ZCZC NFDSPENES ALL
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MEZ000-MAZ000-NHZ000-RIZ000-VTZ000-CTZ000-NYZ000-
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SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/29/08 0130Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-EAST:0115Z  SSMI:2231Z  AMSU:2016-2157Z  JS
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LOCATION...MAINE...MASSACHUSETTS...NEW HAMPSHIRE...RHODE ISLAND...
LOCATION...VERMONT...CONNECTICUT...NEW YORK...
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ATTN WFOS...CAR...GYX...BOX...BTV...OKX...ALY...
ATTN RFCS...NERFC...
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EVENT...INCREASING DIVERGENT FLOW WITH COOLING TOPS NOTED ACROSS MID
ATLANTIC/NORTHEAST.
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SATELLITE ANALYSIS AND TRENDS...EXPERIMENTAL SATELLITE DIVERGENCE
ALGORITHM CONFIRMS TRENDS SEEN RECENTLY IN WATER VAPOR AND IR LOOPS
WITH INCREASING LARGER SCALE LIFT TAKING SHAPE ACROSS EASTERN PORTION
OF MIDDLE ATLANTIC REGION EXTENDING INTO THE NORTHEAST. WHILE UPPER
LEVEL FLOW WITHIN SUBTROPICAL STREAM IS STREAKING NORTHEASTWARD ACROSS
THE CAROLINAS TO SOUTHEAST VIRGINIA, THE FLOW ON THE BACKSIDE OF THE
BAROCLINIC ZONE HAS BECOME MORE SOUTHERLY FROM WESTERN VIRGINIA TO
WESTERN NEW YORK IN RESPONSE TO VIGOROUS UPPER DISTURBANCE MOVING SE
ACROSS INDIANA. THE RESULT HAS BEEN COOLING CLOUD TOPS AND A GENERAL
LOWERING OF SFC PRESSURES ALONG AND OFF THE EAST COAST. MICROWAVE DATA
FROM A FEW HOURS AGO SHOWS PW VALUES WITHIN BAROCLINIC ZONE JUST OFF
THE EAST COAST ARE RUNNING MAINLY BETWEEN 1.4"-1.6" WHICH AGREES WITH
A COUPLE OF 00Z RAOBS FROM THE COASTAL NORTHEAST. MODEL FORECAST WIND
FLOW AND REGIONAL VWP FROM LONG ISLAND/SE MA/S MAINE INDICATE GENERALLY
40-50KTS OF SSW TO SOUTHERLY 850MB FLOW WHICH IS DIRECTED PARALLEL TO
MOISTURE PLUME. THESE WINDS MAY EVEN INCREASE A BIT MORE LATER TONIGHT
AS LOW PRESSURE DEVELOPS FURTHER. CURRENTLY A LARGE SHIELD OF LIGHT
TO MODERATE RAIN COVERS THE NORTHEAST WITH A FEW POCKETS OF HEAVIER
RAIN WHICH APPEAR TO HAVE FOCUSED A BIT MORE OVER PORTIONS OF CT/RI
IN THE CONVERGENT ZONE JUST NORTH OF THE APPROACHING WARM FRONT AS PER
RECENT 12 PLANET INFO FROM TAUNTON. UPSTREAM FROM THERE RADAR COMPOSITE
REFLECTIVITY DATA SHOWS ADDITIONAL HEAVIER ELEMENTS OFFSHORE SOUTH OF
LONG ISLAND WITH EVEN MORE ACTIVITY ACROSS SE VA/E NC AND OFFSHORE
WITH ANOTHER WAVE FORMING ALONG BOUNDARY THERE. EXPECT RAIN SHIELD
WITHIN PRIMARY BAROCLINIC ZONE ALONG MID ATLANTIC REGION TO GET A SHOVE
EASTWARD AS UPPER DISTURBANCE AND ASSOCIATED DRY SLOT/SURGE APPROACHES
FROM THE OHIO VALLEY. HOWEVER WITH UPPER LOW AND ASSOCIATED BLOCKING IN
PLACE ACROSS NORTHERN ATLANTIC/EXTREME SE MARITIME CANADA AS PER WATER
VAPOR LOOP, EXPECT FLOW BETWEEN THESE SYSTEMS AIMED AT THE NORTHEAST TO
BECOME MORE NEGATIVELY TILTED OVERNIGHT RESULTING IN A MORE EXTENDED
PERIOD OF MODERATE TO HEAVY RAIN ESPECIALLY FOR SPOTS ROUGHLY FROM E
LONG ISLAND ACROSS THE EASTERN HALF OF MASSACHUSETTS TO NEW HAMPSHIRE
AND SOUTHERN MAINE.
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SEE NCEP HPC DISCUSSION AND QPF/S FOR FORECAST.
....NESDIS IS A MEMBER OF 12 PLANET....
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SSD/SAB WEB ADDRESS FOR PRECIP ESTIMATES:
HTTP://WWW.SSD.NOAA.GOV/PS/PCPN/
...ALL LOWER CASE EXCEPT /PS/PCPN/
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LAT...LON 4776 7181 4741 6725 4042 6862 4043 7313
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