Severe Storm Risk - Littleton, MA

There is a Slight Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF WESTERN NORTH TEXAS...THE SOUTHEAST AND CAROLINAS...INTO NEW ENGLAND SUMMARY Isolated to scattered severe thunderstorms remain likely from Kentucky and the central Appalachians to the Mid-Atlantic, with primarily damaging wind gusts or marginal hail. Scattered severe storms are possible from upstate New York into New England, with damaging wind gusts and tornado potential. A few tornadoes may also occur over parts of the middle Gulf Coast and southeast states, and scattered storms may produce damaging winds or marginal hail from Oklahoma into western North Texas. 20z Update TX/OK Forecast confidence has increased late this afternoon into tonight that one or more semi-organized clusters of thunderstorms will develop and spread southeastward across parts of western North TX with a risk for damaging gusts. Strong convergence near an anomalously deep surface low and sagging cold front will support numerous thunderstorms tonight. Despite marginal deep-layer shear for organization, a hot and very unstable air mass in vicinity of the surface low will allow for strong cold pool development, potentially supporting severe outflow gusts. More isolated damaging gusts and/or marginally severe hail remain possible farther north into OK. Have upgraded wind probabilities to 15% and a categorical Level 2 Slight Risk for portions of western North TX. Southeast Convection associated with the remnants of Arthur will persist through tonight along a stalled frontal zone in the Southeast. While clustering has resulted in more linear structures, enhanced flow aloft and pockets of stronger low-level shear near the front may still support occasional rotating updrafts, with the risk for a couple of tornadoes or damaging gusts from eastern AL, into GA and the western Carolinas through tonight. Have reduced maximum tornado probabilities, but will maintain a broad 5% for occasional supercell structures along/near the front. New England The broken band of storms ahead of the cold front should continue eastward and gradually weaken into this evening. Southern portions of the line over MA, CT and RI may remain stronger given better buoyancy, but storm coverage here should become more isolated with time. Damaging gusts and perhaps a tornado or two remain possible. Have trimmed probabilities behind the cold front where the risk has decreased. No other changes were made, see the previous discussion for more information.