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Dr. Tim Coleman
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...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 5 AM CDT... A line of intense thunderstorms is about to cross the Alabama/Mississippi line. These storms are producing quite a bit of lightning, as well as heavy rain, gusty winds, and mainly small hail. There were a lot of reports of large hail... Continue reading
Posted 2 days ago at WBRC First Alert Weather
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There has been some talk about big thunderstorms this weekend. A cold front will move through here Saturday night, and we will probably see a line of thunderstorms along it as it moves in. But, a widespread outbreak of severe weather is not likely. There are already some storms forming... Continue reading
Posted 7 days ago at WBRC First Alert Weather
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Quickly an update...there is a thermal boundary located in east Alabama. That is likely causing enhanced wind shear and causing rotation and more intense storms in that region, including the one near Heflin and the one near Weiss Lake. That area will have the greatest threat for severe weather in... Continue reading
Posted Apr 5, 2017 at WBRC First Alert Weather
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...TORNADO WATCH UNTIL 9 PM... The air is very unstable over the Birmingham area and eastward into Anniston and Gadsden, with dewpoints (shown above) near 70 degrees. The CAPE is near 3,000 J/kg, so thunderstorms can grow very quickly in this environment. The wind shift line, or "dryline", is located... Continue reading
Posted Apr 5, 2017 at WBRC First Alert Weather
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Most of the thunderstorms, including a tornado warning in the Atlanta suburbs, continue to our south and east. But, SPC is also concerned about the boundary moving in from the west, and they are probably going to issue a tornado watch for north and central Alabama, roughly from I-20 north,... Continue reading
Posted Apr 5, 2017 at WBRC First Alert Weather
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A severe thunderstorm has been producing at least small hail over Shelby County, and will move into St. Clair and Talladega counties soon. Besides that one plus a few small storms near Jacksonville, most of the storms are now in southeast Alabama and Georgia. The forecast was already difficult today,... Continue reading
Posted Apr 5, 2017 at WBRC First Alert Weather
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...TORNADO WATCH IN EFFECT... Things are going mainly as expected so far this morning, with the warm front moving rapidly northward overnight due to strong southerly winds. Elevated thunderstorms formed to the north of the front and have been producing heavy rain and intense lightning for hours this morning, mainly... Continue reading
Posted Apr 5, 2017 at WBRC First Alert Weather
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It is a pleasant night over Alabama, and over our area, dewpoints are still in the 50s, indicating fairly dry air. But notice the high dewpoints along the Gulf Coast, many in the lower 70s. As the upper-level system takes shape to our west, southerly winds are already picking up,... Continue reading
Posted Apr 4, 2017 at WBRC First Alert Weather
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It has been an active weather pattern for the past 2 weeks or so, with 4 big storms affecting Alabama. So far, we have already gotten 5.5" of rain in this active weather pattern, and more is coming with the next one, and it should be the last for a... Continue reading
Posted Apr 4, 2017 at WBRC First Alert Weather
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An area of low pressure that sometimes forms near the back edge of the rain in a large thunderstorm complex is called a wake low. It forms due to descending air warming aloft, reducing its weight, and lowering the pressure at the surface. Air sometimes rushes into this low and... Continue reading
Posted Apr 3, 2017 at WBRC First Alert Weather
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The weather system that produced tornadoes in Louisiana yesterday and severe storms even into south Mississippi, south Alabama, and now south Georgia, produced a massive area of heavy rain with embedded, mainly non-severe, thunderstorms over north and central Alabama overnight and this morning. This was good in that the rain... Continue reading
Posted Apr 3, 2017 at WBRC First Alert Weather
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Intense thunderstorms over Louisiana caused multiple tornadoes on Sunday, resulting in at least two fatalities. However, the storms have been "training", over moving over the same areas over and over again for a while now, lessening the severe weather threat. As the upper-level system swings through, the main line of... Continue reading
Posted Apr 2, 2017 at WBRC First Alert Weather
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A massive area of storms has been moving slowly along the Gulf Coast today, as we suspected was possible. This has helped to choke off the northward flow of moisture into central Alabama. The storms to our south are moving NE, and will affect Birmingham metro, Tuscaloosa, and Anniston over... Continue reading
Posted Mar 30, 2017 at WBRC First Alert Weather
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We saw heavy rain and storms on Saturday, then a big line of storms Monday night that knocked down some trees, and caused some hail. Most of us have seen around 3" of rain since Friday night. We are in a very active weather pattern, and another round of storms... Continue reading
Posted Mar 29, 2017 at WBRC First Alert Weather
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...SEVERE THUNDERSTORM WATCH UNTIL 9 PM CDT... The active weather pattern continues, as an upper-level shortwave trough will pass by to our north over the next 24 hours. SPC has placed much of central Alabama in a slight risk for severe weather, and parts of north Alabama in an enhanced... Continue reading
Posted Mar 27, 2017 at WBRC First Alert Weather
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An upper-level low pressure area is centered over the Great Plains today, and will shift northeast tomorrow. This will bring moist low-level air into Alabama from the south during the day tomorrow. This, combined with cold air aloft, will cause the atmosphere to be unstable tomorrow afternoon and tomorrow evening... Continue reading
Posted Mar 24, 2017 at WBRC First Alert Weather
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(UAH MAX mobile radar and M3V mobile weather measurements vehicle) VORTEX-SE (Southeast) is the third part of a project started years ago in the Great Plains. It stands for Verification of the Origins of Rotation in Tornadoes EXperiment, and had two big projects in the Great Plains. But, the lay... Continue reading
Posted Mar 21, 2017 at WBRC First Alert Weather
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Spring officially begins next week, but we areally getting close to the equinox, and the days have gotten a lot longer and the sun angle higher. The chart above shows the path of the sun across the sky from sunrise in the ESE to sunset in the WSW. It's almost... Continue reading
Posted Mar 17, 2017 at WBRC First Alert Weather
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Here on the anniversary of the Blizzard of 1993, it is a cold and dreary day across Alabama, with cloudy skies, rain, and temperatures at 2 pm only in the 40s. With dense cloud cover and more rain on the way later today, we will probably not get out of... Continue reading
Posted Mar 13, 2017 at WBRC First Alert Weather
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...SEVERE THUNDERSTORM WARNING JEFFERSON AND SHELBY COUNTIES... A wave has developed in the line of storms approaching central Alabama, indicating some rotation and the potential for damaging winds. This line echo wave pattern (LEWP) is just west of Bessemer and approaching downtown Birmingham, Hoover, and threatens almost all of Jefferson... Continue reading
Posted Mar 7, 2017 at WBRC First Alert Weather
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A line of intense thunderstorms extends from Cullman to Fayette to Aliceville, and it is moving east quickly. Most of these storms are generally not technically severe, but there is a Severe Thunderstorm Warning for the bow echo, or swirl in the line indicating high winds, for Pickens and Tuscaloosa... Continue reading
Posted Mar 7, 2017 at WBRC First Alert Weather
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The main line of thunderstorms is moving into BHM and TCL metro now. The NWS issued a severe thunderstorm warning for northeast Jefferson County, for the possibility of hail and damaging winds in places like Gardendale, Center Point, Pinson, and Trussville. Additional intense storms are moving through northern Tuscaloosa County,... Continue reading
Posted Mar 1, 2017 at WBRC First Alert Weather
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...TORNADO WATCH IN EFFECT UNTIL 6 PM CST... The line of thunderstorms is already moving through northern Alabama this afternoon. The air is marginally unstable, but enough to support strong updrafts, especially in the Tennessee Valley where upper-level temperatures are colder. Numerous reports of large hail, several as big as... Continue reading
Posted Mar 1, 2017 at WBRC First Alert Weather
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A strong weather system, with an upper-level trough and associated low pressure area, is moving across the U.S. tonight. Warm, moist air has moved as far north as Michigan, and tornadoes have been reported in parts of Illinois and Missouri tonight, with at least two fatalities. In addition, a 95... Continue reading
Posted Feb 28, 2017 at WBRC First Alert Weather
Birmingham reached 72 degrees at 2 pm, making it the 23rd day this meteorological winter (Dec, Jan, and Feb) that we have reached 70 or higher. That ties us for 2nd most all time. With three more by next Tuesday we will tie the record set in 1957. We will... Continue reading
Posted Feb 23, 2017 at WBRC First Alert Weather