197  
FGUS71 KBOX 131751  
ESFBOX  
CTC003-013-015-MAC001-005-007-009-011-013-015-017-019-021-023-025-  
027-RIC001-003-005-007-009-151800-  
 
WINTER/SPRING FLOOD POTENTIAL OUTLOOK  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
151 PM EDT FRI APR 13 2018  
   
..SPRING FLOOD POTENTIAL IS NEAR NORMAL
 
 
 
THE SPRING FLOOD POTENTIAL IS NEAR NORMAL ACROSS SOUTHERN NEW ENGLAND.  
THE FLOOD THREAT FROM ICE JAMS IS OVER FOR THE SEASON.  
 
THE FOLLOWING WEB SITE HAS A MAP DEPICTING THE FRESHWATER FLOOD  
POTENTIAL OUTLOOK...  
HTTP://WWW.WEATHER.GOV/NERFC/SPRINGFLOODPOTENTIAL.  
 
THIS IS THE NINTH WINTER/SPRING FLOOD POTENTIAL OUTLOOK OF THE 2018  
SEASON. THIS OUTLOOK IS BASED ON CURRENT AND FORECAST  
HYDROMETEOROLOGICAL CONDITIONS. THIS INCLUDES SNOW COVER AND SNOW  
WATER EQUIVALENT, STREAM AND RIVER LEVELS AND THE AMOUNT OF ICE  
COVERAGE, RECENT PRECIPITATION AND TEMPERATURES, AND EXPECTED  
TEMPERATURES AND PRECIPITATION OVER THE NEXT TWO WEEKS.  
   
..RECENT PRECIPITATION AND TEMPERATURES
 
 
THE PAST 2 WEEKS, FROM MARCH 30 THRU APRIL 12, BROUGHT BELOW NORMAL  
PRECIPITATION TO THE AREA. LIQUID EQUIVALENT PRECIPITATION RANGED  
FROM 1 TO 1.75 INCHES. THIS PRECIPITATION WAS 0.5 TO 1.5 INCHES  
BELOW NORMAL. TEMPERATURES AVERAGED 2 TO 4 DEGREES BELOW NORMAL  
ALONG EASTERN MA AND SOUTHERN RI, AND 4 TO 6 DEGREES BELOW NORMAL  
ACROSS THE REMAINDER OF SOUTHERN NEW ENGLAND.  
   
..OBSERVED SNOW DEPTHS AND WATER EQUIVALENTS
 
 
 
SNOW DEPTH WAS ZERO ACROSS THE VAST MAJORITY OF SOUTHERN NEW  
ENGLAND. THE EXCEPTION WAS ACROSS SOME OF THE HIGHEST TERRAIN OF THE  
EAST SLOPES OF THE BERKSHIRES, WHERE A PATCHY SNOW PACK OF UP TO A  
FEW INCHES IN DEPTH WAS REPORTED. WATER EQUIVALENT WAS UP TO AN  
INCH. THIS WAS NEAR NORMAL FOR MID APRIL.  
 
THERE WAS STILL SOME SNOW PACK THAT REMAINED ACROSS THE HEADWATERS  
OF THE CONNECTICUT RIVER, WITH WATER EQUIVALENT OF UP TO A FEW  
INCHES. THIS WAS ACROSS THE HIGHER TERRAIN OF VERMONT AND  
NORTHERN NEW HAMPSHIRE. THIS IS NORMAL FOR MID APRIL.  
   
..RIVER AND ICE CONDITIONS
 
 
 
RIVERS AND STREAMS WERE RUNNING NORMAL TO BELOW NORMAL ACROSS THE  
REGION.  
 
RIVER ICE WAS NO LONGER A CONCERN FOR THIS SEASON, AND THE FLOOD  
THREAT DUE TO ICE JAMS IS OVER FOR THE SEASON.  
   
..SOIL MOISTURE CONDITIONS
 
 
 
SOIL MOISTURE WAS NEAR NORMAL FOR THIS TIME OF YEAR. THE GROUND WAS  
THAWED.  
   
..TEMPERATURE AND PRECIPITATION OUTLOOK
 
 
THE OVERALL WEATHER PATTERN IS EXPECTED TO BE ACTIVE. SPOT SHOWERS  
ARE POSSIBLE TODAY WITH A BRIEF PERIOD OF WARMTH. A BACK DOOR  
COLD FRONT WILL PUSH THROUGH THE AREA DURING SATURDAY, BRINGING AN  
END TO THAT WARMTH AS TEMPERATURES FALL DOWN INTO THE 40S.  
SHOWERS AND DRIZZLE WILL OCCUR BEHIND THE FRONT. SUNDAY WILL BE  
VERY CHILLY, WITH RAIN LIKELY AND EVEN THE POSSIBILITY OF SOME  
WINTRY PRECIPITATION. A STRONG FRONTAL SYSTEM WILL BRING RAIN,  
POSSIBLY LOCALLY HEAVY AT TIMES, DURING MONDAY. NEAR NORMAL  
TEMPERATURES ARE THEN EXPECTED THRU THE REMAINDER OF THE WORKWEEK,  
WITH SOME ADDITIONAL CHANCES FOR RAIN.  
 
THE WEEK 2 OUTLOOK FROM THE CLIMATE PREDICTION CENTER, FOR APRIL 20-  
26, CALLS FOR BELOW NORMAL TEMPERATURES AND ABOVE NORMAL  
PRECIPITATION.  
   
..SUMMARY
 
 
THE FRESHWATER FLOOD POTENTIAL IS NEAR NORMAL. BELOW NORMAL RAINFALL  
HAS ALLOWED RIVERS AND STREAMS TO REMAIN AT NORMAL TO BELOW NORMAL  
LEVELS. WITH THE EXCEPTION OF FAR NORTHWEST MA, THE GROUND WAS BARE  
OVER SOUTHERN NEW ENGLAND. HOWEVER, A SNOWPACK DID REMAIN IN PLACE  
ACROSS THE HIGHER TERRAIN IN THE CONNECTICUT RIVER HEADWATERS OF  
NORTHERN NEW ENGLAND. SOME MELTING OF THIS SNOWPACK OCCURS TODAY,  
THEN COLDER AIR FOLLOWS WHICH WILL LIMIT MELT DURING THIS  
WEEKEND.  
 
RAINFALL DURING SUNDAY ACROSS WESTERN MA AND CENTRAL CT, AND ACROSS  
THE CONNECTICUT RIVER WATERSHED ON MONDAY, COULD PRODUCE ELEVATED  
LEVELS ON THE LOWER CONNECTICUT RIVER DURING EARLY NEXT WEEK. AT  
THIS TIME FLOODING IS NOT ANTICIPATED, HOWEVER THE LOWER  
CONNECTICUT RIVER COULD REACH ACTION STAGE AT SOME RIVER FORECAST  
POINTS DURING EARLY NEXT WEEK. THOSE WITH INTERESTS ON THE LOWER  
CONNECTICUT RIVER SHOULD MONITOR THE LATEST FORECASTS. IT SHOULD  
BE NOTED THAT SOME MINOR FLOODING ON THE LOWER CONNECTICUT RIVER  
DURING THE SPRING IS NORMAL.  
 
THE FLOOD THREAT DUE TO ICE JAMS IS OVER FOR THE SEASON.  
 
UNLESS CONDITIONS SUBSTANTIALLY CHANGE, THIS WILL BE THE FINAL  
WINTER/SPRING FLOOD OUTLOOK ISSUED BY NWS TAUNTON FOR THE SEASON.  
NOTE THAT NORMAL HYDROLOGIC CONDITIONS FOR APRIL CAN INCLUDE MINOR  
FLOODING OF SOME AREA RIVERS AND STREAMS.  
 
KEEP IN MIND THAT HEAVY RAIN CAN CAUSE FLOODING ANY TIME OF THE  
YEAR. THOSE WITH INTERESTS ALONG RIVERS AND STREAMS SHOULD CHECK THE  
HAZARDOUS WEATHER OUTLOOK, WHICH HIGHLIGHTS ANY POTENTIAL FLOOD  
EVENTS OVER THE NEXT 7 DAYS. GO TO HTTPS://WEATHER.GOV/BOSTON AND  
CLICK ON THE OPTION CURRENT HAZARDS, THEN CLICK ON LOCAL OUTLOOK.  
 

 
 
FOR THE LATEST UPDATES, PLEASE VISIT OUR WEBPAGE AT  
WWW.WEATHER.GOV/BOSTON  
 
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WWW.FACEBOOK.COM/NWSBOSTON  
 
YOU CAN FOLLOW US ON TWITTER AT  
@NWSBOSTON  
 
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