Category Archives: Colorado Weather

Storms on the Horizon – Celebrity Stormchasers Nearby

A storm front on the Colorado plains.After three consecutive days with temperatures over 85, change is in the air. Low pressure is intensifying over the foothills this afternoon and as a result the chance of thunderstorms is on the increase.

East of a line from Greeley to Byers will be where the greatest threat for severe storms will be. Large hail, damaging winds and tornadoes are a distinct possibility. Closer to the foothills and the metro area, late afternoon and evening will bring gusty winds and a chance for small hail. Scattered showers are possible through midnight.

The slow moving low will help keep temperatures down near normal for the foreseeable future after today however they also will provide for a chance of thunderstorms each day. Some of these storms may become severe although telling where and how widespread this activity will be is difficult. Certainly the northeastern plains have the greatest chance to see some excitement.

A number of advisories are in place at the current time. The southeastern part of the state is under Fire Weather Watches as things are tinder dry. In the mountains, much of the state west of the Continental Divide is under Flood Advisories. The recent warm temperatures have spurred fears of faster than normal snow melt and many rivers and streams are expected to reach flood stage.

This time of year just about anything can be expected. Keep an eye on the skies – especially if you are going to be outdoors for the upcoming holiday weekend.

StormChasersFor those that have seen the Discovery Channel’s StormChasers TV series, you may find it interesting to know that I have just learned that the StormChaser team is currently in Fort Morgan at this very moment.  As mentioned above, severe storms are likely over the northeastern plains this afternoon and evening and they apparently are there expecting the same and hoping to get some good data.  For those that haven’t seen this series, it is a MUST SEE for anyone interesting in severe weather or storm chasing!

Vehicles and Tornadoes – A Deadly Mix

A truck displays the damage a tornado can do to a vehicle.This past weekend a deadly spate of tornadoes struck Oklahoma and Missouri, killing at least 22 people. More than a third of those died in cars despite the fact that vehicles are one of the worst possible places to be when a twister strikes.

“It’s like taking a handful of Matchbox cars and rolling them across the kitchen floor,” said Sgt. Dan Bracker of the Missouri State Highway Patrol, surveying the damage in and around Seneca, near the Oklahoma line, the hardest hit area. “This is devastating.”

Experts warn that just about any place is better than a vehicle. In the extreme situation that you simply cannot get away from a tornado or find more appropriate shelter, abandon your vehicle immediately. Lie down in a ditch or culvert and cover your head. This isn’t a particularly good option, but it is safer than remaining in a vehicle.

If you haven’t already, you may wish to read our “Severe Weather 101 – Tornadoes” for more information.

Click here for a related news story.

Top Internet Weather Resources

The Internet has an incredible amount of information out there.  Weather websites abound, some better than others.  Everyone of course knows about the local TV station websites that provide a quick, glossed over look at the weather but what if you want to know more?  These five sites are great places for more in depth information.

Weather UndergroundWeather Underground – Like many weather sites, the Weather Underground is a one stop shop for everything weather.  All of the standard stuff like conditions and forecasts from around the U.S. and the globe are here.  A few things set it apart from others though.  First are the weather maps that you see when you visit their main page – temperature, dew point, wind, satellite, fronts and more are all easily accessible.  The second and most unique feature is the network of Personal Weather Stations (PWS) that provide data to the Weather Underground.  Clicking on the “Personal Weather Stations” link toward the top right of their site allows you to select a state and then view data from one of thousands of weather stations operated by weather enthusiasts.  Look at the Colorado list and you will almost certainly be able to find a station within a couple of miles of your home.  You can then view real time conditions for that station thus providing you with a more accurate view of the conditions where you live – not 20 miles away at Denver International Airport or downtown.

National Weather ServiceNational Weather Service (NWS) – Unbeknownst to most folks is that the United States’ government run weather service is quite unique in the world.  No country has a government department with the resources of our own National Weather Service.  On weather.gov you will find a dizzying array of information from weather conditions and radar to climatological and severe weather information.  In terms of sheer amount of information available, it is second to none.  Where it does suffer however is in usability – it just isn’t always that easy to find what you are looking for.  It is there though and well worth spending some time investigating.  Also be sure to check out our local Denver / Boulder Weather Forecast Office for information specific to Colorado.

The Weather ChannelWeather Channel – By far the most “commercial” of weather websites, this is the online arm of the TV station of the same name.  Surprisingly the depth of information isn’t as great as one might expect considering its name and reputation but it is still a good site to remember.  I would consider this a good “consumer” weather website for someone just wanting the no frills basics without all the details.  One neat new feature is the weather maps that the Weather Channel now provides via Google Maps.  Click here to view them.  Using this map you can zoom in on an area of the country and view current conditions.  The neatest thing though is the overlays that you can add to the map including cloud cover and radar.

NOAANational Oceanic & Atmospheric Administration (NOAA) – This government agency is a one stop shop for all things related to the climate.  Like their website says, “Our reach goes from the surface of the sun to the depths of the ocean floor as we work to keep citizens informed of the changing environment around them.”  NOAA operates everything from satellites that monitor the sun and the Earth from space to more terrestrial monitoring of our climate and environment.  Long term forecasting and data analysis provide the public, government and researchers with information vital to understanding the world in which we live.  Like many government sites, there is a ton of information here but you do have to hunt for it a bit.

ThorntonWeather.comThorntonWeather.com – Of course I have to plug my own website!  There are hundreds of personal weather stations across the state and many provide their data free to the Internet public.  With data from my own weather station coupled with the many freely available resources on the Internet, my website is a bit of a one stop weather information center, particularly for those living in the north metro area.  Everything you need in a weather website is there – current conditions, forecasts, radar, maps, weather news, climatological information, historical data, education and even lightning detection.  Be sure to check it out – you will probably be surprised just how much is readily available to a weather enthusiast!  Two other metro area personal weather station websites that are run by fellow weather geeks that I help maintain are ArvadaWx.com for those on the west side of town and ReunionWeather.com for those to the northeast.

Top 10 Lightning Myths & Facts

Lightning is the number two weather killer in the United States (behind floods). Here is Colorado we seem to be particularly blind to the dangers the phenomenom presents as we are ranked #2 in the U.S. for lightning related deaths. Over the years, a number of myths have developed about severe weather safety and lightning in particular. Here’s a few that you may want to keep in mind: Continue reading Top 10 Lightning Myths & Facts

May 2008 Weather Preview – Be Ready for Anything

May 2008 Weather PreviewThe one constant about May weather is change.  Colorado natives and those that have lived here long enough know that Denver and Colorado weather changes considerably throughout the year. The month of May almost seems to pack an entire year of weather conditions into 31 days. You name it, it can happen.  Click here to read our May 2008 weather preview for more information

Hail and Possible Tornado on Eastern Plains

Much of the eastern plains found itself under a Tornado Watch late Wednesday afternoon as a number of thunderstorms moved through the area. At about 5:00pm radar indicated a possible tornado 22 miles northwest of Burlington. Being a rural area, this has not been confirmed yet however storm spotters have reported hail up to 1.5 inches in diameter from the storm cell. Further south at about the same time, radar detected a storm with some serious rotation about 27 miles northeast of Lamar. One inch hail was recorded in the area but no tornadoes. Below are radar captures of the two cells at their prime.

These storms have moved east into Kansas at this time however the area remains under a Tornado Watch until 9:00pm. This serves to highlight that this is the severe weather season and while these particular storms were a good ways from the metro area, everyone needs to be prepared.

Colorado Storm Chasers – Start Your Engines!

Storm Chasers - Get Ready to RollIt looks like Wednesday will bring Colorado storm chasers their first chance to hit the road! A dryline is expected to develop and move eastward across the plains, east of Watkins. As this happens the chance for severe thunderstorms along and east of this line will be pretty good, possibly opening the door for large hail and tornadoes. The northeast corner of the state could be interesting to watch tomorrow.

Closer to home along the Front Range, a Red Flag Warning is in effect for Wednesday for most of the central part of the state. This low humidity and the winds are making things tinder dry so please, be very careful.

Never been on a storm chase? Here’s a sample:

Red Flag Warning in Effect, Experts Warn of Wildfire Danger

Red Flag Warning TodayA Red Flag Warning has been issued for most of the state as warm temperatures and low humidities have increased the danger of fires getting out of control. This was witnessed first hand last week with the four wildfires in southern Colorado that quickly got out of hand.

Further, the AP is reporting that while we have had record snowpack this winter, that doesn’t necessarily translate to decreased fire danger.

Wildfire experts say the problem is the winter was short, which means the trees and plants absorbed less moisture than if the snow cover had been around longer.

They say that’s one of the factors behind a fire near Carbondale last week that burned 1 and 1/2 square miles.

Capt. Shaun Moore of the Greater Eagle Fire Protection District says the snowpack could actually boost the wildfire risk because the snow has helped grass grow taller. That could make it easier for flames to leap to trees when the grass dries out.

PLEASE be careful out there!

A RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING.

GUSTY SOUTHWEST WINDS AND VERY LOW RELATIVE HUMIDITIES ARE EXPECTED THIS AFTERNOON INTO THE EARLY EVENING HOURS. AS A RESULT A RED FLAG WARNING HAS BEEN ISSUED FROM 12 PM TO 8 PM MDT. AREAS IN THE WARNING WILL AGAIN INCLUDE THE INTERSTATE 25 CORRIDOR AND NORTHEAST PLAINS OF COLORADO.

SOUTHWEST WINDS OF 15 TO 30 MPH WITH A FEW HIGHER GUSTS CAN BE EXPECTED THIS AFTERNOON AND WILL CONTINUE INTO THE EARLY EVENING HOURS. IN ADDITION…RELATIVE HUMIDITY WILL DROP TO AROUND 10 PERCENT. THE GUSTY WINDS AND LOW HUMIDITIES WILL COMBINE WITH DRY FUELS TO CREATE CRITICAL FIRE CONCERNS THROUGH EARLY THIS EVENING.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT.

Beautiful Weekend Ahead!

Beautiful weekend ahead!Time to get outside this weekend!  The forecast looks absolutely beautiful with a high of 76 expected on Saturday and 72 on Sunday.  This is why we all love Colorado. 

Southern parts of the state and much of the western slope do currently have Red Flag Warnings or Fire Weather Watches posted.  As we saw earlier this week with the fires near Ordway and Fort Carson, conditions are ripe in some places of the state for dangerous wildfires.  A Red Flag Warning means that critical fire weather conditions are either occurring now or are imminent. A combination of strong winds, low relative humidity and warm temperatures will create explosive fire growth potential.  One has not been issued for northeastern Colorado – yet.  Indications are we could find ourselves under one on Sunday if conditions persist. 

One last note…  If you are interested, there are still opportunities to attend the National Weather Service storm spotter training.  There will be two sessions in Commerce City on April 30th and a few others around the metro are in the next couple of weeks.  Click here to see the schedule.  These are great sessions for anyone interested in wanting to learn more about our severe weather.  You can read more about the spotter program here.

From Near Record Heat to Snow!

Snow todaySpringtime in Colorado!  Tuesday the official high in Denver hit 82 degrees, just two degrees shy of the record for that date.  At ThorntonWeather.com we were a bit warmer with a high of 85.1 degrees.  Now, 24 hours later, we are preparing for a pretty decent snowstorm.  What fun! 

We’ll reach a high of 50 on Wednesday but it will be shortlived as an upper level cold front moves across the state.  After noon we will start to see a rain and snow mix fall across the Front Range which will turn to entirely snow tonight.  2 – 4 inches of the white stuff can be expected in the metro area although much of that will melt quickly with as warm as the ground is.  Thornton can expect to be at the lower range of that spectrum as the worst of this storm will hit the southern Front Range.  The Palmer Divide and parts of Douglas, Elbert and Park Counties are under a Winter Storm Watch as they are expected to be hit a bit hard with this storm. 

The good news is that this cold front should bring some relief to those fighting the wildfires in the southern part of the state.  However, ahead of the front strong winds are blowing which will cause more grief until some precipitation starts falling and humidities climb.  Much of the southern part of the state is under a Red Flag Warning through 6:00pm Wednesday.