Alert archive / Maryland / Special Weather Statements in 2011
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 19, 2011, 1:00 AM EDT for Cecil County, Maryland. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 19, 2011, 1:00 AM EDT (05:00 UTC)
- Expired
- Aug 19, 2011, 1:45 AM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 86 km from the middle of the area, began a volume at 05:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 5.0 hours before the alert went out and 179 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1773 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
239
WWUS81 KPHI 190500
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
100 AM EDT FRI AUG 19 2011
DEZ001-002-MDZ008-012-015-190545-
CECIL MD-KENT MD-KENT DE-NEW CASTLE DE-QUEEN ANNE'S MD-
100 AM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL AFFECT CECIL...KENT...NEW CASTLE AND
QUEEN ANNE'S COUNTIES...
AT 1255 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 23 MILES SOUTH OF
LANCASTER TO 17 MILES NORTH OF CENTERVILLE...MOVING SOUTHEAST AT 25
MPH. THE THUNDERSTORMS WILL BE NEAR CRUMPTON AROUND 105 AM...ROCK
SPRINGS AROUND 110 AM...CONOWINGO...RICHARDSMERE...OCTORARO...
SUDLERSVILLE AROUND 115 AM...PERRYVILLE...MILLINGTON AROUND 120 AM...
WEST NOTTINGHAM AND RISING SUN AROUND 125 AM.
VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.
ISOLATED WESTERLY WIND GUSTS OF 30 TO 40 MPH ARE POSSIBLE WITH THESE
STORMS.
LAT...LON 3973 7623 3972 7613 3963 7585 3938 7565
3920 7563 3904 7545 3923 7603 3937 7612
3938 7607 3945 7600 3946 7602 3953 7599
3956 7610 3969 7623
$$
FORECASTER: DRAGWhat forecasters said that day
The local office's own words before this special weather statement went out, 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 this special weather statement went out at Aug 18, 11:13 PM EDT, 1 hour 47 minutes earlier.
Area forecast discussion, Aug 18, 11:13 PM EDT, 1 hour 47 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1113 PM EDT THU AUG 18 2011
.SYNOPSIS...
A WEAK FRONTAL BOUNDARY IS BECOMING ESTABLISHED ALONG THE MARYLAND
PENNSYLVANIA BORDER INTO SOUTH CENTRAL NEW JERSEY AND WILL BE THE
FOCUS PERIODS OF HEAVY THUNDERSTORMS THROUGH AT LEAST FRIDAY. THIS
FRONT MAY CONTINUE TO BE FOCUS OF STORMS THROUGH THE WEEKEND IF IT
DOESNT DISSIPATE. A STRONGER COLD FRONT IS FORECAST TO CROSS THE AREA
LATER SUNDAY. COMFORTABLY WARM SUMMER WEATHER SHOULD FOLLOW MONDAY
AND TUESDAY AS HIGH PRESSURE IN THE OHIO VALLEY SPRAWLS EASTWARD.
THE HIGH MOVES OFFSHORE WEDNESDAY RESUMING A VERY WARM HUMID SUMMER
PATTERN.
&&
.NEAR TERM /UNTIL 7 AM FRIDAY MORNING/...
SEE THE HYDROLOGY SECTION BELOW FOR ADDED DETAIL ON THE FLASH FLOOD
WATCH FOR MUCH OF OUR AREA FROM LATE TONIGHT INTO OR THROUGH FRIDAY
NIGHT.
AS YOU ARE PROBABLY AWARE...MODEL CONVECTIVE QPF IS WOEFULLY
INADEQUATE IN THIS PATTERN WHERE THERE IS MORE THAN MEETS THE EYE.
BASICALLY A COOLER THICKNESS PATTERN WITH PWAT NEAR 1.5 INCHES
WHICH STILL YIELDS EXCESSIVE RAINFALL. TODAYS NEARLY 2 INCHES IN
PHL IS NOT A RECORD BUT ESTABLISHED AN NEW RECORD MONTHLY TOTAL
FOR PHL AND AN RER WILL POST SHORTLY.
A FRONTAL BOUNDARY EVIDENT LAST NIGHT IN SOUTHERN PA AND WHICH
WASHED OUT DURING THE DAY IS REFORMING NOW ALONG THE MASON DIXON
LINE TO NEAR ACY. IT SHOULD SERVE TO FOCUS WAA HEAVY QPF OVERNIGHT
AND IF THE READ IS CORRECT AND THE TSTMS IN NORTHERN MARYLAND HOLD
TOGETHER AND BUILD EASTWARD ALONG THE BOUNDARY...IT COULD BE NASTY
IN PARTS OF THE METRO AREA NEAR DAWN FRIDAY. THERE IS STILL SOME
DOUBT AS TO HOW STRONG THE CONVECTION WILL BE AFTER 06Z BUT HAVE
INCREASED POPS AND QPF IN THE 145 PM UPDATE. THE SOUTHERN PART OF
THE WATCH WAS MOVED UP A FEW HOURS TO ALLOW FOR EARLIER FFW IF
NEEDED AROUND 2 OR 3 AM.
&&
.SHORT TERM /7 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/...
LOW PRESSURE SURFACE AND ALOFT WILL MOVE INTO WESTERN PORTIONS OF
OUR AREA DURING FRIDAY MORNING...WITH THE NAM INDICATING A SURFACE
LOW OVER THE CHESAPEAKE AND NORTHEASTERN MARYLAND REGION FRIDAY
AFTERNOON. ONGOING SCATTERED TO BROKEN SHOWERS AND THUNDERSTORMS
FROM LATE TONIGHT WILL BLEED INTO FRIDAY MORNING...WITH ACTIVITY
EXPECTED TO GROW SOUTH AND EAST INTO THE AFTERNOON. AGAIN...WITH
HIGH PRECIPITABLE WATER VALUES AND RATHER SLOW-MOVING CELLS WHICH
MAY TEND TO CLUSTER...EXCESSIVE RAINFALL IS NOT OUT OF THE
QUESTION...ALTHOUGH THE FLASH FLOOD WATCH IS JUST ABOVE THE
LOW-CONFIDENCE THRESHOLD.
NAM MOS WAS MORE AGGRESSIVE WITH CLOUDS AND PRECIPITATION...AND
HENCE FORECAST LOWER HIGH TEMPERATURES. A BLEND WITH THE WARMER GFS
MOS WAS USED.
&&
.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
THIS TIME FRAME CONTINUES THE UNSETTLED THEME WITH UPPER-LEVEL
TROUGHING ACROSS THE NORTHEAST AND MID ATLANTIC. IN ADDITION, A
SURFACE BOUNDARY WILL BE IN THE AREA TO START BEFORE A STRONGER
FRONT MOVES THROUGH LATE SUNDAY. WHILE THE LARGE SCALE PICTURE
IS GENERALLY AGREED UPON BY THE GUIDANCE, THERE IS LOWER CONFIDENCE
REGARDING THE DETAILS. THE STRONGER FRONT SHOULD SWEEP EAST OF THE
AREA BY EARLY MONDAY WITH LARGE HIGH PRESSURE BUILDING IN FROM THE
WEST TUESDAY AND WEDNESDAY. THIS SHOULD BRING MUCH DRIER AIR INTO
THE REGION FOR A FEW DAYS BEFORE SOMEWHAT OF A RETURN FLOW STARTS
DEVELOPING TOWARD THURSDAY.
FRIDAY NIGHT AND SATURDAY...AN UPPER TROUGH REMAINS ACROSS THE AREA
WITH A SURFACE BOUNDARY STALLED IN THE VICINITY. A WEAK SURFACE LOW
SHOULD TEND TO TRACK GENERALLY ACROSS THE DELMARVA REGION AS WELL.
SEVERAL SHORT WAVES EMBEDDED IN THE WEST/NORTHWEST FLOW WILL TEAM UP
WITH SURGES OF WAA AND MOISTURE ADVECTION TO INITIATE CONVECTION.
THE GREATEST CONCENTRATION OF CONVECTION SHOULD BE IN THE AFTERNOON
AND EVENING HOURS. HOWEVER, DEPENDING ON THE TIMING OF ANY SUBTLE
SHORT WAVES TEAMING UP WITH AT LEAST MID LEVEL INSTABILITY COULD
KEEP ISOLATED TO SCATTERED CONVECTION GOING DURING THE NIGHT. PW
VALUES ARE FORECAST TO BE AROUND 1.5 INCHES, THEREFORE LOCALLY HEAVY
CONVECTIVE RAIN WILL BE POSSIBLE. THE CONVECTION MAY TEND TO BE LESS
ON SATURDAY AS THE TROUGH AXIS SHIFTS EAST. THE GFS MAY BE OVERDONE
AS A RESULT WITH THE CONVECTION. BASED ON THE FLOW, CONVECTIVE
ELEMENTS MAY STILL BE SLOW MOVERS FRIDAY NIGHT THUS LOCALLY
ENHANCING THE RAINFALL RATES. GIVEN THE WEALTH OF RAIN THAT HAS
FALLEN ACROSS MANY AREAS THUS FAR THIS MONTH, A PORTION OF THE FLASH
FLOOD WATCH FROM THE NEAR/SHORT TERMS WILL BE IN EFFECT UNTIL 10Z
SATURDAY.
SUNDAY AND MONDAY...A MORE SIGNIFICANT UPPER-LEVEL TROUGH WILL MOVE
THROUGH SUNDAY AND SUNDAY NIGHT. THIS WILL DRIVE A STRONGER SURFACE
COLD FRONT ACROSS THE REGION. AS THE HEIGHTS FALL MORE
SUBSTANTIALLY AND A BELT OF STRONGER MID LEVEL FLOW ACCOMPANIES THE
TROUGH, A MORE ORGANIZED CONVECTIVE THREAT MAY UNFOLD. AT LEAST
SCATTERED SHOWERS AND THUNDERSTORMS ARE ANTICIPATED SUNDAY AND
SUNDAY NIGHT WITH THE COLD FRONT AND POSSIBLY EVEN INITIALLY WITH A
LEE SIDE TROUGH OR LEAD WEAK SURFACE DISTURBANCE. LOCALLY HEAVY RAIN
WILL AGAIN BE POSSIBLE WITHE SOME SIGNALS IN THE MODEL GUIDANCE
POINTING TO SOME ORGANIZED CLUSTERS OF STRONGER CONVECTION. AT THIS
POINT, THE 12Z NAM LOOKS OVERDONE WITH ITS STRONGER AND MORE
CONSOLIDATED SURFACE REFLECTION SUNDAY AFTERNOON. THE FRONT SHOULD
BE SHUNTED TO OUR EAST EARLY MONDAY MORNING AS LARGE HIGH PRESSURE
ARRIVES FROM THE WEST. SOME MODEL GUIDANCE LINGERS THE FRONT BACK
SOME MONDAY WHICH WOULD ALLOW FOR ISOLATED CONVECTION, HOWEVER FOR
NOW WE WILL PUSH THE FRONT FAR ENOUGH EAST AND JUST KEEP A SLIGHT
CHC POP MAINLY INLAND.
TUESDAY THROUGH THURSDAY...HIGH PRESSURE IS FORECAST TO SETTLE
ACROSS THE AREA TUESDAY AND WEDNESDAY BEFORE SETTLING TO THE
SOUTHEAST THURSDAY. THIS ALONG WITH THE ASSOCIATED AIRMASS WITH THE
LARGE SURFACE HIGH WOULD BRING MUCH DRIER AIR INTO OUR REGION.
THEREFORE, WE FAVORED A DRY FORECAST AND LOWER DEW POINTS. WE MAY
START TO GET SOME RETURN FLOW BY THURSDAY AS THE SURFACE HIGH BEGINS
TO ELONGATE AND SHIFT TO OUR SOUTH AND EAST.
FOR SUNDAY NIGHT THROUGH THURSDAY, WE INITIALIZED WITH HPC GUIDANCE
/A BLEND OF THE GEFS AND ECMWF ENSEMBLE MEAN/ THEN MADE SOME MAINLY
MINOR TWEAKS BASED ON ADDITIONAL COLLABORATION.
&&
.AVIATION /03Z FRIDAY THROUGH TUESDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.
THROUGH 12Z...VFR EXCEPT IFR CONDS IN TSTMS...MAINLY KPNE-KPHL-KACY
KILG. LIGHT WIND.
AFTER 12Z FRIDAY...VFR EXCEPT IFR CONDS IN TSTMS...ESPECIALLY SE
PA...S 1/2 NJ NE MD AND N DEL.
OUTLOOK...
FRIDAY NIGHT...LOCALLY SUB-VFR DUE TO ANY SHOWERS AND THUNDERSTORMS
AND PERHAPS SOME FOG.
SATURDAY...GENERALLY VFR WITH LOW CONFIDENCE REGARDING ANY LINGERING
CONVECTION.
SUNDAY...A STRONGER COLD FRONT MOVES INTO THE AREA WITH AT LEAST
SCATTERED SHOWERS AND THUNDERSTORMS. SUB-VFR CONDITIONS ARE
ANTICIPATED WITH ANY SHOWERS AND THUNDERSTORMS.
MONDAY AND TUESDAY...VFR AS HIGH PRESSURE BUILDS IN, HOWEVER CANNOT
RULE OUT SOME LOCALIZED EARLY MORNING FOG.
&&
.MARINE...
NO HEADLINES THROUGH AT LEAST FRIDAY NIGHT.
MAIN HAZARD IS TSTMS WITH POSSIBLE GUSTS 30 KNOTS.
SE SWELL OF 1-2 FT CONTINUES.
FRONTAL BOUNDARY SHOULD BECOME ESTABLISHED VICINITY ATLANTIC CITY
WEST TO THE MARYLAND-PA BORDER BY MORNING WITH LIGHT SOUTH WIND
TO ITS SOUTH AND E-SE TO ITS NORTH.
OUTLOOK...
THE WINDS AND SEAS ARE ANTICIPATED TO REMAIN BELOW SMALL CRAFT
ADVISORY FRIDAY NIGHT THROUGH TUESDAY. A WEAK FRONT NEAR THE AREA
FRIDAY NIGHT SHOULD FOCUS SOME SHOWERS AND THUNDERSTORMS WITH
POTENTIALLY LOCALLY ENHANCED WINDS AND SEAS. SOME WEAKNESS MAY STILL
BE IN THE VICINITY SATURDAY, THEREFORE CANNOT RULE OUT AN ISOLATED
SHOWER OR THUNDERSTORM. A STRONGER COLD FRONT WILL APPROACH SUNDAY
THEN SWEEP EAST OF THE AREA BY EARLY MONDAY. THE SOUTHERLY FLOW
AHEAD OF THE FRONT SHOULD INCREASE SOME SUNDAY BUT SHOULD REMAIN
UNDER 25 KNOTS. THE NAM SEEMS TO ROBUST WITH THE SURFACE REFLECTION
ALONG THE FRONT. HIGH PRESSURE BUILDS IN TUESDAY AND WEDNESDAY WITH
A GENERAL OFFSHORE FLOW. OCEAN SEAS SHOULD TOP OUT NO HIGHER THAN
4 FEET.
&&
.HYDROLOGY...
SOUTHERN PART OF FFA STARTED SOONER AND A MINOR CHANGE...BUT
CONSIDERING THE FRONTAL BOUNDARY BECOMING ESTABLISHED FROM VCNTY
MD/PA BORDER TO NEAR KACY...FELT THAT THE POTENTIAL EXISTED FOR
WAA FOCUS OF HEAVY CONVECTION ALONG THE FRONT OVERNIGHT.
GROUND IS NEARLY SATURATED AND GRIDDED FFG COMBINED WITH FFMP WILL
ASSIST ON FUTURE WARNINGS.
PWAT NEAR 1.5 INCHES IN BENIGN PATTERN OF UNSTABLE LAPSE RATES AND
PULSES OF GENERALLY SLOW MOVING CONVECTION. IF WE FOCUS ON A FRONT
IT WONT BE IMPOSSIBLE TO SEE 5 INCHES OF RAIN BETWEEN 1 AM AND 1PM
FRIDAY. FOR NOW 4 INCHES IN THE FFA.
AS YOU KNOW MODEL GUIDANCE IS WOEFULLY UNDERDONE ON QPF. MASS
FIELDS ARE BEING USED...INCLUSIVE OF KI/TT AND WEAK SFC CONVERGENT
FORCING AS WELL AS 700 STEERING CURRENTS. I AM TRIPLING THE GFS
AMTS...ALL MODELS ARE BIASED LOW ON CONVECTIVE RELATED
QPF...ESPECIALLY THE ECMWF. THE GFS IS BEST OF THE NCEP MODELS BUT
AGAIN WAY TOO CONSERVATIVE.
SUNDAY?: MAY NEED TO BE WATCHED FOR A BIGGER 12 HR CONCENTRATED
WIDESPREAD EVENT.
&&
.CLIMATE...
PHL: 12.24 SO FAR THIS MONTH WITH THE 1.98 SO FAR TODAY. RER WILL
POST SHORTLY. DAILY RECORD IS 2.54 IN 1901.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLASH FLOOD WATCH FROM 4 AM EDT FRIDAY THROUGH FRIDAY EVENING
FOR PAZ054-055-060>062.
FLASH FLOOD WATCH THROUGH LATE FRIDAY NIGHT FOR PAZ067>071.
NJ...FLASH FLOOD WATCH FROM 4 AM EDT FRIDAY THROUGH FRIDAY EVENING
FOR NJZ001-007>010-012.
FLASH FLOOD WATCH THROUGH LATE FRIDAY NIGHT FOR NJZ013>027.
DE...FLASH FLOOD WATCH THROUGH LATE FRIDAY NIGHT FOR DEZ001.
MD...FLASH FLOOD WATCH THROUGH LATE FRIDAY NIGHT FOR MDZ008-012.
MARINE...NONE.
&&
SYNOPSIS...DRAG/GORSE 1113P
NEAR TERM...DRAG/O'HARA 1113P
SHORT TERM...
LONG TERM...GORSE
AVIATION...DRAG/GORSE 1113P
MARINE...DRAG/GORSE 1113P
HYDROLOGY...1113P
CLIMATE...1113PHazardous weather outlook, Aug 18, 3:47 PM EDT, 9 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 347 PM EDT THU AUG 18 2011 NJZ001-007>010-012-PAZ054-055-060>062-192000- SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-CARBON-MONROE- BERKS-LEHIGH-NORTHAMPTON- 347 PM EDT THU AUG 18 2011 ...FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL PENNSYLVANIA AND NORTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE ANTICIPATED FOR SUNDAY AND SUNDAY NIGHT WITH THE POTENTIAL FOR LOCALLY HEAVY RAIN, WHICH MAY LEAD TO LOCALIZED FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ001-MDZ008-012-NJZ013>027-PAZ067>071-192000- NEW CASTLE-CECIL-KENT MD-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER- SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND- ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN-SOUTHEASTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- 347 PM EDT THU AUG 18 2011 ...FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE FRIDAY NIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...SOUTHERN NEW JERSEY AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE ANTICIPATED FOR SUNDAY AND SUNDAY NIGHT WITH THE POTENTIAL FOR LOCALLY HEAVY RAIN, WHICH MAY LEAD TO LOCALIZED FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ002>004-MDZ015-019-020-192000- KENT-INLAND SUSSEX-DELAWARE BEACHES-QUEEN ANNES-TALBOT-CAROLINE- 347 PM EDT THU AUG 18 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE AND NORTHEAST MARYLAND. .DAY ONE...THIS AFTERNOON AND TONIGHT. SOME SHOWERS AND THUNDERSTORMS THROUGH FRIDAY NIGHT WILL BE CAPABLE OF PRODUCING LOCAL DOWNPOURS, WHICH MAY LEAD TO LOCALIZED POOR DRAINAGE AND ROADWAY FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SOME SHOWERS AND THUNDERSTORMS ARE ANTICIPATED FOR SUNDAY AND SUNDAY NIGHT WITH THE POTENTIAL FOR LOCALLY HEAVY RAIN, WHICH MAY LEAD TO LOCALIZED FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ450>455-192000- 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- 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- 347 PM EDT THU AUG 18 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-192000- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 347 PM EDT THU AUG 18 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Local storm report, Aug 18, 8:56 PM EDT, 4 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
856 PM EDT THU AUG 18 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM LIGHTNING BRICK TWP 40.07N 74.12W
08/18/2011 OCEAN NJ TRAINED SPOTTER
HOUSE HIT BY LIGHTNING.
0520 PM HAIL VINCENTOWN 39.93N 74.75W
08/18/2011 E0.50 INCH BURLINGTON NJ PUBLIC
0530 PM HAIL PEMBERTON 39.97N 74.69W
08/18/2011 E0.50 INCH BURLINGTON NJ PUBLIC
0605 PM HAIL PORT DEPOSIT 39.60N 76.12W
08/18/2011 E1.00 INCH CECIL MD PUBLIC
0610 PM HAIL PERRYVILLE 39.57N 76.07W
08/18/2011 E1.00 INCH CECIL MD PUBLIC
0625 PM HAIL NORTH EAST 39.60N 75.94W
08/18/2011 E0.75 INCH CECIL MD PUBLIC
0630 PM HAIL NEWTOWN 40.23N 74.94W
08/18/2011 E0.50 INCH BUCKS PA TRAINED SPOTTER
0630 PM HAIL COCHRANVILLE 39.89N 75.92W
08/18/2011 E0.50 INCH CHESTER PA PUBLIC
0630 PM HAIL OXFORD 39.79N 75.98W
08/18/2011 E0.50 INCH CHESTER PA PUBLIC
0640 PM HAIL NEWTOWN 40.23N 74.94W
08/18/2011 E1.00 INCH BUCKS PA PUBLIC
0645 PM HAIL NEWARK 39.68N 75.76W
08/18/2011 E0.50 INCH NEW CASTLE DE PUBLIC
0700 PM TSTM WND DMG HOCKESSIN 39.78N 75.69W
08/18/2011 NEW CASTLE DE PUBLIC
TREE LIMBS DOWN.
0700 PM HAIL LADENBERG 39.78N 75.77W
08/18/2011 E1.25 INCH CHESTER PA PUBLIC
0700 PM HAIL LONDON BRITAIN TWP 39.75N 75.78W
08/18/2011 E0.88 INCH CHESTER PA TRAINED SPOTTER
0700 PM TSTM WND DMG LONDON BRITAIN TWP 39.75N 75.78W
08/18/2011 CHESTER PA TRAINED SPOTTER
TREE LIMBS DOWN.
0730 PM HAIL WEST CHESTER 39.96N 75.61W
08/18/2011 E0.88 INCH CHESTER PA PUBLIC
0740 PM HAIL BOOTHWYN 39.83N 75.44W
08/18/2011 E1.00 INCH DELAWARE PA TRAINED SPOTTER
0740 PM HAIL CLAYMONT 39.80N 75.46W
08/18/2011 E1.00 INCH NEW CASTLE DE PUBLIC
0802 PM TSTM WND GST PHILADELPHIA INTL AIRPO 39.87N 75.24W
08/18/2011 M62 MPH PHILADELPHIA PA ASOS
0825 PM HAIL FORT WASHINGTON 40.14N 75.19W
08/18/2011 E1.00 INCH MONTGOMERY PA TRAINED SPOTTER
0840 PM HAIL MOUNT LAUREL 39.93N 74.89W
08/18/2011 E0.75 INCH BURLINGTON NJ NWS EMPLOYEE
0850 PM HAIL FURLONG 40.30N 75.08W
08/18/2011 E0.75 INCH BUCKS PA TRAINED SPOTTER
&&
EVENT NUMBER PHI1100527 PHI1100523 PHI1100524 PHI1100525 PHI1100526
PHI1100529 PHI1100528 PHI1100531 PHI1100532 PHI1100530 PHI1100533
PHI1100534 PHI1100535 PHI1100540 PHI1100541 PHI1100538 PHI1100536
PHI1100537 PHI1100539 PHI1100542 PHI1100543 PHI1100544
IOVINOLocal storm report, Aug 18, 11:50 PM EDT, 1 hour 10 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1150 PM EDT THU AUG 18 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM LIGHTNING BRICK TWP 40.07N 74.12W
08/18/2011 OCEAN NJ TRAINED SPOTTER
HOUSE HIT BY LIGHTNING.
0520 PM HAIL VINCENTOWN 39.93N 74.75W
08/18/2011 E0.50 INCH BURLINGTON NJ PUBLIC
0530 PM HAIL PEMBERTON 39.97N 74.69W
08/18/2011 E0.50 INCH BURLINGTON NJ PUBLIC
0605 PM HAIL PORT DEPOSIT 39.60N 76.12W
08/18/2011 E1.00 INCH CECIL MD PUBLIC
0610 PM HAIL PERRYVILLE 39.57N 76.07W
08/18/2011 E1.00 INCH CECIL MD PUBLIC
0625 PM HAIL NORTH EAST 39.60N 75.94W
08/18/2011 E0.75 INCH CECIL MD PUBLIC
0630 PM HAIL NEWTOWN 40.23N 74.94W
08/18/2011 E0.50 INCH BUCKS PA TRAINED SPOTTER
0630 PM HAIL COCHRANVILLE 39.89N 75.92W
08/18/2011 E0.50 INCH CHESTER PA PUBLIC
0630 PM HAIL OXFORD 39.79N 75.98W
08/18/2011 E0.50 INCH CHESTER PA PUBLIC
0640 PM HAIL NEWTOWN 40.23N 74.94W
08/18/2011 E1.00 INCH BUCKS PA PUBLIC
0645 PM HAIL NEWARK 39.68N 75.76W
08/18/2011 E0.50 INCH NEW CASTLE DE PUBLIC
0700 PM TSTM WND DMG HOCKESSIN 39.78N 75.69W
08/18/2011 NEW CASTLE DE PUBLIC
TREE LIMBS DOWN.
0700 PM HAIL LADENBERG 39.78N 75.77W
08/18/2011 E1.25 INCH CHESTER PA PUBLIC
0700 PM HAIL LONDON BRITAIN TWP 39.75N 75.78W
08/18/2011 E0.88 INCH CHESTER PA TRAINED SPOTTER
0700 PM TSTM WND DMG LONDON BRITAIN TWP 39.75N 75.78W
08/18/2011 CHESTER PA TRAINED SPOTTER
TREE LIMBS DOWN.
0730 PM HAIL WEST CHESTER 39.96N 75.61W
08/18/2011 E0.88 INCH CHESTER PA PUBLIC
0740 PM HAIL BOOTHWYN 39.83N 75.44W
08/18/2011 E1.00 INCH DELAWARE PA TRAINED SPOTTER
0740 PM HAIL CLAYMONT 39.80N 75.46W
08/18/2011 E1.00 INCH NEW CASTLE DE PUBLIC
0745 PM HAIL CLAYMONT 39.80N 75.46W
08/18/2011 E1.00 INCH NEW CASTLE DE TRAINED SPOTTER
0755 PM HAIL BROOMALL 39.97N 75.35W
08/18/2011 E0.50 INCH DELAWARE PA TRAINED SPOTTER
0802 PM TSTM WND GST PHILADELPHIA INTL AIRPO 39.87N 75.24W
08/18/2011 M62 MPH PHILADELPHIA PA ASOS
0805 PM TSTM WND DMG LOWER MERION TWP 40.03N 75.29W
08/18/2011 MONTGOMERY PA 911 CALL CENTER
TREES DOWN.
0820 PM TSTM WND DMG LOWER GWYNEDD TWP 40.22N 75.29W
08/18/2011 MONTGOMERY PA 911 CALL CENTER
TREES DOWN.
0820 PM TSTM WND DMG UPPER GWYNEDD TWP 40.19N 75.24W
08/18/2011 MONTGOMERY PA 911 CALL CENTER
TREES DOWN.
0820 PM TSTM WND DMG MAPLE SHADE TWP 39.95N 74.99W
08/18/2011 BURLINGTON NJ 911 CALL CENTER
TREES AND WIRES DOWN.
0825 PM HAIL FORT WASHINGTON 40.14N 75.19W
08/18/2011 E1.00 INCH MONTGOMERY PA TRAINED SPOTTER
0825 PM TSTM WND DMG ABINGTON 40.12N 75.12W
08/18/2011 MONTGOMERY PA 911 CALL CENTER
TREES DOWN.
0825 PM TSTM WND DMG MOORESTOWN 39.97N 74.94W
08/18/2011 BURLINGTON NJ 911 CALL CENTER
TREES AND WIRES DOWN.
0835 PM HAIL HORSHAM 40.18N 75.13W
08/18/2011 E0.88 INCH MONTGOMERY PA TRAINED SPOTTER
0840 PM HAIL MOUNT LAUREL 39.93N 74.89W
08/18/2011 E0.75 INCH BURLINGTON NJ NWS EMPLOYEE
0850 PM HAIL FURLONG 40.30N 75.08W
08/18/2011 E0.75 INCH BUCKS PA TRAINED SPOTTER
0950 PM TSTM WND DMG CHESTER TWP 40.76N 74.68W
08/18/2011 MORRIS NJ 911 CALL CENTER
TREES DOWN.
1000 PM TSTM WND DMG MENDHAM TWP 40.80N 74.57W
08/18/2011 MORRIS NJ 911 CALL CENTER
TREES DOWN.
1020 PM TSTM WND DMG BRIDGETON 39.43N 75.23W
08/18/2011 CUMBERLAND NJ 911 CALL CENTER
TREES DOWN.
&&
EVENT NUMBER PHI1100527 PHI1100523 PHI1100524 PHI1100525 PHI1100526
PHI1100529 PHI1100528 PHI1100531 PHI1100532 PHI1100530 PHI1100533
PHI1100534 PHI1100535 PHI1100540 PHI1100541 PHI1100538 PHI1100536
PHI1100537 PHI1100545 PHI1100546 PHI1100539 PHI1100548 PHI1100549
PHI1100550 PHI1100552 PHI1100542 PHI1100551 PHI1100553 PHI1100547
PHI1100543 PHI1100544 PHI1100555 PHI1100554 PHI1100556
IOVINOSpecial weather statement, Aug 19, 12:02 AM EDT, 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1202 AM EDT FRI AUG 19 2011
DEZ001-MDZ008-PAZ067-070-190500-
CECIL MD-CHESTER PA-DELAWARE PA-NEW CASTLE DE-
1202 AM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL AFFECT CECIL...CHESTER...DELAWARE AND
NEW CASTLE COUNTIES...
AT 1155 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES SOUTHWEST
OF LANCASTER TO 22 MILES NORTHWEST OF BALTIMORE...MOVING EAST AT 20
MPH. THE THUNDERSTORMS WILL BE NEAR MOUNT VERNON...HOMEVILLE AROUND
1245 AM...CONOWINGO AND RICHARDSMERE AROUND 100 AM.
VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.
THIS LINE MAY EVENTUALLY CAUSE CONSIDERABLE POOR DRAINAGE FLOODING
AS IT MOVES TOWARD THE PHILADELPHIA WILMINGTON URBAN CORRIDOR.
LAT...LON 3973 7615 3978 7607 3987 7601 3992 7601
4000 7598 4004 7546 3944 7573 3945 7601
3946 7602 3953 7599 3955 7603 3954 7607
3956 7610 3969 7623 3972 7624
FORECASTER: DRAGSpecial weather statement, Aug 19, 12:19 AM EDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1219 AM EDT FRI AUG 19 2011
NJZ021>025-190500-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-
COASTAL ATLANTIC NJ-CUMBERLAND NJ-
1219 AM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...CAPE MAY AND
CUMBERLAND COUNTIES...
AT 1217 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES SOUTHWEST
OF ATLANTIC CITY TO 16 MILES SOUTH OF MILLVILLE...MOVING EAST AT 30
MPH. THE THUNDERSTORMS WILL BE NEAR SEAVILLE AROUND 1225 AM...
STRATHMERE...GOSHEN AROUND 1230 AM...SEA ISLE CITY AROUND 1235 AM...
WHITESBORO-BURLEIGH...CAPE MAY COURT HOUSE AROUND 1240 AM...SCOTCH
BONNET...NORTH WILDWOOD AROUND 1245 AM...STONE HARBOR AND AVALON
AROUND 1250 AM.
VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.
WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
LAT...LON 3928 7455 3925 7459 3920 7464 3912 7470
3907 7471 3900 7481 3908 7492 3911 7490
3916 7491 3918 7497 3918 7504 3921 7508
3937 7471 3930 7454
FORECASTER: DRAGSpecial weather statement, Aug 19, 12:50 AM EDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1250 AM EDT FRI AUG 19 2011
DEZ001-002-NJZ016-017-021-PAZ067-070-190530-
CHESTER PA-CUMBERLAND NJ-DELAWARE PA-GLOUCESTER NJ-KENT DE-
NEW CASTLE DE-SALEM NJ-
1250 AM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL AFFECT CHESTER...CUMBERLAND...
DELAWARE...GLOUCESTER...KENT...NEW CASTLE AND SALEM COUNTIES...
AT 1246 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 16 MILES NORTHWEST
OF WEST CHESTER TO 5 MILES NORTH OF WILMINGTON TO 5 MILES NORTHWEST
OF DOVER...MOVING EAST AT 15 MPH. THE THUNDERSTORMS WILL BE NEAR
MARSHALLTON...PENNSVILLE...WILMINGTON...EDGEMOOR AROUND 1255 AM...
LEIPSIC...BELLEFONTE...ARDENCROFT AROUND 100 AM...GLENMOORE...ELAM
AND HANCOCKS BRIDGE AROUND 105 AM.
VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.
WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
LAT...LON 4012 7553 3977 7516 3920 7509 3917 7512
3919 7518 3923 7518 3929 7527 3929 7532
3934 7535 3933 7537 3946 7555 3958 7554
3958 7556 3946 7558 3932 7543 3924 7538
3918 7540 3921 7562 3981 7566 4011 7595
FORECASTER: DRAGSpecial weather statement, Aug 19, 1:00 AM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
100 AM EDT FRI AUG 19 2011
DEZ001-002-MDZ008-012-015-190545-
CECIL MD-KENT MD-KENT DE-NEW CASTLE DE-QUEEN ANNE'S MD-
100 AM EDT FRI AUG 19 2011
...STRONG THUNDERSTORMS WILL AFFECT CECIL...KENT...NEW CASTLE AND
QUEEN ANNE'S COUNTIES...
AT 1255 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 23 MILES SOUTH OF
LANCASTER TO 17 MILES NORTH OF CENTERVILLE...MOVING SOUTHEAST AT 25
MPH. THE THUNDERSTORMS WILL BE NEAR CRUMPTON AROUND 105 AM...ROCK
SPRINGS AROUND 110 AM...CONOWINGO...RICHARDSMERE...OCTORARO...
SUDLERSVILLE AROUND 115 AM...PERRYVILLE...MILLINGTON AROUND 120 AM...
WEST NOTTINGHAM AND RISING SUN AROUND 125 AM.
VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.
ISOLATED WESTERLY WIND GUSTS OF 30 TO 40 MPH ARE POSSIBLE WITH THESE
STORMS.
LAT...LON 3973 7623 3972 7613 3963 7585 3938 7565
3920 7563 3904 7545 3923 7603 3937 7612
3938 7607 3945 7600 3946 7602 3953 7599
3956 7610 3969 7623
FORECASTER: DRAGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 8:11 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 64 min |
| Aug 18, 8:26 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 112 min |
| Aug 18, 8:31 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 59 min |
| Aug 18, 8:48 PM EDT | Special Weather Statement | PHI | Warren | 57 min |
| Aug 18, 8:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 57 min |
| Aug 18, 8:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 61 min |
| Aug 18, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset, Warren | 57 min |
| Aug 18, 9:53 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Salem | 67 min |
| Aug 18, 9:57 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 43 min |
| Aug 19, 12:19 AM EDT | Special Marine Warning | PHI | 26 min | |
| Aug 19, 12:19 AM EDT | Special Weather Statement | PHI | Cape May | 41 min |
| Aug 19, 12:50 AM EDT | Special Weather Statement | PHI | Cumberland, Salem | 40 min |
| Aug 19, 1:14 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 1 more | 3 hr |
| Aug 19, 1:31 AM EDT | Special Weather Statement | PHI | Cumberland, Gloucester, Salem | 59 min |
| Aug 19, 2:28 AM EDT | Special Weather Statement | PHI | Camden, Cumberland, Gloucester, Salem | 47 min |
| Aug 19, 2:48 AM EDT | Special Weather Statement | PHI | Monmouth, Ocean | 57 min |
| Aug 19, 3:06 AM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May, Cumberland | 114 min |
| Aug 19, 3:21 AM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth, Ocean | 114 min |
| Aug 19, 6:24 AM EDT | Special Weather Statement | PHI | Mercer, Middlesex | 36 min |
| Aug 19, 6:37 AM EDT | Special Weather Statement | PHI | Middlesex | 23 min |
| Aug 19, 1:34 PM EDT | Special Marine Warning | PHI | 41 min | |
| Aug 19, 2:39 PM EDT | Special Marine Warning | PHI | 96 min | |
| Aug 19, 3:23 PM EDT | Special Marine Warning | PHI | 67 min | |
| Aug 19, 4:05 PM EDT | Special Weather Statement | PHI | Camden | 55 min |
| Aug 19, 4:15 PM EDT | Special Marine Warning | PHI | 90 min | |
| Aug 19, 4:29 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 61 min |
| Aug 19, 4:32 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 2 hr |
| Aug 19, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 67 min |
| Aug 19, 4:42 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Aug 19, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Sussex, Warren | 78 min |
| Aug 19, 5:27 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 111 min |
| Aug 19, 5:29 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 50 min |
| Aug 19, 5:47 PM EDT | Special Marine Warning | PHI | 118 min | |
| Aug 19, 5:49 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 104 min |
| Aug 19, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Morris, Somerset | 80 min |
| Aug 19, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer, Salem | 65 min |
| Aug 19, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 28 min |
| Aug 19, 6:54 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 31 min |
| Aug 18, 8:08 PM EDT | Special Weather Statement | PHI | Berks | 67 min |
| Aug 19, 12:02 AM EDT | Special Weather Statement | PHI | Chester | 58 min |
| Aug 19, 4:00 AM EDT | Areal Flood Warning | PHI | Delaware | 4 hr |
| Aug 19, 1:46 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 59 min |
| Aug 19, 2:35 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 70 min |
| Aug 19, 2:38 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 3 hr |
| Aug 19, 2:57 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 3 hr |
| Aug 19, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 58 min |
| Aug 19, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 53 min |
| Aug 19, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 55 min |
| Aug 19, 5:39 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 3 hr |
| Aug 19, 5:42 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 48 min |
| Aug 19, 5:45 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 3 hr |
| Aug 18, 8:35 PM EDT | Special Weather Statement | PHI | Queen Anne's | 55 min |
| Aug 19, 1:44 AM EDT | Special Weather Statement | PHI | Cecil, Kent, Queen Anne's | 61 min |
| Aug 19, 4:09 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 66 min |
| Aug 19, 4:42 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 63 min |
| Aug 19, 4:53 PM EDT | Areal Flood Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's | 5 hr |
| Aug 19, 6:18 PM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 3 hr |
| Aug 19, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 69 min |
| Aug 19, 6:34 PM EDT | Areal Flood Advisory | PHI | Caroline | 2 hr |
| Aug 19, 1:20 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 85 min |
| Aug 19, 1:42 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 63 min |
| Aug 19, 2:09 PM EDT | Areal Flood Advisory | PHI | Sussex | 92 min |
| Aug 19, 2:33 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 7 hr |
| Aug 19, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Aug 19, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 61 min |
| Aug 19, 3:13 PM EDT | Special Weather Statement | PHI | Sussex | 92 min |
| Aug 19, 3:53 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 5 hr |
| Aug 19, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 82 min |
Nearby
Special Weather Statements in Maryland, 2011Every special weather statement in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.