
0 19 days ago. June 27 2017 02:57 AM Epidemic Hazard USA [Santa Fe County] State of New Mexico Damage level
1 20 days ago. June 26 2017 03:29 AM Epidemic Hazard India [Kodigunjuvalasa of Araku Valley] State of Andhra Pradesh Damage level
1 23 days ago. June 22 2017 04:34 PM Biological Hazard South Africa [States of Mpumalanga and Gauteng] MultiStates Damage level
1 42 days ago. June 04 2017 10:55 AM Volcano Eruption Indonesia [Mt Marapi Volcano] West Sumatra Damage level
6 59 days ago. May 17 2017 06:44 PM Volcano Eruption USA [Bogoslof Volcano] State of Alaska Damage level

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