Friday Storms - NBC Connecticut
On Ryan's Radar

On Ryan's Radar

First Alert Meteorologist Ryan Hanrahan Gives You His Take on Connecticut's Weather

Friday Storms

On Ryan's Radar

NBC Connecticut First Alert meteorologist Ryan Hanrahan gives you the science behind the forecast and shares with you an in-depth look at the weather impacting Connecticut.

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Forecast for Sunday October 20

A complex storm will approach Connecticut Friday and there is a low risk for a severe thunderstorm tomorrow. A warm front will slowly ooze across Connecticut during the day with a risk for occasional showers and thunderstorms.

Nightly Weather Forecast for August 17Nightly Weather Forecast for August 17

(Published Thursday, Aug. 17, 2017)

  • Any thunderstorms will be isolated - not every town gets one!
  • Several rounds of showers and storms are possible during the morning, midday, and afternoon. 
  • The atmosphere will feature low instability and high wind shear. There is a conditional threat for a rotating storm that could produce a tornado or damaging winds. 

We call these setups low CAPE/high shear. Basically there isn't a whole lot of energy for storms to form but any storms that do will have enough wind shear to work with that they can rotate. Not all rotating storms produce tornadoes - far from it in fact. But as a storm begins to rotate the odds of it producing severe weather increase.

Convective Available Potential Energy (CAPE) valid at 5 p.m. Friday on the GFS model. There isn't much instability or CAPE here but it would be adequate for a few storms to form.

Storm Relative Helicity off the GFS model valid 5 p.m. Friday. Notice locally higher values over Connecticut near a warm front that is moving through. This indicates low level wind shear that can promote rotating storms.

At this point we're giving this a general "low" impact for storms as anything we get would be isolated. We'll be watching it all day for you!