Marginal Risk Severe Weather Long Island

Marginal Risk Severe Weather Long Island

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Marginal Risk Severe Weather Long Island

Marine Layer Again Is Key

Once again Long Island seems to be on the edge of a severe weather threat this afternoon but already this morning we can see a few things working against this. First is the fact that all the strong dynamics seem to be to the north of Long Island. The second thing is that the marine layer and warm front have not cleared the area yet.

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
FARMINGDALE    CLOUDY    78  75  90 S13       29.93F
ISLIP          CLOUDY    76  73  91 S12       29.93F
SHIRLEY        LGT RAIN  76  73  91 S10       29.95F
RIVERHEAD        N/A     77  73  88 SW2       29.93F
WESTHAMPTON    CLOUDY    76  71  85 S13G20    29.96F
SOUTHAMPTON      N/A     73  72  94 S10       29.92S
BRIDGEHAMPTON    N/A     75  72  88 S5        29.82S
EAST HAMPTON   LGT RAIN  72  70  93 S6        29.96S
MONTAUK POINT    N/A     75  70  84 S7        29.98S

Looking at the temperatures and wind this morning the marine layer is here and the winds have not shifted to the southwest. Nor have the low clouds burned off to allow for some daytime heating. This is an ongoing problem. Usually this time of year the ocean is warm enough to be less destructive to thunderstorms but the pattern we are in seems to be preventing this. Sunshine is breaking through the clouds to the west where temperatures are climbing into the 80s. Daytime heating will be supportive there.

Latest radar loops are beginning to pick up on some showers developing in West Central Pennsylvanai and they seem to be moving eastward. The southern end of that line will be overhead so how that develops will also be important to what happens here later this afternoon.

Marginal Risk Severe Weather Long Island Radar Loops

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The latest HRRR model forecast has Long Island on that southern end of the thunderstorm line which is much more active to the north and northeast through New England where the strongest dynamics exist for severe thunderstorms.

Marginal Risk Severe Weather Long Island HRRR Model Forecast

hrrr12 Marginal Risk Severe Weather Long Island

So at least for the rest of this morning into this afternoon we will see some breaks of sunshine through the clouds. Temperatures will climb into the 80s. Then we sit back and wait to see whether these thunderstorms hold together or not. Both the HRRR model and the NAM model take any thunderstorms and weaken them before they make it into Suffolk County.

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