A potent low pressure system in the Ohio Valley during the early morning hours of May 11th moved eastward and gradually weakened. A secondary low formed over northeastern North Carolina during the late afternoon on the 11th and eventually absorbed the other low pressure system, becoming the dominant storm.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PHI wrote it up.
A potent low pressure system in the Ohio Valley during the early morning hours of May 11th moved eastward and gradually weakened. A secondary low formed over northeastern North Carolina during the late afternoon on the 11th and eventually absorbed the other low pressure system, becoming the dominant storm. This storm gradually moved east northeastward late on the 11th into the 12th. Early on the morning of the 12th, the storm was centered over the southern Delmarva. As this storm strengthened fairly rapidly, a strong northeast wind developed and persisted through the evening of the 12th. The prolonged northeast flow combined with heavy rain, caused some areas of flooding. There was limited moisture inland from the center of the storm, however an abundance of moisture wrapped into Eastern Maryland. By the evening of the 12th, the coastal storm tracked eastward and gradually moved away from the region.
Utility companyies reported more than 50,000 customers were without power in Maryland. Delmarva Power reported that crews had to deal with downed wires caused by fallen trees and limbs, and flooding of area roads hampered service restoration efforts. On the 12th, both the elementary and middle schools in Rock Hall (Kent County) were dismissed at 9:30 AM EDT, as power was lost. In the Millington-Massey area (Kent County), power was lost on the 12th for about three hours after a tree was knocked over onto power lines. On the 12th, high water covered Route 19 on the south side of Church Hill (Queen Anne’s County).
Some peak wind gusts included: 47 mph at Ridgely; 45 mph at Easton; and 44 mph at Chesapeake City. Some rainfall totals included: 3.10 inches in Royal Oak; 3.09 inches in St. Michaels; 2.88 inches in Easton; 2.81 inches in Bellevue; 2.64 inches in Stevensville; 2.36 inches in Greensboro; 2.30 inches in Cordova; and 1.80 inches in Federalsburg.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at May 11, 8:25 PM EST, 1 hour 50 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
925 PM EDT SUN MAY 11 2008
.SYNOPSIS...
LOW PRESSURE WAS LOCATED OVER OHIO THIS EVENING WITH A SECONDARY
AREA OF LOW PRESSURE ORGANIZING IN THE VICINITY OF SOUTHEASTERN
VIRGINA. THE SECONDARY LOW WILL STRENGTHEN TONIGHT AND IT SHOULD
ABSORB THE WEAKENING PRIMARY LOW. THE SYSTEM IS THEN FORECAST TO
MOVE TO THE NORTHEAST, TRACKING OFF THE DELMARVA COAST LATE
TONIGHT. THE LOW WILL MOVE SLOWLY OUT TO SEA MONDAY INTO TUESDAY.
HIGH PRESSURE IS THEN EXPECTED TO BUILD IN FROM THE WEST FOR
TUESDAY INTO EARLY THURSDAY. A COLD FRONT IS FORECAST TO PASS
THROUGH OUR REGION ON THURSDAY NIGHT. A WEAK AREA OF HIGH PRESSURE
SHOULD FOLLOW FOR PART OF FRIDAY AND SATURDAY, THEN A COLD FRONT
IS SCHEDULED TO ARRIVE ON SUNDAY.
&&
.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
AN UPPER LEVEL LOW WAS SPINNING ACROSS THE OHIO RIVER VALLEY THIS
EVENING AND BEGINNING TO TRANSPORT SOME ENERGY TO THE SOUTHEAST
OVER THE CAROLINAS.
THE SECONDARY LOW WILL FORM AND MOVE NORTHEAST WITH A COUPLE
DIFFERENT SOLUTIONS. BY FAR THE MOST OMINOUS IS THE SFC TRACK ON
THE NAM. WHEREAS THE GFS IS MORE PROGRESSIVE, THE NAM WANTS TO
TAKE THE LOW OFFSHORE AND THEN HAVE IT RETROGRADE TO CENTRAL
DELAWARE. WITH THE STRONG GRADIENT FROM 925 UP THROUGH 80H, THIS
WOULD BE A VERY FAVORABLE SET UP FOR TIDAL FLOODING. ITS BAD
ENOUGH THAT THIS STORM IS VERY UNCHARACTERISTIC FOR MAY 11TH, BUT
THEN AGAIN IT HAS CAUSED UNTOLD MISERY AND FOR OUR WESTERN AND
SOUTHERN NEIGHBORS.
RAIN HAS REACHED THE WESTERN AND SOUTHERN PARTS OF THE CWA AND
WILL CONTINUE TO MOVE NORTHEAST OVERNIGHT AND IT WILL BECOME
HEAVY AT TIMES, ESPECIALLY FROM THE PHILADELPHIA METROPOLITAN AREA
SOUTHWARD, WHERE ISOLATED THUNDERSTORMS ARE ALSO POSSIBLE. A
FAIRLY GOOD PLUME OF MOISTURE OFF THE ATLANTIC WILL CONTINUE TO
DEVELOP OUT AHEAD OF THE UPPER LOW.
WE CONTINUE TO EXPECT RAINFALL AMOUNTS OF 1.5 TO 2.0 INCHES IN
SOUTHEASTERN PENNSYLVANIA, SOUTHERN NEW JERSEY, DELAWARE AND
NORTHEASTERN MARYLAND THROUGH MONDAY MORNING. LOCALLY HIGHER
AMOUNTS, UP TO 3.0 INCHES, ARE POSSIBLE. LESSER AMOUNTS OF RAIN ARE
EXPECTED FOR CENTRAL AND NORTHERN NEW JERSEY, THE LEHIGH VALLEY AND
THE POCONOS, PERHAPS IN THE 0.75 TO 1.5 INCH RANGE.
BASED ON THE FLASH FLOOD AND HEADWATER GUIDANCE, WE WILL CONTINUE
THE FLOOD WATCH. ADDITIONAL DETAILS ARE DISCUSSED IN THE HYDROLOGY
SECTION BELOW.
A FAIRLY BRISK LOW LEVEL JET, AROUND 60 KNOTS OR SO, IS FORECAST TO
DEVELOP ON THE NORTH SIDE OF THE LOW. WHILE THE STRONGEST WINDS ARE
NOT EXPECTED TO MIX DOWN TO THE SURFACE, IT WILL BE BREEZY THROUGH
MONDAY MORNING.
AS A RESULT OF THE STRONG WINDS ALOFT, HAVE ISSUED A WIND ADVISORY
PRIMARILY FOR THOSE COUNTIES CLOSEST TO THE ACTION, OR NEAR THE
SOUTHERN END OF CWA OF EASTERN MARYLAND, SOUTHERN DELAWARE AND THE
ENTIRE NJ COAST. THE ADVISORY IS BEGINNING AT A LATER TIME UP NORTH.
&&
.SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/...
THE UPPER LOW IS FORECAST TO PASS OFF THE DELMARVA COAST ON MONDAY
MORNING. HOWEVER, ENOUGH MOISTURE SHOULD WRAP AROUND THE SYSTEM TO
KEEP OUR REGION UNDER RAINY COOL CONDITIONS FOR MONDAY. SOME HEAVY
RAIN CONTINUES TO BE EXPECTED IN THE SOUTHERN TWO THIRDS OF OUR
FORECAST AREA, MAINLY DURING THE MORNING HOURS.
THE UPPER LOW IS FORECAST TO CONTINUE MOVING OUT TO SEA ON TUESDAY
AND WEDNESDAY. A GRADUAL DRYING TREND IN ANTICIPATED FOR MONDAY
NIGHT INTO TUESDAY. HIGH PRESSURE SHOULD BEGIN TO TAKE HOLD FROM
TUESDAY NIGHT INTO WEDNESDAY.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
AN UPPER LEVEL RIDGE IS EXPECTED TO EXTEND UP THE EAST COAST ON
WEDNESDAY NIGHT. THE RIDGE SHOULD DRIFT TO THE EAST AND FARTHER OFF
THE COAST ON THURSDAY.
AN UPPER LEVEL TROUGH IS FORECAST TO DIG DOWN OVER THE EASTERN
STATES FOR FRIDAY AND FOR THE COMING WEEKEND. AS A RESULT, WE ARE
EXPECTING AN UNSETTLED PERIOD, WITH A CHANCE OF SHOWERS EACH DAY.
&&
.AVIATION /01Z MONDAY THROUGH FRIDAY/...
A WELL DEFINED STORM SYSTEM IN THE OHIO VALLEY WILL GIVE WAY TO A
SECONDARY LOW PRESSURE SYSTEM THAT IS DEVELOPING IN THE VICINITY
OF SOUTHEASTERN VIRGINIA THIS EVENING. THIS SECOND STORM WILL
BECOME THE MAIN ONE AND THEN GRADUALLY TRACK NORTHEASTWARD THROUGH
MONDAY. CEILINGS WILL CONTINUE TO LOWER DURING THE REST OF THE
EVENING TO MVFR AND THEN TO IFR OVERNIGHT INTO MONDAY MORNING.
THERE COULD BE SOME LIFR CONDITIONS ESPECIALLY DURING SOME HEAVIER
RAIN. THERE WILL BE A COUPLE OF THINGS GOING ON WITH THIS STORM,
AS THE UPPER FEATURE MOVES INTO THE MID ATLANTIC LATE TONIGHT AND
MONDAY MORNING. AS THIS OCCURS AND THE NEW SURFACE LOW STRENGTHENS,
THE RAIN SHIELD THAT IS MOVING INTO OUR AREA SHOULD PIVOT AROUND
AND PROBABLY BECOME ORIENTATED MORE WEST TO EAST. THEREFORE, RAIN
WILL CONTINUE TO OVERSPREAD THE REGION THROUGH THE EVENING, AND
BECOME HEAVY AT TIMES LATER TONIGHT AND MONDAY MORNING ESPECIALLY
FROM KPHL ON SOUTH AND EASTWARD. WITH THE SECONDARY STORM TAKING
OVER, THE MAIN INSTABILITY AREA HAS BEEN PUSHED TO OUR SOUTH.
FORECAST SOUNDINGS DO NOT REALLY POINT TO MUCH IN THE WAY OF
ELEVATED INSTABILITY, THEREFORE WE REMOVED THE CB REFERENCE, EVEN
THOUGH AN ISOLATED THUNDERSTORM OR TWO CANNOT BE RULED OUT.
REGARDING WINDS, THEY MAY TEND TO DIMINISH JUST A TOUCH FOR A LITTLE
AWHILE THIS EVENING, MAINLY FARTHER INLAND. HOWEVER AS THE SECONDARY
SURFACE LOW GETS GOING, WE ARE EXPECTING THE WINDS TO INCREASE
THROUGH THE OVERNIGHT. THE LOW-LEVEL JET IS FORECAST TO INCREASE TO
ABOUT 60 KNOTS. THE VAD WIND PROFILE FROM DOPPLER RADARS INDICATES
WINDS AROUND 2,000 FEET HAVE INCREASED TO NEAR 30 KNOTS AROUND OUR
REGION AND NEAR 40 KNOTS FURTHER SOUTH AND SOUTHWEST. THERE APPEARS
TO NOT BE MUCH IN THE WAY OF DIRECTIONAL SHEAR WITHIN THE FIRST
4,000 FEET, HOWEVER SPEED SHEAR IS ANTICIPATED TO INCREASE QUITE A
BIT. AS A RESULT, WE MAINTAINED THE MENTION OF LOW-LEVEL WIND
SHEAR. WIND GUSTS MAY BE A LITTLE TRICKY AS IT WILL DEPEND
SOMEWHAT ON TURBULENT/VERTICAL MIXING AS THERE WILL BE A LOT OF
WIND JUST ABOVE THE SURFACE. THE PRESSURE GRADIENT WILL BE TIGHTENING
UP, THEREFORE THIS SHOULD HELP TO CREATE INCREASING GUSTS THROUGH
THE OVERNIGHT. ON MONDAY, STRONG GUSTS MAY OCCUR ON THE BACKSIDE
OF THE SURFACE LOW AS WINDS TURN MORE TO THE NORTH. FOR NOW, WE
INDICATED GUSTS BETWEEN 30 AND 35 KNOTS /SOME HIGHER GUSTS ARE NOT
OUT OF THE QUESTION/.
OUTLOOK...
THE RAIN SHOULD BE TAPERING OFF LATE MONDAY AFTERNOON, WITH THE
SYSTEM PULLING AWAY MONDAY EVENING. CEILINGS ARE EXPECTED TO IMPROVE
DURING MONDAY NIGHT, WITH THE TRUE IMPROVEMENT PROBABLY NOT
OCCURRING UNTIL AFTER 00Z TUESDAY. A MORE NOTED IMPROVEMENT IS
EXPECTED ON TUESDAY AS DRIER AIR MAKES MORE OF A PUSH INTO OUR AREA.
HIGH PRESSURE WILL BUILD IN FOR WEDNESDAY, THEN ANOTHER COLD FRONT
APPROACHES THURSDAY. A WEAK AREA OF HIGH PRESSURE THEN TRIES TO
BUILD IN ON FRIDAY.
&&
.MARINE...
LOW PRESSURE OVER THE OHIO VALLEY WILL MOVE EASTWARD AND WEAKEN
AS A SECONDARY LOW CONTINUES TO ORGANIZE IN THE VICINITY OF
SOUTHEASTERN VIRGINIA. THIS SECOND STORM WILL BECOME THE MAIN ONE
AND MOVE NORTHEASTWARD THROUGH MONDAY. A STRENGTHENING EASTERLY
FLOW WILL INCREASE THE SEAS. GALE WARNINGS REMAIN IN EFFECT FOR
ALL THE COASTAL ZONES AND LOWER DELAWARE BAY. WIND GUSTS TO ABOUT
40 KNOTS ARE EXPECTED.
BASED ON FORECAST SOUNDINGS FROM BOTH THE NAM AND GFS FOR UPPER
DELAWARE BAY, WE UPGRADED THE SMALL CRAFT ADVISORY TO A GALE
WARNING. IT APPEARS THAT THERE WILL BE ABOUT A 6-HOUR WINDOW FOR
GALE FORCE GUSTS LATER TONIGHT AND EARLY MONDAY MORNING. WINDS MAY
THEN SETTLE DOWN A LITTLE SO WE THEN DROPPED DOWN TO A SMALL CRAFT
ADVISORY AT 12Z MONDAY. ON THE BACK SIDE OF THE LOW, THERE COULD
BE SOME GALE FORCE WIND GUSTS IN UPPER DELAWARE BAY, THEREFORE
THIS WILL BE MONITORED CLOSELY. SEAS ARE EXPECTED TO RAPIDLY
INCREASE WITH THE STRONG ONSHORE FLOW THROUGH THE OVERNIGHT /BUOY
44009 ALREADY UP TO 7.0 FEET/. WAVEWATCH INDICATES SEAS WILL MAKE
IT AS HIGH AS 12 FEET OVERNIGHT THEN 14 FEET LATER MONDAY. FOR NOW
WE WENT AS HIGH AS 12-13 FEET. ONCE THE SEAS BUILD, THEY WILL
REMAIN HIGH THROUGH AT LEAST THURSDAY, AND POSSIBLY LATER.
HIGH PRESSURE SHOULD FOLLOW FOR THE MIDDLE OF THE WEEK, HOWEVER A
COLD FRONT IS LIKELY TO APPROACH THURSDAY.
&&
.HYDROLOGY...
EVENT RAINFALL TOTALS OF 1.5 TO 2.0 INCHES SHOULD BE COMMON FROM THE
PHILADELPHIA METROPOLITAN AREA SOUTHWARD FROM TONIGHT INTO MONDAY
MORNING. SOME SPOTS COULD PICK UP NEAR 3.0 INCHES.
BASED ON THE LATEST FLASH FLOOD AND HEADWATER GUIDANCE, OUR MAIN
CONCERN IS FOR ANY LOCATION THAT IS EXPECTED TO RECEIVE 2 INCHES OR
MORE OF RAIN IN THE TRENTON-PHILADELPHIA-WILMINGTON CORRIDOR.
NORTHERN NEW CASTLE COUNTY REMAINS THE MOST SUSCEPTIBLE, AND FOR
THAT AREA WE WILL FOCUS MORE ON THE 1.0 TO 1.5 INCH RANGE.
WITH THE ABOVE CONSIDERATIONS IN MIND, ALONG WITH THE LATEST
FORECAST GUIDANCE, WE WILL KEEP THE FLOOD WATCH FOR THE SAME FIVE
COUNTIES AS BEFORE, CECIL, NEW CASTLE, CHESTER, DELAWARE AND
PHILADELPHIA. WE HAVE DECIDED TO START THE WATCH TWO HOURS EARLIER,
AT MIDNIGHT INSTEAD OF 200 AM.
&&
.TIDES/COASTAL FLOODING...
BASED ON THE LATEST AVAILABLE GUIDANCE, A COASTAL FLOOD WARNING WILL
BE ISSUED FOR ALL OF OUR OCEAN ZONES, DEL BAY ZONES AND THE DEL
RIVER S OF PHL. A COASTAL FLOOD ADVISORY WILL ALSO BE ISSUED FOR
THE CHESAPEAKE BAY ZONES. BOTH THE WARNING AND ADVISORY WILL GO
INTO EFFECT AT MIDNIGHT TONIGHT AND REMAIN THRU 12Z TUESDAY. THE
WARNING/ADVISORY MAY NEED TO BE FURTHER EXTENDED BEYOND 12Z TUESDAY
AT A LATER TIME.
THE LATEST GUIDANCE INDICATES THAT WIDESPREAD MINOR TIDAL FLOODING
IS LIKELY AND MODERATE IS A STRONG POSSIBILITY IN THE WARNING AREA.
FOR THE SAKE OF CLARITY AND DUE TO THE STAGGERED HIGH TIDE TIMES
FROM THE OCEAN TO THE BAY AND DEL RIVER, THE TIMES WERE ADJUSTED SO
THAT BOTH PRODUCTS HAD THE SAME VALID TIMES. THE NGM AND AVIATION
TIDAL GUIDANCE ARE IN DECENT AGREEMENT WITH STRONG POSITIVE
ANOMALIES, SO THERE IS REASONABLE CONFIDENCE IN THIS FCST.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...COASTAL FLOOD WARNING FROM MIDNIGHT TONIGHT TO 8 AM EDT
TUESDAY FOR PAZ070-071.
FLOOD WATCH FROM MIDNIGHT EDT TONIGHT THROUGH MONDAY AFTERNOON
FOR PAZ067-070-071.
NJ...COASTAL FLOOD WARNING FROM MIDNIGHT TONIGHT TO 8 AM EDT
TUESDAY FOR NJZ012>014-016>027.
WIND ADVISORY FROM 4 AM TO 4 PM EDT MONDAY FOR NJZ012>014-020-
026.
WIND ADVISORY UNTIL 4 PM EDT MONDAY FOR NJZ021>025-027.
DE...COASTAL FLOOD WARNING FROM MIDNIGHT TONIGHT TO 8 AM EDT
TUESDAY FOR DEZ001>004.
WIND ADVISORY UNTIL 4 PM EDT MONDAY FOR DEZ002>004.
FLOOD WATCH FROM MIDNIGHT EDT TONIGHT THROUGH MONDAY AFTERNOON
FOR DEZ001.
MD...WIND ADVISORY UNTIL 4 PM EDT MONDAY FOR MDZ019-020.
FLOOD WATCH FROM MIDNIGHT EDT TONIGHT THROUGH MONDAY AFTERNOON
FOR MDZ008.
COASTAL FLOOD ADVISORY FROM MIDNIGHT TONIGHT TO 8 AM EDT
TUESDAY FOR MDZ008-012-015-019-020.
MARINE...GALE WARNING UNTIL 6 AM EDT TUESDAY FOR ANZ431-452>455.
GALE WARNING UNTIL 6 AM EDT TUESDAY FOR ANZ450-451.
SMALL CRAFT ADVISORY FROM 8 AM MONDAY TO 6 AM EDT TUESDAY FOR
ANZ430.
GALE WARNING UNTIL 8 AM EDT MONDAY FOR ANZ430.
&&
SYNOPSIS...IOVINO/GORSE
NEAR TERM...IOVINO/EBERWINE
SHORT TERM...IOVINO
LONG TERM...IOVINO
AVIATION...GORSE
MARINE...NIERENBERG/GORSE
HYDROLOGY...IOVINO
TIDES/COASTAL FLOODING...NIERENBERGHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 928 PM EDT SUN MAY 11 2008 NJZ001-007>010-PAZ054-055-062-121900- SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-NORTHAMPTON- 928 PM EDT SUN MAY 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND NORTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NJZ012>014-121900- MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... ...WIND ADVISORY IN EFFECT FROM 4 AM TO 4 PM EDT MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND NORTHERN NEW JERSEY. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. WIND ADVISORY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. WIND ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF ANY COASTAL FLOODING AND STRONG WIND GUSTS WOULD BE APPRECIATED. NJZ020-026-121900- OCEAN-COASTAL OCEAN- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... ...WIND ADVISORY IN EFFECT FROM 4 AM TO 4 PM EDT MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN NEW JERSEY. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. WIND ADVISORY. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. WIND ADVISORY. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF ANY COASTAL FLOODING AND STRONG WIND GUSTS WOULD BE APPRECIATED. DEZ002>004-NJZ021>025-027-121900- KENT DE-INLAND SUSSEX-DELAWARE BEACHES-CUMBERLAND-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-SOUTHEASTERN BURLINGTON- 928 PM EDT SUN MAY 11 2008 ...WIND ADVISORY IN EFFECT UNTIL 4 PM EDT MONDAY... ...COASTAL FLOOD WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE AND SOUTHERN NEW JERSEY. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. COASTAL FLOOD WARNING. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. COASTAL FLOOD WARNING. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF ANY COASTAL FLOODING AND STRONG WIND GUSTS WOULD BE APPRECIATED. DEZ001-PAZ070-071-121900- NEW CASTLE-DELAWARE-PHILADELPHIA- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... ...FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. FLOOD WATCH. RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. FLOOD WATCH. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF FLOODING AND RAINFALL AMOUNTS WOULD BE APPRECIATED. MDZ008-121900- CECIL- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... ...FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF FLOODING AND RAINFALL AMOUNTS WOULD BE APPRECIATED. MDZ019-020-121900- TALBOT-CAROLINE- 928 PM EDT SUN MAY 11 2008 ...WIND ADVISORY IN EFFECT UNTIL 4 PM EDT MONDAY... ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN MARYLAND. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF FLOODING, STRONG WINDS GUSTS AND RAINFALL AMOUNTS WOULD BE APPRECIATED. NJZ016>019-121900- SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD WARNING IN EFFECT UNTIL 8 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN NEW JERSEY. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD WARNING. IN ADDITION, RAIN MAY BE HEAVY AT TIMES OVER MUCH OF THE AREA MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE COASTAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. REPORTS OF ANY TIDAL FLOODING AND RAINFALL AMOUNTS WOULD BE APPRECIATED. NJZ015-PAZ060-061-068-069-121900- MERCER-BERKS-LEHIGH-MONTGOMERY-BUCKS- 928 PM EDT SUN MAY 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT RAIN MAY BE HEAVY AT TIMES LATER TONIGHT, WHICH COULD PRODUCE LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND SOME ROADWAYS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY RAIN MAY BE HEAVY AT TIMES MONDAY, WHICH COULD PRODUCE LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND SOME ROADWAYS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HOWEVER, RAINFALL REPORTS WOULD BE APPRECIATED. PAZ067-121900- CHESTER- 928 PM EDT SUN MAY 11 2008 ...FLOOD WATCH IN EFFECT THROUGH MONDAY AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. RAIN MAY BE HEAVY AT TIMES TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. RAIN MAY BE HEAVY AT TIMES MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. REPORTS OF FLOODING AND RAINFALL AMOUNTS WOULD BE APPRECIATED. MDZ012-015-121900- KENT MD-QUEEN ANNES- 928 PM EDT SUN MAY 11 2008 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES LATER TONIGHT. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. COASTAL FLOOD ADVISORY. RAIN MAY BE HEAVY AT TIMES MONDAY. LOCALIZED FLOODING OF POOR DRAINAGE AREAS AND ROADWAYS IS POSSIBLE, AND THE RAINFALL MAY EXACERBATE TIDAL FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HOWEVER, REPORTS OF RAINFALL AMOUNTS AND ANY TIDAL FLOODING WOULD BE APPRECIATED. ANZ431-452>455-121900- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- 928 PM EDT SUN MAY 11 2008 ...GALE WARNING IN EFFECT UNTIL 6 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ450-451-121900- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- 928 PM EDT SUN MAY 11 2008 ...GALE WARNING IN EFFECT UNTIL 6 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-121900- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 928 PM EDT SUN MAY 11 2008 ...GALE WARNING IN EFFECT UNTIL 8 AM EDT MONDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM MONDAY TO 6 AM EDT TUESDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS. .DAY ONE...TONIGHT PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. GALE WARNING. SMALL CRAFT ADVISORY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. GORSE
The national radar mosaic for the moment the first event began.
1 strong wind. Local standard time, as filed.
A 47 mph wind gust was reported at the Ridgely Airport around 11:35 PM EDT on the 11th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2008Every state in 2008This day in weather historyWarnings in Maryland, May 2008
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 105757.