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Dr. Tim Coleman
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The cold air is coming in today! Strong northwest winds are blowing. If we go NW from Birmingham, we see a temperature of 51 here, 47 in Tupelo, 45 in Memphis, and 34 in Springfield, MO. That air is headed our way. During the day tomorrow, with cloudy skies, we... Continue reading
Posted 9 hours ago at WBRC Weather
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The above chart shows temperatures at 6 am CST this morning over North America. 30s here in Alabama, colder out in the Rocky Mountains. But look up north. A mass of very cold air has developed again over Canada, with a large area of temperatures below -20 F (the white... Continue reading
Posted 4 days ago at WBRC Weather
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Scattered showers and thunderstorms are developing over Mississippi and Alabama this afternoon in the warm, moist air mass. However, over Alabama, these storms are having a hard time becoming very large due to the warm air aloft we talked about yesterday. It is shown on the balloon data from Shelby... Continue reading
Posted 6 days ago at WBRC Weather
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The big swirl on satellite in the southwestern U.S. is a large storm system that will move across the United States over the next 2 days. The upper-level trough will cause a surface low pressure area to form and move through the central Plains and into the Great Lakes by... Continue reading
Posted 7 days ago at WBRC Weather
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A small area of rain, perhaps mixed with a little sleet and snow, will rotate through the Birmingham Metro area over the next hour. Temperatures are still above freezing (41 and dropping), and there should be no widespread travel problems with this area of precipitation, except perhaps at high elevations... Continue reading
Posted Jan 22, 2016 at WBRC Weather
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The heavy rain is moving out of central Alabama this morning. We now turn our attention to the western side of this large weather system, where a deformation zone (area where air gets stretched) has developed and, along with moisture wrapping around the system, is producing heavy snow in Arkansas,... Continue reading
Posted Jan 22, 2016 at WBRC Weather
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We are in a cold, active weather pattern. And, unfortunately, a closed upper-level low (the circle that forms in the 500 mb flow on Friday) will be involved, making the forecast difficult. We often say, "Upper level low, weatherman's woe." Temperatures will slowly warm up through tomorrow with occasional light... Continue reading
Posted Jan 20, 2016 at WBRC Weather
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It's been a cold week here in Alabama, with low temperatures Monday morning dropping into the teens over north Alabama, including 19 in Birmingham, with freezing temperatures all the way to the Gulf Coast. It has stayed cold this week, but temperatures will briefly moderate this afternoon into tomorrow and... Continue reading
Posted Jan 14, 2016 at WBRC Weather
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Above is a map with current weather across the central U.S., including temperatures (in red). Note it is 55 here in BHM, and even 52 in Paducah, KY. But then you cross the cold front. It is 34 in St Louis, 8 in Des Moines, Iowa, and below zero in... Continue reading
Posted Jan 9, 2016 at WBRC Weather
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Among the bad things that happened on the night of December 25, with two tornadoes and flooding, I have an amazing story to tell you. 8:59 pm Friday Extreme rain had occurred and was continuing across north-central Alabama, north of a thermal boundary. Some locations in Blount, Cullman, Walker, and... Continue reading
Posted Dec 29, 2015 at WBRC Weather
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The band of storms we have been discussing since about 730 pm has intensified somewhat. Two storms are of concern. One is about to enter Pickens County, and the other is further SW near Meridian, MS. These storms are showing some characteristics of becoming independent, and they are rotating. The... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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As the big storms that produced large tornadoes in Mississippi earlier (including 2 fatalities in Ashland, MS) move north into extreme NW AL and middle TN, the air continues to slowly destabilize over central Alabama. A narrow band of showers and maybe a few thunderstorms has formed out ahead of... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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Numerous tornadoes have touched down in northern Mississippi today, causing damage and injuries. However, the line of storms containing these has weakened somewhat since it got dark. These storms are approaching extreme NW Alabama now, and may affect Florence within 30 minutes. The storms farther south that would affect Marion,... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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It's a stormy day across the Birmingham area, and the heavy rain with thunderstorms is probably a good thing. It has kept temperatures cool, and kept us cloudy. Temperatures are still around 64 degrees or lower in Birmingham, so the air is still stable at the surface, only supporting elevated... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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SPC has gone ahead with a tornado watch over northern MS and western TN, and it is a PDS, or "particularly dangerous situation" tornado watch, indicating the possibility of long-track, damaging tornadoes. See the blog below for details on the threat here in Alabama. Dr. Tim Coleman Twitter @timbhm Continue reading
Posted Dec 23, 2015 at WBRC Weather
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Here we go. The large rain area that has kept Alabama's atmosphere nice and stable this morning will move out to the northeast over the next 2 or 3 hours. The thing that has concerned me since last night was the possibility of a little sunshine warming up the surface... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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It's almost time to start looking out the window more than we look at computer models. But, not completely. Things are coming together for a severe weather outbreak in the southeast. It still looks like the main threat will be to our north and west, but there is a risk... Continue reading
Posted Dec 23, 2015 at WBRC Weather
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We are still dealing with a difficult system to forecast, but it looks more aggressive now than it did yesterday. The parameters (instability and wind shear) look like they will be sufficient by tomorrow night, and maybe even as early as tomorrow afternoon, for severe thunderstorms and possible tornadoes here... Continue reading
Posted Dec 22, 2015 at WBRC Weather
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The weather pattern has changed quickly over the U.S., with the cold air mass from this past weekend being replaced by warm moist air out of the Gulf of Mexico. It was 31 degrees early this morning at Birmingham, but with a little sunshine early temperatures made it into the... Continue reading
Posted Dec 21, 2015 at WBRC Weather
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It's windy again today, with winds gusting up to 15 to 25 mph. But, it's nothing like last night. The strongest wind we had was not associated with thunderstorms (did you hear any thunder last night at all?), but instead with the large pressure gradient ahead of the approaching cold... Continue reading
Posted Dec 14, 2015 at WBRC Weather
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There has been a lot of talk about a possible severe weather event Sunday night. Right now, it looks like tomorrow will be a windy day, and we will get a line of rain with some thunderstorms tomorrow night or early Monday morning, but the risk of any severe weather... Continue reading
Posted Dec 12, 2015 at WBRC Weather
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Initial analysis shows that Hurrricane Patricia was the strongest hurricane ever in the area of responsibility of the National Hurricane Center, including the eastern Pacific, Atlantic, Caribbean, and Gulf of Mexico. At least it reached its peak intensity out over the ocean, and came inland in a relatively unpopulated area.... Continue reading
Posted Oct 26, 2015 at WBRC Weather
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The remnant low pressure area left over by Hurricane Patricia is now near the Gulf Coast, centered just southwest of New Orleans, and continues to bring a large area of rain into Alabama. Look at the circulation in wind flow around the giant low pressure area. It started raining in... Continue reading
Posted Oct 26, 2015 at WBRC Weather
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Summer is definitely over now. It got cold across Alabama this morning, even colder than we thought it would because the wind calmed down. A few lows included 41 at BHM, 39 at Anniston, 45 at Tuscaloosa, 42 in Jasper, 40 in Clanton, and 33 in Cullman. There were some... Continue reading
Posted Oct 17, 2015 at WBRC Weather
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Temperatures have already cooled down relative to yesterday, with noon readings only in the mid 70s. The winds are now out of the north and gusty over north and central Alabama, and the cold front is near Montgomery. Temperatures will really start to drop overnight, as the cold air mass... Continue reading
Posted Oct 16, 2015 at WBRC Weather