Amir Mohsen
متخصص بخش هواشناسی
با تبریک فراوان به دوستانی که بارش باران رو در مهر ماه تجربه کردن و پیرو تفاسیر و عکس‌های زیبای امیر محسن عزیز از سامانهٔ شمال شرق:
تشکیل جبهه و سیکلون سطحی
۱-جبهه‌ی سرد :زبانهٔ پر فشار سیبری با مرکز ۱۰۲۴ mb دقیقا در شمال شرق و ترکمنستان
۲-جبهه‌ی گرم:زبانهٔ کم فشار حرارتی با مرکزیت ۱۰۰۸ mb بر روی خلیج فارس و حاشیهٔ جنوبی کشور
۳-عامل ایجاد ناپایداری:تراف تراز میانی و جت استریم
۴-تامین اکثر رطوبت سمانه توسط سیستم پر فشار ،جبهه‌ی گرم رطوبت چندانی نداشته
نکتهٔ جالب تاثیر این سیستم‌های پر فشار مرطوب شده توسط کاسپین بر روی شمال شرق هست که منبع دیگری‌رو به منابع بارشی این منطقه اضافه میکنه .
سلام و درود ویژه خدمت استاد عزیزم بهروز جان
خیلی ممنون از تفسیر زیبا و جامعی که ارائه دادید. انشاء الله هر چه زوذتر شاهد نفوذ و فعالیت یک سامانه فعال با بارش از نوع زیر در اصفهان باشید و تفاسیر زیبایی رو در این خصوص از اصفهان بشنویم:
Torrential Rain
Definition: Torrential rain is any amount of rain that is considered especially heavy. There is not a formal definition of torrential rains as recognized by the National Weather Service. The proclamation that rains are torrential simply means the amount of rain is abundant, had a fast on-set, or lasts for a long period of time. Hazards associated with torrential rains include flash floods, stream flooding, and landslides. Heavy rain events can also be accompanied by high winds and lightning. If it rains over an area for a long period of time, secondary damages can also result as the ground becomes saturated with precipitation. This can cause problems in watersheds and building stability. In addition, if temperatures are low enough, freeze-thaw cycles can cause problems for other structures including roadways.
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The cell in question had moved in from the NW, so as the radar shows it had been raining heavily for a while before the torrential stuff started to arrive with huge raindrops hitting the road with almost explosive force:
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In no time, a blinding downpour was in progress:
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Ducking in and out of the front door of the house I was in, I was able to grab a series of images, drying off the skylight filter in between shots, when a distant roaring sound began and got louder. Suddenly, a violent squall of even heavier rain and hail swept up the street, tearing apart the minor river of water flowing down it, bouncing inches into the air:
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Gutters were not coping and the water was literally streaming from the rooftops until it passed as suddenly as it had begun - a wild five minutes indeed![/SIZE]
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