4WARN Weather Alert Wednesday

March will come in like a lion tomorrow.  All the ingredients are coming together for strong to severe thunderstorms to develop.  There is a warm moist air mass in place…today’s high reached 67 degrees and dew points are in the low 60s. An approaching front will add some lift.

The first round of storms is moving now into West Tennessee.  A Tornado Watch has been issued until 4AM for this first round of storms. This will mainly affect western Kentucky and western Middle Tennessee. Damaging wind is the greatest threat, however isolated tornadoes are possible as well as hail.

wsmv-tornado-watches

The main front will come in later in the morning moving across from west to east. The Storm Prediction Center has put most of Middle Tennessee in an Enhanced Risk zone Wednesday.  That is a 3 on a scale of 1 to 5.

lisa-severe-risk-region

Here is the latest timing from Futurecast. Most of the first round goes north into Kentucky.  The second round sweeps quickly across the midstate.

Right now the storm should be in Nashville in a window from 9am to 12noon.

lisa-what-to-expect-severe

Late in the afternoon tomorrow the winds change to the northwest. Cool air will flood in behind the front…morning lows will drop to the 30s, even below freezing Saturday morning. The afternoon highs will be in the 50s.  Expect a lot of sunshine.  The weekend looks fantastic with highs in the 60s.

wsmv-4-plus-4-pm

The 4WARN Weather Team will be here to keep you updated with 4WARN Live Doppler Radar, the only station in Middle Tennessee will real time radar.  Because we can run our radar on the lowest level the image is constantly updating.  You don’t have to wait 5 to 6 minutes for the National Weather Service radar to generate a new image.

To explain more in depth, the diagram below, the red line is the 4WARN Radar. It is constantly going around 360 degrees at the same level.  The NWS radar makes several tilts up, rotating on each tilt.  That gives valuable information about the storm, but it takes time. Channel 4 gives you the best of both worlds, with the 4WARN Real Time Radar and 6 National Weather Service Radars.

LS_DOPPLER_RADAR.png

It’s the 4WARN Advantage. OK, I know that’s a lot of promotion, but I just wanted to explain why we think having our own radar is so important.

I’ll have an update at 10pm.

Lisa Spencer

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About Lisa Spencer

Lisa Spencer is the chief meteorologist at WSMV Channel 4 Nashville. You can catch her weathercasts weekdays at 5pm, 6pm and 10pm.
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One Response to 4WARN Weather Alert Wednesday

  1. Fred says:

    Quite a month and a season we just wrapped up. Some highlights: it was the second-warmest February, warmest since 1882 (!). Driest since 1980 (the drought is back, as we had the 12th driest Jan.-Feb. period). Second-most days with 70+ readings (9), just one less than February 1976, but the highest average daily maximum ever (62.3, which would be warm even for March). First time in 25 years that no snow fell (not even a trace) and just the 5th time overall (other instances being 1992, 1949, 1932 and 1887). We also had the second-warmest January – February period, just a shade less than the record set 127 years ago. As far as the calendar winter goes, it was tied for the 4th-warmest with 1881-82 season, and was the warmest winter since 1931-32. All of this means that our streak of above-average months now stands at the unprecedented 13 in a row. Out of the last 18 months, 17 were above normal in temperature. Of those 17 months, 15 were at least 2 degrees warmer than average, which is simply staggering. Over the last year and a half only January and May of 2016 were essentially normal, with the former slightly cooler and the latter slightly warmer than the norm. August 2015 was the last unequivocally cool month observed in Nashville. Yes, it’s been a (really long) while.

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