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Severe weather thread number ...I think X ?


Typhoon Tip

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April 25-28 2011 only shifted 1500 miles ne.

The April 25–28, 2011 tornado outbreak was the largest single-system tornado outbreak ever recorded. It was also the costliest and one of the deadliest tornado outbreaks in history as well. The outbreak affected a large swath of theSouthern, Midwestern, and Northeastern United States, leaving catastrophic destruction in its wake, especially across the state of Alabama.[7] It produced destructive tornadoes in Alabama, Arkansas, Georgia, Mississippi, Tennessee, andVirginia, and affected many other areas throughout the Southern and Eastern United States across a four-day period from April 25 to 28, 2011, with the most intense activity on April 27. In total, 358 tornadoes were confirmed by the National Weather Service in 21 states from Texas to New York and in southern Canada. Widespread and destructive tornadoes occurred on each day of the outbreak, with April 27 being among the most prolific and destructive tornado days in United States history with a record 205 tornadoes touching down that day. Four of the tornadoes were destructive enough to be rated EF5 on the Enhanced Fujita Scale, which is the highest ranking possible; typically these tornadoes are only recorded about once each year or less.[7]

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Great disco from ALB

THE STORM PREDICTION CENTER HAS PLACED THE SOUTHERN HALF OF OUR

AREA...INCLUDING THE GREATER CAPITAL DISTRICT...IN A MODERATE RISK

OF SEVERE THUNDERSTORMS...WITH A SLIGHT RISK FARTHER NORTH. THE WIND

FIELD WILL BE INCREASING SIGNIFICANTLY...WITH DEEP LAYER 0-6KM SHEAR

LIKELY 40+ KT ALONG WITH CLOCKWISE TURNING HODOGRAPHS IN THE LOWEST

3KM. WITH FAIRLY LOW LCL HEIGHTS AND STRONG INSTABILITY/SHEAR THERE

IS A POTENTIAL FOR SUPERCELLS WITH A TORNADO THREAT WITH ANY

DISCRETE CELLS THAT FORM INITIALLY. THE CONVECTIVE MODE MAY END UP

SHIFTING TO MORE OF A BOW ECHO OR LEWP TYPE AS THE SURFACE CYCLONE

APPROACHES AND FORCING BECOME MORE FOCUSED DURING THE EVENING. WILL

HAVE A BETTER IDEA OF THE OVERALL EVOLUTION TOMORROW...BUT THERE IS

ENOUGH DATA TO SUPPORT A SIGNIFICANT SEVERE WEATHER EVENT WITH

POSSIBLE TORNADIC DEVELOPMENT AND/OR FAIRLY WIDESPREAD STRAIGHT LINE

WIND DAMAGE.

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Just want to clarify something... With a mid/u/a speed max rolling through the flow along and N of the warm boundary overnight there could just a likely evolve a general zone of isentropic lift related rains with embedded elevated convection. That would much less related to derechio kinematics. Derechios tend to develop and then cross into warm sectors to the right. Typically the day preceding them is hot/torrid already. This different than that.

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Good for him

The term has been tossed around quite a bit since the DC event, and the East Coast public is really just starting to hear and recognize the word because of it. I think part of why he may be saying it is because people understand that it means big wind is possible tomorrow.

The definition really is that it is producing nearly continuous wind or wind damage for over 240 miles. Not scattered severe wind, or taking a brief break before reorganizing.

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