Today's Top Weather Stories
On Weather & Climate Through the Eyes of Mark Vogan
9.20PM TROPICAL UPDATE
Hermine Performing well over Texas, Gaston will redevelop and Wave coming off Africa will be a US threat a week in 10 days from now!
By Mark Vogan
As Hermine refuses to weaken as it floats northwards over Texas, we may see rains over a foot in areas from San Antonio to Dallas, even up to Oklahoma City.
Gaston will redevelop and may be a Gulf threat within the next 5 days, but I am in the thinking that the system now out off Africa will be a hurricane threat to the US in 10-days from now. By then, we're likely to see others pop up and become hurricanes. The busiest period of the season looms by the weekend and into the following week!
Tropical Storm Hermine slams northeast Mexico and South Texas with nasty wind and rain
By Mark Vogan
Tropical Storm Hermine continues a near north track that took it from the far north Mexican coast where it made landfall last night, up through the Rio Grande River Valley throughout the early morning hours and now spins over interior South Texas. The highest sustained winds were reported at the Harlingen Airport where maximum "sustained" winds were clocked at 55 mph and a gust to 72 mph was reported there accorcding to the National Hurricane Center.
This system will hold it's own well as it continues moving further and further north and inland, this will be excessive rains up through Texas and even into Oklahoma before absorption by a warm front. The atmospheric conditions, though over land remains good and with the mountains to the west and southwest of circulation and the constant warm, moist, tropical flow continuing to feed into the system from the south, this storm should remain a storm for the next 6-10 hours before being downgraded to a depression.
National Hurricane Center Latest
Tropical Storm HERMINE Public Advisory
Tropical Storm HERMINE Forecast Discussion
TROPICAL STORM HERMINE LINKS
Hermine's Flooding Rain, Gusty Wind Expanding in Texas
AccuWeather News
Tropical Storm Hermine spreads strong winds, heavy rains through Texas
CNN
IN OTHER NEWS
BBC Weather
The classic American Summer and rest of the Northern Hemisphere shows signs of resting and soon will be gone for another year!
By Mark Vogan
As California and the Northeastern US states cool off again after a warm spell, the pattern is becoming more and more progressive as wavelengths broaden as though we still see substantial heat (for time of year) where 80s and 90s still get up into Canada. As cooler air becomes stronger and expands in coming everyday from now on as hours and heights of sunshine over the Arctic is growing shorter. The warm pools are starting to show signs of shrinking as that cooler and increasingly colder air is sharpening up cold fronts which drop down from Canada and sweep west to east across the Lower 48, that cold front is becoming stronger, bringing a larger drop in temperature behind it. It's also apparent that as that cooler, drier air swings down, it's taking slightly longer for the warm, more humid air to return, particularly for more areas of the U.S.A and indeed throughout the Northern Hemisphere.
When's the First Single Digit or Sub-Zero morning low coming for the High-Elevation Plateaus, Basins and Valleys of the America West, Midwest, Northeast?
Did you notice the 17 degree low at Stanley, Idaho yesterday morning? I also noticed more 30s and even 20s showing up this morning on The Weather Channel's "Actual Lows" graphic.
As those troughs drive fresher, cooler, crisper air down into the Western US where basins and valleys of High-Alititude within the Rockies see that cooler but very dry air cool much easier at night where hours of darkness are longer at this late stage in summer, it's only a matter of time before the lows at classic, high-elevation cold spots such as Stanley, Idaho, West Yellowstone, Montana, Shirley Basin, Wyoming, Lake Yellowstone, Wyoming and indeed Bodie State Park, California see lows drop below the 10-degree mark. I wouldn't be surprised that as the trough of much chiller air from the Gulf of Alaska drops down over the Rockies the next 4-5 days that within the much colder air aloft and even lesser moisture than in mid-summer the dynamic effect of radiational cooling will be sufficient enough now (this week) where we see the first single digist lows in those classic pockets within the mountains where the air from the gently surrounding slopes flow cold air down to valley and basin bottoms.
Today's Weather across America
From AccuWeather
Brief Summer Spike, then Back to Autumn in Northeast
By Alex Sosnowski, Expert Senior Meteorologist
Fire Near Boulder Fueled by Very Low Humidity, Gusty Winds
By Meghan Evans, Meteorologist
Weather Talk
By Mark Vogan
Strong Mid and Upper-level support for surface low produces a gust to 94 knots (108mph) on top of Cairngorm Mountain near Aviemore, Duluge for Northern Ireland
Over the past few days we have seen our fair share of stormy weather across Britain and indeed Ireland and Northern Ireland.
Dan Corbett, BBC Meteorologist noted in a broadcast (see above) that Lough Fea, Northern Ireland recieved some 106.8mm in 3 days, bare in mind a month's worth is only about 65mm, so impressive indeed, we also saw some very heavy rains across southern England, Wales and as the front progressed northeastwards over the past 36-hours, so the band of rain and strong winds followed.
The Northern Ireland deluge may have been helped been warm waters over the Irish Sea and as that warm, moist flow was pulled up by the trough of low pressure, centered just west of Ireland, the warm, moist air flow would have drawn energy once hitting the cold front and thus producing heavy and persistent rains as well as strongest winds right were the cold front was situated. The warm, moist flow crossing above normal water temperatures over the English Channel and Irish Sea may have fuelled those higher rain amounts. with basically a colliding of air masses right over both warmer than normal waters and over Northern Ireland, those two factors brought that excessive 30-day rainfall amount. The cooler, dry air behind the front and being pulled southeast on the backside of the low pressure reduced rainfall to a more scattered nature as well as dropping wind speeds notably over Northern Ireland as well as Wales and southern England, but as things clamed down there, the band of heavy rain and gale-force winds continued to ridge that relatively strong cold front ahead of the main low, high-elevations on the leeside of the Penninnes and Yorkshire Moors also recieved very heavy rains and coastal gales with even gales over exposed higher areas. This line of nasty weather then progressed north into Dumfries and Galloway as well as the Lothians and Borders, though by the time it arrived into the Central Belt, it may have lost some of it's sting over slightly cooler North Sea and North Channel waters, as well as the crossing of the rugged terrain of Wales and the English Pennines.
What I did notice here in Lennoxtown was an increase in winds last night out of the east, mild air as southerly air spun around the base of the trough and along the cold front, winds increased as the fron appraoched and then a period of moderate rains arrived but nothing too excessive, that tells me that the front weakened on it's way north like they can do from time to time.
As for strong wind speeds, it wasn't last night that winds were strongest over Scotland but in fact yesterday morning where a gust to 108mph was reported on top of 4,085 foot Cairngorm Mountain which sits just east of Aviemore and in the heart of the Grampian Mountains, this mountain often experiences the strongest winds. I even believe we may have seen a stronger mid-level low or energy over the surface feature, the surface feature being the driving in our weather down nearer sea level which meant a uniform 20-30mph wind was driven by the surface low, also perhaps bringing those higher winds to between 800-1,500 foot hills which saw perhaps 35-50mph but beyond the 3,000ft level or higher winds were considerably higher and likely driven by mid to even upper levels dynamics such as a strong jet stream flowing directly overhead, some times when dynaics are right and there is a nearby mid-level low or upper low, above a certain level, the winds say, 40 to 50 mph higher than only 500 to 1,000 ft below can be because the higher altitude's weather is driven by the mid or upper level low, rather than surface low, also when a jet stream is flowing ocerhead, an area called the "front-right rear entrance region" can drop "extreme winds" downwards towards the ground and therefore freak wind gusts can occur in what appears to be a typical setup when a low pressure system is present and in control of a regions weather.
East Facing Scottish Mountains may see heavy downpours tonight!
As those winds contonue howlling in off the North Sea, those North Sea facing slopes in the Central and Northern Highland may see some very heavy rains as wells as strong gales, toucing "severe gale-force" above 4,000 ft, upslope of moist air will be responsible for heavy rains in the hills as upsloping moist air cools with height and condenses producing enhancement to the rainfall! The Scottish Lowlands and Central Belt will remain dry with a light breeze and some clearing of skies tonight, remaining mild pretty much everywhere as temps stay in the 50s like we've seen the past few nights.
Vagaries of the Weather
India & Sub-Continental Asia Weather
By Rajesh Kapadia
Tuesday, September 07, 2010
Since its arrival on the 3rd, this low from the Bay has lingered on in the Orissa region for the last 4 days, without any significant movement, and throwing all forecasts into the bin.
From 1002 mb yesteday, it has become marked at 1000 mb on Tuesday evening.
On Tuesday evening, it is stationary over Orissa (Thai map), and in this constant position, has precipitated very heavy rains in regions south/south west of the low in the last 2 days. Regular formation of thick clouds were seen in the Vidharbah/Chattisgarh and west M.P. areas due to this position hugging system ! Rains, in the these areas, were as much as 222 mms were recorded in Brahmapuri (Vidharbha) today, Jabalpur 106 mms yesterday, and Jalpaiguri 210 mms on Sunday.
See Full Post On our Partner's Blog HERE!
What's Reaching Today's Blogs?
Worldwide Controversy About Hurricane Earl
Jesse Ferrell, AccuWeather
Another Unseasonably Cool Air Mass for the West
Ken Clark, Western Expert, AccuWeather
Fading Days of Summer
Joe Lundburg, AccuWeather
Today's US Extremes
Courtesy of AccuWeather
High: 114 degrees at Death Valley, CA
Low: 18 degrees at West Yellowstone, MT
Today's UK Extremes
Courtesy of the Met Office
High: 71 degrees at Gravesend
Low: 45 degrees at Exeter Airport
Today's Extremes here at my house
High: 61 degrees
Low: 52 degrees
Thanks for reading.
-Mark
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