On Sunday, November 17th, 2013, an outbreak of deadly tornadoes occurred across the upper midwest region of the United States. 73 tornadoes were confirmed across Illinois, Indiana, Kentucky, Michigan, Missouri, and Ohio. Two of the seventy-three tornadoes were violent, of which both earned damage ratings on the Enhanced Fujita Scale of EF-4 (166-200mph winds). Both … Read more
Ten years ago today on the evening of May 4, 2007, the small town of Greensburg, Kansas, was nearly destroyed by a 1.7 mile wide EF-5 tornado, with a maximum wind speed of 205mph. Damage surveys concluded that about 95% of the city was destroyed, with EF-5 damage observed through the heart of Greensburg. The tornado tracked for … Read more
Our high-resolution maps of accumulated snowfall are updated several times a day for the United States and much of Canada. ● Today’s Snow Cover Stats ● Interactive Map Snow Cover Map (Current – High-Resolution) Note: Refresh the browser if data fail to load Today’s Snow-Cover Percent, Depth, & Liquid Equivalent (SWE) These stats include the … Read more
This page provides some basic, but very interesting statistics about category 5 hurricanes in the Atlantic basin since 1851. Category 5 storms are extremely rare. In fact, for the Atlantic Basin (including the Gulf of Mexico and Carribbean Sea) only 34* category 5 storms (~4% of all hurricanes) are found in the historical record. In … Read more
DST ends and clocks return to standard time (“fall back”) at 2:00 AM on Sunday, November 3, 2019. States that do not observe the time change: Arizona (except for the Navajo Nation) and Hawaii. How did DST get started? We have compiled an brief, but very interesting, history of daylight saving time When does DST … Read more
Update #1 [Monday February 6 at 1 pm EST] – Tom Moore A surge of colder air remains on schedule to push down into the northern U.S. on Wednesday, February 8th. The colder air mass will then move to the east and southeast on Thursday and Friday. As we indicated earlier, we are not talking about extremely cold … Read more
The “atmospheric river” is taking a direct aim on California, and that will result in eye-popping rainfall totals, heavy mountain snow accumulation, flooding, and mudslides. Weather conditions are ideal for an impressive and climatologically rare heavy-rain event over the weekend over a large section of California. Rainfall amounts from 8 to 12 inches are expected. … Read more
After a change to milder temperatures in late December for much of the U.S., the jet stream is in the process of taking another plunge southward into the nation. That will result in much colder temperatures over a significant portion of the U.S. during January. Late December Upper-Level Pattern In a previous article, we indicated that temperatures would be milder across … Read more
Global Wind 7-Day Satellite Loop Note: The purpose of this post is to share advanced forecasting techniques, not present formal research at this time. Example Case: April 17-18, 2016 Heavy Rain Event in North Texas ◙ I wanted to show some of the 48-hour rainfall amounts as of 7:00 am CDT April 18, 2016 (officially … Read more
During my 2016-17 winter break, I had the opportunity to work at the National Weather Service field office in Wichita, Kansas. Working with Chris Robbins, M.S. here at iWeatherNet had already shape much of my knowledge of the National Weather Service, since he worked for 15 years within the agency, including NOAA’s National Severe Storms … Read more
A brief spell of warmer temperatures are not uncommon across parts of the U.S. around the third week of January. The common term for this is a “January thaw“. What we have coming up later this week across much of Canada and the eastern two thirds of the U.S. is a January thaw to the … Read more
Those of us who live around Atlanta, Georgia or Dallas, Texas, who only see around 2 or 3 inches of snow per year on average, can be heard complaining during the winter when a snow event occurs. There are, however, many cities around the nation where considerably more snow falls and it becomes part of the … Read more
The Weather Bureau, now known as the National Weather Service, was established on February 9, 1870 by the 41st United States Congress and signed by President Ulysses S. Grant. On March 29, 1870, the new weather forecasting service was officially assigned to the U.S. Army Signal Service within the Department of War and given the … Read more
The United States is also home to the most frequent occurrence and the largest variety of extreme weather events of any other country in the world. These events include, but are not limited to, extreme heat/cold, snowstorms, tropical storms and hurricanes, droughts, areal and flash floods, hail storms, and tornadoes. While none of this is … Read more
Before I begin this piece, I want to present a challenge. The following chart shows the actual high and low temperatures for a full month in Atlanta, Georgia. *A condensed version of this writeup was also featured in the Douglas County Sentinel. Challenge: Can you spot the day with a historic snowstorm? During this particular … Read more
2019 Winter Solstice Saturday, December 21 at 11:19 pm EST Duration of Winter 2019-20: 88 days, 23 hours, 30 minutes How many days until winter? Winter 2019 Begins In How many days until the first day of spring 2019?
Do you have a dog that is terrified of loud noises such as thunder or fireworks? It can be devastating to watch as your dog shakes uncontrollably, pants, and paces every time a storm approaches or during Independence Day celebrations. Not too much is known as to why some dogs have a phobia of loud … Read more
Update #4 [Sunday January 15 at 1 pm EST] – Tom Moore The multi-day ice storm continues in the nation’s heartland. So far, the greatest amount of ice, reported by the NWS from this storm (.50″-1.00″), has occurred from parts of northern Oklahoma to southern Kansas and into southwest Missouri. Dangerous conditions continue Sunday from much of … Read more
A Few Interesting Facts and Myths About Daylight Saving Time 1. Terminology: Daylight saving time, not “savings”. 2. Bottling daylight most of the year. In the United States, we spend about 65% of the year (~238 days) in daylight saving time. 3. Two states do not observe DST: Hawaii and Arizona, except for the Navajo … Read more
Disasters can strike anybody at anytime, resulting in catastrophic property damage and loss. Fires in dwellings and natural disasters such as floods, hurricanes, tornadoes, severe storms, mudslides, and wildfires cause significant property damage every year across the United States. Although disasters usually strike without warning, there are measures you can take both before and after … Read more
Many of you may have been awakened by the Tornado Warning in western Dallas/eastern Tarrant Counties early Sunday morning. The tornado sirens sounded across the warned area, and even in my area near the Grapevine/Southlake border. Fortunately the tornado in Irving dissipated as it moved north-northwest toward the residential areas of Carrollton. As it turns … Read more
Since the 1940s, the annual number of fatalities from lightning has been decreasing. In 1940, lightning was the #1 weather-related killer. In 2015, lightning was in last place. How many people were killed by lightning in 2015? Answer: Approximately 27 people were killed by lightning in 2015, according to NOAA records. This represents a 91% … Read more
From May 21st to May 26th, 2011, destructive tornadoes tore through the Great Plains, impacting thousands of people and leaving billions of dollars in damage in its wake. During this time period, there were 241 total tornadoes, including two EF-5, three EF-4, eight EF-3, thirty-one EF-2, eighty-six EF-1, and one hundred [and] ten EF-0 tornadoes. … Read more
The autumnal equinox occurs Wednesday morning at 3:20 am CDT, but the days and nights are not considered equal until Saturday, September 26th. This is because of the atmospheric refraction of sunlight. When a wave encounters a medium whose density differs from that through which the wave has been propagating, conservation of momentum and energy … Read more
Currently at Atlanta’s Hartsfield (ATL) The temperature is: ATL’s heat index is: °F Current Conditions Around Georgia How many days until fall? The summertime heat in the Southeast can be oppressive, despite the fact that actual air temperatures are relatively mild compared to those of the Great Plains and Midwest. For example, the average high … Read more
Definition of Heat Index: The heat index is an estimate of how hot the air “feels” to the human body and provides a relative indication of potential health risks. Among others, the two primary factors in the heat index equations are temperature and water vapor (i.e., moisture/humidity). Humidity affects the efficacy of perspiration to evaporatively … Read more
Currently at Dallas/Fort Worth (DFW) The temperature is: DFW’s heat index is: °F Current Conditions Around N. TX How many days until fall? It’s pretty much a given that summertime in North Texas will be hot. However, there is a fine line between “hot” and dangerously hot. In other words, “only” a few degrees can … Read more
Atlanta’s biggest snowfall events of all time are listed in the table below. The most snow ever recorded on a single day in Atlanta was on January 23, 1940 when 8.3 inches fell. The top 10 snowstorms in Atlanta have a median accumulation of 4.2 inches. View the full list We often hear the cliche: … Read more
A strong mid-latitude cyclone over the southern U.S. resulted in widespread flash flooding from August 10th-14th, where rainfall totals were in excess of 30.00″ (inches) in some areas. Catastrophic flooding occurred across the Deep South, where over 1,000 motorists were stranded on Interstate 12 in eastern Louisiana. Since the flooding, everyone stranded on the interstate … Read more
2019 Spring Equinox Wednesday, March 20 at 5:59 pm EDT Duration of Spring 2019: 92 days, 17 hours, 55 minutes So how many days are left until Spring? Spring 2019 Begins In Related: How many days until summer? Number of days until fall 2019?