Severe Weather
Severe weather possible through the afternoon and evening across Eastern Colorado
The severe weather outlook changed slightly since our post Thursday to cover more of the metro areas. A Severe Thunderstorm Watch is in effect through 9pm for all of Eastern Colorado. From Friday afternoon through the evening, strong to damaging thunderstorms will be possible east of the mountains, over the metro areas and on the plains. Here is the latest outlook from the SPC, showing a Sligh
Derecho
Saturday's wind event was a derecho: a widespread, long-lived wind storm which brought gusts to 110 mph to Colorado
Yesterday's incredible wind storm which formed over the Great Basin Saturday morning then raced across the Colorado and into the High Plains Saturday afternoon was an impressive event for this region, and one that will be classified as a derecho in the history books. What's a derecho? From the Storm Prediction Center: > A derecho (pronounced similar to "deh-REY-cho" in English, is a widespread, long-lived wind storm associated with a band of rapidly moving showers or thunderstorms variously k
Denver Weather
Stay Weather Aware Friday, Weekend Rain and Snow
As a cold front approaches (that we mentioned in our last post) Friday there is the increased likelihood for severe weather, including the Denver area. The overall dynamics have come together for many areas to have large to potentially damaging thunderstorms Friday, particularly the sheer environment. The varying wind throughout the lower and middle atmosphere will support rotating thunderstorms starting in the midday near Denver, and that area of rotational availability moves east later in the
Severe Weather
Friday's Severe Weather Outlook: May 16th, 2019
A storm system will strengthen while it moves through the region Friday. This system will spark several thunderstorms, and the environment will provide lots of energy for thunderstorms to be potentially damaging. The SPC outlook shows enhanced risk areas in Nebraska and Texas, and slight risk areas from the Dakotas and Iowa south into Texas. Here is a snapshot of the 3km NAM late Friday afternoon showing multiple discrete thunderstorms in an environment where damaging hail, wind, and tornadoe
Severe Weather
Afternoon Storms Likely to Become Severe Across Northeast Colorado
As discussed in Friday's Insider update today's weather could be quite active across northeast Colorado. Current temperatures are in the 60s across northeast Colorado at this hour, with dew points in the 50s – so it certainly has "that feel" for an active storm day: Storms are likely to develop along the Front Range by early to mid afternoon, and move northeast across the plains through the evening. Storms that do develop will have the potential
Severe Weather
First Tornado Warning and Report of the Year
Early Monday evening the state's first tornado warned storm produced the first tornado for the state this year. This was in far eastern Elbert County, northeast of Kiowa and Southwest of Agate: At 5:10 pm the Boulder office issued the tornado warning as rotation became tighter and just as the radar noted a couplet, sure enough, a tornado was spotted. Well, at least a funnel cloud was spotted with associated dust swirl at the ground level. It was later determined that the witness account matc
PM Update
A Good Chance of Storms for Northeast Colorado on Friday; Weekend Outlook
Temperatures are warm across the state today, with mostly dry conditions as well. Highs will top out in the mid 80s for Denver, with Red Flag Warnings in effect for El Paso county and much of western Colorado. The record high for the date is 91°F set back in 1964 so we likely aren't in danger of breaking that... but temperatures are running well above the average of 73°F nonetheless. Friday will be cooler with a better chance of showers and sto
Severe Weather
Severe Storms Take Aim at High Plains Today, Including Portions of Northern Colorado
Severe weather to hit portions of Colorado, Wyoming, Montana, South Dakota, and Nebraska Monday. Below are the outlook areas, showing the highest likelihood of damaging storms to be in Wyoming (red): Notice that there is a slight and elevated risk that covers portions of Northern Colorado from Denver to the north. An elevated risk for Colorado is not common, although we do see slight risk categories often this time of year. Here's today's historical climatology for tornadoes, suggesting torn
Hail
Tuesday PM Update: Springtime in the Rockies
From snow one weekend... to summer heat the next... to the severe weather we saw yesterday. It's been quite a stretch for weather across the Front Range and eastern Colorado. Things set up just as expected yesterday, unfortunately that equated to a damaging hail storm for much of the metro area – especially on Denver's west and north side. Hail the size of golf balls rained down under a large severe thunderstorm around 3pm on Monday. Hundreds of cars [http://www.denverpost.com/2017/05/09/denver
Severe Weather
Wednesday PM Update: Cooler and Stormy to End the Week
It's been quite a week for severe weather across eastern Colorado, especially the far eastern plains, and yesterday even Denver got in the mix when an isolated severe thunderstorm steamrolled over the city. Take a look at all the Severe Thunderstorm Warnings (yellow) issued by the National Weather Service over the last two 2.5 days – the two polygons over Denver are from last night's storm, with several tornado warnings (red) having been issued over recent days across the plains: The storm over
Severe Weather
Update on Threat of Severe Weather For Eastern Colorado Monday
An active couple of days is in store for us in Northeastern Colorado, with Monday likely being the most active severe-wise out of the two. This evening we're seeing a good round of storms developing along and east of I-25, some of these will be severe. Greatest threat as we outlined last night will be the potential for heavy rainfall with these storms. A trough that is currently located over California will eject east and w
State of the Atmosphere
The State of the Atmosphere: Sunday, May 8th, 2016
Saturday brought Colorado's biggest severe weather day of the year to northeast Colorado, and a hearty reminder of what season we are entering. Several tornadoes were reported Saturday afternoon, one west and north of Wiggins during the early afternoon hours, then several reports later in the day across extreme eastern Colorado in Yuma county. The late-day tornado north of Wray, Colorado damaged several out buildings, flipped tractors, and gave several people minor injuries as it put on a maste
Denver Forecast
Weekend Outlook: A Few Severe Storms Saturday, Showers on Mother's Day for Some
The average date of the first 80° day for Denver came and went on April 28th and we still haven't managed to hit the mark. Yesterday, while many locations topped 80°, Denver International Airport did not, making it to 79° Thursday afternoon. As of this posting DIA has reached 78° today, and may reach that 80 degree mark this afternoon, but with the cloud cover it could be we land short once more. As we head into the weekend our temperatures will cool a bit, with highs both Saturday and Sunday f
Severe Weather
Today's Severe Weather Outlook Ahead of Weekend Rain, Snow
Looking for our latest snowfall forecast? Here's our discussion from yesterday: In the Weekend Battle of Rain vs Snow, Snow Likely Wins in Many Locations , another update will be out this afternoon. -------------------------------------------------------------------------------- While heavy snow and rain will likely be the main concern with this weekend's system, we also hav
Severe Weather
Severe Storm Slams Denver, Brings Hail, Flooding Rain, and Damaging Wind to City
Bike to Work Day hit high water Wednesday as a severe thunderstorm brought heavy rain, hail, and damaging wind to Denver. Rainfall totals in excess of 2" were reported across the city in just a short period of time, pushing river levels high once more and flooding local streets. Storms developed over the foothills around 4pm Wednesday, and quickly pushed east into the metro area. As these storms developed they consolidated over the city and slowed, leading to heavy fl
Denver Forecast
Friday Severe Weather Update
11:00am: Saturday's severe weather outlook . -------------------------------------------------------------------------------- Another day, another round of severe weather on tap for eastern Colorado. Yesterday's storms brought another round of damaging hail and 9 preliminary tornado reports (from two storms). The first tornado touched town near north of Simla, Colorado and dropped south through the early evening hours. Matt Makens was on it: > Capture image
Denver Forecast
Thursday's Severe Weather Outlook; Storms Through the Weekend
There were 90 hail storm reports nationally Wednesday to the Storm Prediction Center, of those 40 were in Colorado. Storms broke the cap around 3:30pm, and proceeded to pound the metro area and Palmer Divide with heavy rain, lightning, and hail. Several reports of golf ball sized hail were made from the storm near Elizabeth, CO early Wednesday evening. Despite quite a bit of rotation in yesterday's storms, none produced tornadoes. Low level flow was not all that strong as indicated by yesterday
Denver Forecast
Severe Storms Likely Today, Stay Weather Aware
Yesterday we discussed the potential for severe weather today across northeast Colorado, this appears on track. Storms will develop along the I-25 urban corridor Wednesday afternoon and evening, and will be capable of producing damaging hail and even tornadoes. A cold front is pushing through northeast Colorado this morning ushering plenty of low level moisture behind it for storms today. With the passage of the front, plenty o
Denver Forecast
Severe Weather Threat Wednesday and Thursday
As discussed briefly in this week's State of the Atmosphere , the severe weather threat will increase Wednesday and Thursday across northeast Colorado. The Storm Prediction Center has increase the severe weather outlook to "Enhanced" for Wednesday across northeast Colorado, southwest Nebraska, and northwest Kansas, with a hatched area (10% or greater probability of significant severe weather within 25 miles of a point) just east
Denver Forecast
Severe Weather Expected for Several Days
Colorado prepares for several days of hail, wind and tornado threats Those within Colorado and the surrounding region must be ready for severe weather the next few days. Most especially those in Kansas and Oklahoma. With enough heating today, Colorado will become active shortly after lunch. The SPC has us outlined in an marginal to slight risk for the day. Throughout this posting, note that Denver is on the edge of the severe threat(s); our greater concern is for areas southeast of the city tod
Denver Forecast
Chance for Severe Storms Today
Severe thunderstorms possible on the plains today. Although the metro areas have a chance for thunderstorms, the risk of a severe/damaging storm is highest east of I-25. Looking at eastern Colorado, thundershowers will develop by 2pm. As these move east they will move into an area with more energy for them to gain strength. From 2 to 7pm there is a risk of severe storms for the Colorado plains before the storms move into Kansas. Sunset will bring an end to any severe activity for Colorado.
Forecasting
The Importance of Shortwave Troughs and How to Identify Them
With the severe weather season upon us, I thought I would revisit and update an old post I wrote before joining Weather5280. Shortwave troughs are features in the general flow of the atmosphere that are very important when it comes to forecasting, particularly for convective features and winter weather. Shortwaves can be thought of as "weather-makers," whereas Longwaves (Rossby Waves) might then be "trend-makers." Multiple shortwave troughs can be imbedded within a Rossby Wave trough. Shortwave
Denver Forecast
Severe Thunderstorms, Even a Tornado, Possible Friday
Fri 11:00am: Snowfall Totals List -------------------------------------------------------------------------------- Severe thunderstorms and even a tornado are possible today over the eastern plains. This, despite the snow and cold that sit on many of us near the Denver metro area. The storm system spinning the moisture upon us will spark thunderstorms over the eastern plains today. The ingredients will be there for damaging storms with the possibility
Severe Weather
Severe Storms Possible Over High Plains
A strong, slow moving storm is moving through the region now . This system will spread rain, snow, and severe thunderstorms from the mountains to the high plains through the weekend. Wednesday morning the storm center was over central and northern Utah. From there, it has tracked southeast and will move over Colorado’s mountains through the evening. Rain and snow will be possible over the state, mostly northern areas.
State of the Atmosphere
The State of the Atmosphere: Sunday, September 28, 2014
It’s hard to believe that a month which started with temperatures so far below normal through the first 10 days would end up above average on the month. It appears, however, as though this will be the case thanks to a streak for 10+ days with well above normal temperatures going into this weekend. We are now running 1.5 degrees above normal for the month with just a few (albeit cooler) days to go. For precipitation we saw pretty much the same thing. The month started well above normal thanks to