Front Make Rut Wave

The atmospheric ridge that has been edifice over the Desert Southwest this past times calendar week has spread northward to the Colorado Front Range.  We reached an afternoon high of 100 degrees F yesterday in addition to facial expression to top that rate today.

Beneath this high pressure level dome, air sinks in addition to heats up.  In addition, cloud evolution is suppressed in addition to Pacific mutual frigidity fronts are shunted to the northward of the dome, reducing whatever run a hazard of precipitation.  Highs inwards the Desert Southwest accept exceeded 110 degrees F at lower elevations (e.g. inwards Phoenix in addition to Las Vegas) in addition to overnight lows accept barely dipped below xc degrees F.  To the east, across the Southern Plains in addition to lower Mississippi Valley, the estrus is less intense only is exacerbated past times humidity (with dew points inwards the mid seventies), producing a estrus index close 100 degrees F.

Fortunately, the higher peak in addition to drier air along the Front Range enhances radiative cooling at nighttime in addition to our overnight lows are falling into the low-mid sixties (still nigh 10 degrees higher upwards normal).  Here inwards Colorado, the atmospheric ridge is expected to retreat past times the weekend, bringing cooler temperatures in addition to a run a hazard for precipitation.

Canadian Refreshment

While the Trump Administration believes that our northern neighbors are a safety threat, I sure enough appreciate the cool, dry out air that they sent this agency (no tariffs attached).  This morning, it felt to a greater extent than similar belatedly September than belatedly June along the Colorado Front Range.

This welcome modify was the production of high pressure level over the Pacific Northwest as well as depression pressure level over the Northern Plains.  Between these atmospheric pumps, the pleasant Canadian air was driven southward, displacing the oestrus that has plagued us for the past times calendar week or so.  Colliding alongside that heat, the cool air may spawn thunderstorms afterward today.

Unfortunately, our expose volition move brief as well as the southwestern atmospheric ridge volition reclaim the Front Range past times Monday.  In the meantime, we'll savour highs inward the upper seventies as well as depression eighties as well as overnight lows inward the upper fifties (F).  My personal thank you lot to Canada for the refreshing air, nonetheless curt it's visit.

The Nature Of Rip Currents

As hordes of humans caput for the beach this summer, rip currents volition accept a deadly toll.  Unfortunately, they oft educate when conditions at the shore seem to hold upward ideal, catching many swimmers off guard.

Rip currents evolve due to a steady onshore menses of seawater; this may lawsuit from counterclockwise winds approximately an offshore tempest or from clockwise winds approximately a dome of high pressure.  In either case, H2O builds upward along the beach in addition to that pressure level leads to breaks inside the offshore sandbar; equally the retreating menses funnels through those breaks, potent rip currents (not ever evident on the surface) develop, sweeping bathers away from shore.  Those caught inwards a rip electrical current are advised to swim parallel to the shore until they are safely out of the channelized stream; unfortunately, panic oft sets inwards in addition to such advice is fatally ignored.

Today, equally Tropical Storm Chris churns 200 miles off Wilmington, North Carolina, rip electrical current warnings demand keep been posted for nigh of the State's beaches.  Visitors are strongly advised to brain those warnings in addition to to avoid unguarded beaches.  After all, rip currents are amidst the leading, weather-related causes of drib dead across the globe.

Perseids From The Sky

On my regular flights betwixt Colorado in addition to Missouri, I am commonly focused on the ground, studying the topography in addition to rivers; should it live on a nighttime flight, I sentinel for metropolis lights, observing the sequence of towns in addition to cities that I get got come upwards to memorize from my numerous route trips.

But tonight, equally I wing from Denver to Columbia, Missouri, I volition live on watching the sky.  This is the annual pinnacle nighttime for the Perseid Meteor Shower, produced past times remnant debris from the Swift-Tuttle Comet.  As the populace crosses the comet's path some the sun, the dust particles collide amongst in addition to ignite inwards our atmosphere, producing numerous meteors.  The Perseids are oft abundant in addition to are expected to growth inwards coming decades equally the comet's path to a greater extent than closely aligns amongst the ambit of our planet.

As I write this weblog from Denver International Airport, sunset in addition to our takeoff are nonetheless 2 hours away simply the radar shows that atmospheric precipitation is minimal betwixt hither in addition to Columbia, suggesting that high clouds volition non obscure my view.  Though the meteors are best observed later midnight, I promise to run across many from 30,000 feet, far removed from the "light pollution" on the ground.

Late Summertime Rut Wave

Following 2 weeks of relatively mild temperatures in addition to intermittent rain, the adjacent (and hopefully last) oestrus moving ridge is edifice along the Colorado Front Range.  Once again, it is the production of a high pressure level ridge, expanding northward from the Desert Southwest.  For the adjacent calendar week or so, afternoon highs are expected to accomplish the lower to mid 90s F, good higher upwards average for September.

Fortunately, the recent rains convey revived the vegetation in addition to the longer nights, combined amongst our high altitude in addition to thin, dry out air, convey allowed overnight temperatures to driblet into the fifties.  In addition, ascent hot air oftentimes ignites thunderstorms higher upwards the Front Range peaks, which in addition to thence drift eastward to render spotty relief from the heat.

Our run a jeopardy of these oestrus waves volition expire along until the jet stream becomes less stable inward mid autumn, undulating across the province in addition to dislodging warm atmospheric ridges amongst cool atmospheric troughs.  Snow unremarkably dusts the higher peaks past times like shooting fish in a barrel September in addition to upslope snowstorms by in addition to large coat the urban corridor past times mid October. 

A Snowstorm Inward Missouri

As I cook to provide to Colorado, a snowstorm has paralyzed much of Missouri.  Beginning every bit pelting yesterday morning, snowfall developed past times early on afternoon together with to a greater extent than than 10 inches accept accumulated hither inwards Columbia; low-cal to moderate snowfall is expected through the 24-hour interval together with a few to a greater extent than inches volition probable autumn earlier the tempest pushes off to the east.

After forming inwards New Mexico, the key depression of this strong wintertime tempest has stayed inwards southern latitudes, moving across the Texas Panhandle, Oklahoma together with Arkansas; it is expected to proceed that track, eventually crossing Georgia together with the Carolinas earlier heading out to sea.  Ahead of the low, southerly winds accept swept Gulf of United Mexican U.S.A. wet into a majority of mutual depression temperature air (reinforced past times high pressure level over the Great Lakes region).  Missouri volition probable have the brunt of the snowfall simply pregnant accumulations are likewise forecast for the Ohio Valley together with Virginia.

Thanks to my pickup, nosotros volition non hold upwards trapped past times the tempest simply close roads inwards key together with eastern Missouri remain impassable for cars together with efforts to clear suburban roads volition probable non laid about for a 24-hour interval or two; ability outages, due primarily to broken tree limbs, accept likewise plagued the region.  Though beautiful to behold, snowstorms remind us that, despite our modern structures together with vehicles, nosotros remain at the mercy of nature's power. 

Midwest Deep Freeze

Residents of the Upper Midwest are awaking to temperatures of twenty to xxx degrees below zippo (F) this morning; past times mid afternoon, tape depression high temperatures volition endure recorded across the share alongside nearly areas staying at or below minus 15.  In addition, steady winds volition create a wind-chill of minus 50 or lower.

The movement for this extreme weather condition final result is a dip inwards the northern jet stream, allowing Arctic air to plunge southward too and hence eastward; meanwhile, inwards Alaska, where the jet is curving northward, temperatures are good to a higher house normal.  As the atmospheric trough of frigid air drifts eastward, the atmospheric ridge that is forthwith over Alaska volition follow, allowing temperatures across the Upper Midwest to rebound inwards dramatic fashion; past times this weekend, highs close xl degrees F volition bathe the frozen landscape.

No doubt, those who deny global warming volition move this extreme, record-breaking chill to bolster their argument.  Of course, this is pure folly on their part; fifty-fifty every bit the climate warms, regional weather condition patterns volition permit polar air to fall southward at times.  It is the persistent ascent inwards global average temperature that has begun to threaten Earth's ecosystems and, eventually, the welfare of mankind.

Disappearing Peaks

This morning, it was sunny together with mild along the Front Range urban corridor.  Influenza A virus subtype H5N1 gentle southwest breeze was associated amongst the pleasant conditions, leading ane to uncertainty that snowfall powerfulness prepare past times nightfall.

But looking westward to the mountains, ane noticed that the higher peaks had developed a hazy appearance, contrasting amongst the sharp, sun-drenched terrain of the foothills; afterward inward the morning, that haze had coalesced into a ring of clouds that totally hid the peaks.  By early on afternoon, the current of air along the urban corridor had shifted from the north, the temperature had cooled significantly together with clouds had begun to supersede the vivid bluish sky.  The forecast of a coming tempest was therefore much easier to accept.

The high peaks of the Front Range are 30-40 miles westward of Metro Denver together with upward to 9000 feet higher inward elevation.  As tempest systems force inward from the west, the higher terrain is outset to demonstrate testify of the developing upslope; enveloped past times colder air together with already blanketed past times snow, the high terra firma is both the outset together with concluding expanse to sense atmospheric precipitation when tempest fronts deed through.  Clouds volition eventually lower over the urban corridor equally the current of air shifts from the northeast and, inward concert, the snowfall score volition descend from the crest of the Front Range to the Piedmont together with High Plains.

Spring As Well As The Equinox

For those of us who alive inwards the Northern Hemisphere, the jump equinox occurs today, when the sun's radiations falls lead on the equator; for individuals inwards the Southern Hemisphere, it is the autumn equinox.  While this astronomical Definition of the flavour makes feel from a global betoken of view, it has piffling to exercise amongst the onslaught of "spring conditions."

Spring has been unfolding across southern latitudes of the Northern Hemisphere for the yesteryear calendar month or so, equally flowers in addition to greenery adorn the landscape in addition to severe thunderstorms, around amongst devastating tornadoes, stimulate got ravaged the countryside.  Farther north, across Temperate latitudes, subtle signs of the flavour stimulate got likewise been apparent for weeks (crocuses in addition to skunk cabbage pushing through the frozen soil, chorus frogs calling from icy ponds in addition to a nifty of birdsong, to refer a few); nevertheless, polar fronts in addition to snowstorms proceed to threaten the region.  Even further northward (across the Arctic in addition to sub-Arctic) in addition to inwards the high elevations of our mount ranges, jump weather condition may non brand it for 2 months or more.

Indeed, despite the ubiquitous pronouncements on this "First Day of Spring," the flavour is a continuum, determined yesteryear latitude, superlative in addition to atmospheric patterns, the latter varying from twelvemonth to year.  Those of us along the Colorado Front Range, anticipating periods of snowfall into May in addition to regularly gazing toward the snow-covered peaks to our west, are less inclined to stimulate got a strict Definition of the season. 

Dorian Gains Strength

Hurricane Dorian, churning toward the Northern Commonwealth of the Bahamas together with the Atlantic Coast of Florida, has strengthened to a Category four tempest this evening, amongst maximum sustained winds of 130 mph.  Though withal far from the Florida Peninsula, at that spot are no atmospheric or oceanic features that advise weakening of the hurricane volition occur.

Indeed, a depression pressure level zone to its southwest has backed away, reducing the run a endangerment of meaning current of air shear together with the tempest volition shortly instruct into warmer waters equally it reaches the Commonwealth of the Bahamas together with the Gulf Stream.  The solely remaining enquiry is whether the high pressure level ridge to its northward volition shift eastward, allowing the hurricane to bend northward earlier it makes landfall inwards Florida.  Even so, a powerful tempest moving parallel to the coast volition probable create devastating tempest surge, beach erosion together with inland flooding.

Mandatory evacuations convey already been ordered for low-lying areas of Brevard County, Florida, together with many similar proclamations are expected inwards the days ahead.  Once again, climate modify may live on playing a business office inwards both the hurricane's intensity together with its coastal effects, equally body of body of water temperatures increase together with sea levels rise.  Followup posts are anticipated over the coming week.

Late Summertime Chinooks

This afternoon, the Colorado Front Range is beingness raked past times gusty, southwest winds.  Produced past times high pressure level over the Desert Southwest interacting amongst depression pressure level over the Northern Plains, these winds, downsloping from the Continental Divide, dry out out together with rut up, comparable to Santa Ana Winds inward Southern California.

Influenza A virus subtype H5N1 dry-line currently stretches due north to southward through Colorado, but due east of the Front Range urban corridor, together with volition probable hit thunderstorms i time it moves into to a greater extent than humid air on the Great Plains.  Here inward Metro Denver, behind the dry-line, the gusty downsloping winds convey delivered hot, dry, crystal-clear air together with nosotros await to a greater extent than or less other afternoon inward the 80s (F).

During snowfall flavour (October to May) these winds are known equally chinooks or "snow-eaters," since they chop-chop warm the urban corridor together with brand snowfall disappear from the landscape; much less welcome during burn season, they tin rank the axe plough a minor burn into a raging inferno.  Tomorrow, later a mutual coldness front end moves inward from the northwest, the chinooks volition nigh downwardly together with it volition experience to a greater extent than similar spill (at to the lowest degree for a twenty-four hr menstruum or two).