Scattered thunderstorms that moved along a stationary front affected the Eastern Shore during the evening of the 1st.
Every event with a place to put it. 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.
Scattered thunderstorms that moved along a stationary front affected the Eastern Shore during the evening of the 1st.
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 Sep 1, 5:23 PM EST, 1 hour 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 623 PM EDT SAT SEP 1 2012 .SYNOPSIS... A COLD FRONT JUST TO OUR SOUTH WILL STALL ACROSS VIRGINIA FOR TONIGHT AND SUNDAY AS HIGH PRESSURE BUILDS OVER SOUTHEASTERN CANADA AND NORTHERN NEW ENGLAND. THE FRONT IS FORECAST TO REMAIN NEARLY STATIONARY FROM MONDAY THROUGH THURSDAY AS WEAK AREAS OF LOW PRESSURE MOVE ALONG IT. THE FINAL LOW WILL PULL THE FRONT AWAY FROM OUR AREA BY THE END OF THE WORK WEEK. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... A COLD FRONT OVER THE DELMARVA WILL MOVE A BIT FURTHER SOUTH BEFORE STALLING TONIGHT AND SUNDAY. THERE WERE SOME SHOWERS ACROSS SRN DELAWARE AND ERN MD EARLIER...BUT THESE HAVE MOVED AWAY. OTHER ISOLATED TO SCATTERED SHOWERS MAY DEVELOP ACROSS THE DELMARVA THIS EVENING...SO SLGT CHC OR SMALL CHC POPS WERE KEPT IN FOR THE EVENING. LOW TEMPERATURES TONIGHT WILL RANGE FROM THE LOW 60S UP NORTH TO AROUND 70 ON THE DELMARVA AND ERN NJ. WINDS WILL BE LIGHT FROM THE N SWITCHING AROUND TO E BY MORNING. PATCHY LIGHT FOG IS POSSIBLE LATE TONIGHT. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/... HIGH PRESSURE WILL BE BUILDING ACROSS SRN CANADA ON SUNDAY WHILE THE DEEPER MOISTURE FROM FORMER TROPICAL SYSTEM ISAAC ARRIVES FROM THE WEST. CLOUDS WILL STEADILY INCREASE AND LOWER DURING THE DAY. SCATTERED SHOWERS WILL ARRIVE DURING THE AFTERNOON WITH 30-40 PCT POPS WEST AND SOUTH AND 20-30 PCT POPS NORTH AND EAST. QPF LIGHT. HIGHS ON SUNDAY WILL MOSTLY BE IN THE LOW TO MID 80S...WITH A FEW UPPER 80 ACROSS SRN DELAWARE. && .LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/... MUCH OF THE PERIOD STILL LOOKS LIKE IT WILL BE UNSETTLED. THE BOUNDARY THAT SETS UP NEAR OUR AREA, AS NOTED PREVIOUSLY, WILL ACT AS A FOCUS FOR MOISTURE AND ENERGY THAT WILL MAKE UP THE REMNANTS OF ISSAC. THESE REMNANT SYSTEMS CAN CARRY A FAIR AMOUNT OF VORTICITY THAT ON OCCASION TRANSLATES INTO VERY LOCALIZED SEVERE WEATHER, BUT WE ARE MUCH TOO FAR OUT TO HIT THAT VERY HARD. THE MOISTURE SHOULD BE FAIRLY CONSIDERABLE, AND ALSO AS NOTED PREVIOUSLY THERE COULD BE SOME LOCALLY HEAVY RAIN. THAT MOISTURE AND ENERGY LOOK LIKE THEY WILL CLEAR OUR AREA BY AROUND WEDNESDAY, BUT A TRAILING MID LEVEL TROUGH WILL KEEP US UNDER THE THREAT OF SHOWER AND THUNDERSTORM ACTIVITY INTO THURSDAY. WE STILL FORECAST IMPROVING CONDITIONS FOR THE END OF THE WORK WEEK INTO THE WEEKEND. OUR PRESENT LONG TERM TEMPERATURE FORECAST CALLS FOR DAYTIME TEMPERATURES TO BE AROUND NORMAL AND NIGHTTIME TEMPERATURES TO BE ABOVE NORMAL WHILE THE REMNANTS OF ISSAC AFFECT OUR AREA, AND AFTER THAT THEY ARE FORECAST TO SLOWLY SETTLE TO NEAR OR SLIGHTLY BELOW NORMAL. && .AVIATION /22Z SATURDAY THROUGH THURSDAY/... THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY AND SURROUNDING AREAS. VFR CONDITIONS ARE EXPECTED THE REST INTO TONIGHT. HIGH AND SOME MID LEVEL CLOUDS WILL BE ACROSS THE AREA BEHIND THE COLD FRONT CROSSING THE AREA. WINDS...WHICH ARE MOSTLY NW OR N TODAY WILL CONTINUE TO VEER TO NE OR E TONIGHT AND THEN CONTINUE E OR SE ON SUNDAY. LATER TONIGHT...PATCHY MVFR FOG (5SM) WAS KEPT IN THE TAFS (FROM EARLIER). SUNDAY...AFTER ANY LIGHT FOG DISSIPATES DURING THE MORNING...THEN VFR CONDITIONS EXPECTED THE REST OF THE DAY. CLOUDS WILL INCREASE AS MOISTURE FROM FORMER TROPICAL SYSTEM ISAAC BEGINS TO MOVE IN FROM THE WEST. ISOLATED TO SCATTERED SHOWERS MAY ARRIVE LATER DURING THE AFTERNOON...BUT HAVE NOT BEEN INCLUDED IN ANY OF THE TAFS ATTM. OUTLOOK... SUNDAY NIGHT THROUGH THURSDAY...AT LEAST SCATTERED SHOWERS AND THUNDERSTORMS WITH THE POTENTIAL FOR BRIEF PERIODS OF HEAVY RAIN AND MVFR OR IFR CONDITIONS. MVFR OR IFR CONDITIONS ARE ALSO POSSIBLE IN LATE NIGHT AND EARLY MORNING FOG, HAZE AND LOW CLOUDS. && .MARINE... NO HAZARDS ARE EXPECTED TONIGHT OR SUNDAY. WINDS BEHIND THE COLD FRONT...WHICH MOVED ACROSS THE WATERS EARLIER...HAVE SWITCHED TO A NW OR N DIRECTION. AS HIGH PRESSURE BUILDS ACROSS CANADA AND THE FRONT STALLS TO THE SOUTH...WINDS SHOULD CONTINUE TO SWING AROUND TO NE THEN E BY DAWN. WIND SPEEDS SHOULD REMAIN AROUND 10 KNOTS OR LESS. THE PRESSURE GRADIENT ACROSS THE WATERS WILL INCREASE SLIGHTLY ON SUNDAY...SO WINDS COULD INCREASE TO 10 TO 15 KTS THEN. WIND DIRECTION ON SUNDAY WILL BE SE OR E MUCH OF THE DAY. THERE MAY BE A FEW ISOLATED SHOWERS LATE THIS AFTERNOON OR EARLY EVENING ACROSS THE DEL BAY AND SRN COASTAL WATERS. AS MOISTURE AND THE REMNANTS OF ISAAC MOVE TOWARD THE AREA LATER SUNDAY...THERE WILL BE OTHER OPPORTUNITIES FOR SCATTERED SHOWERS. OUTLOOK... ALTHOUGH WINDS ARE EXPECTED TO REMAIN BELOW ADVISORY CRITERION THROUGH THURSDAY, SWELLS ASSOCIATED WITH THE TROPICAL CYCLONE LESLIE LIKELY WILL CAUSE SWELLS OF ADVISORY CRITERION BY TUESDAY THAT LAST INTO AT LEAST THURSDAY. && .RIP CURRENTS... FAIRLY MINOR SWELLS FROM KIRK AND THEN SOMEWHAT MORE ROBUST SWELLS FROM LESLIE SHOULD KEEP US IN AT LEAST A MODERATE RISK OF RIP CURRENTS FOR THE UPCOMING WEEK. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS...DELISI/IOVINO NEAR TERM...NIERENBERG/O'HARA SHORT TERM...O'HARA LONG TERM...DELISI/IOVINO AVIATION...DELISI/IOVINO/NIERENBERG/O'HARA MARINE...DELISI/O'HARA RIP CURRENTS...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 313 PM EDT SAT SEP 1 2012 DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027- PAZ054-055-060>062-067>071-021915- NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON- CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- 313 PM EDT SAT SEP 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. LOCALLY HEAVY RAIN IS POSSIBLE SOMETIME IN THE MONDAY THROUGH WEDNESDAY TIME FRAME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ004-NJZ014-024>026-021915- DELAWARE BEACHES-EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY- COASTAL ATLANTIC-COASTAL OCEAN- 313 PM EDT SAT SEP 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE...CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS THE POTENTIAL FOR A MODERATE TO HIGH RISK OF RIP CURRENTS FOR MUCH OF THE PERIOD FROM SUNDAY THROUGH FRIDAY. LOCALLY HEAVY RAIN IS POSSIBLE SOMETIME IN THE MONDAY THROUGH WEDNESDAY TIME FRAME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-021915- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- 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- 313 PM EDT SAT SEP 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
729 PM EDT SAT SEP 1 2012
MDZ012-015-019-020030-
KENT MD-QUEEN ANNE'S MD-TALBOT MD-
729 PM EDT SAT SEP 1 2012
...STRONG THUNDERSTORMS WILL AFFECT KENT...QUEEN ANNE'S AND TALBOT
COUNTIES...
AT 723 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES NORTHEAST OF
BALTIMORE TO 25 MILES SOUTH OF BALTIMORE...MOVING SOUTHEAST AT 25
MPH. THE THUNDERSTORMS WILL BE NEAR ROMANCOKE...CHESTER AROUND 745
PM...TALBOT...OVERTON AROUND 800 PM...CHESTERTOWN...NEWTOWN AROUND
815 PM AND KINGSTOWN AROUND 830 PM.
FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
ANYONE WHO IS OUTDOORS THIS HOLIDAY WEEKEND SHOULD FIND SHELTER
IMMEDIATELY AT THE FIRST SIGN OF THREATENING WEATHER. DO NOT SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES.
VERY HEAVY RAIN COULD FALL FROM THESE STORMS...AND WILL CAUSE WATER
TO POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS. WIND GUSTS
BETWEEN 30 AND 35 MPH ARE POSSIBLE WITH THESE STORMS, MOST LIKELY
NEAR THE BAY
LAT...LON 3904 7632 3899 7627 3900 7618 3903 7625
3917 7629 3934 7617 3934 7616 3930 7604
3872 7602 3882 7632 3887 7625 3881 7621
3882 7620 3893 7623 3894 7624 3890 7625
3892 7628 3889 7627 3890 7632 3885 7639
TFGThe Dover AFB radar (KDOX), 77 km away, was scanning. The volume nearest the first event began at 00:06 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a home in Rock Hall. No injuries were reported. Lightning also caused about 170 Delmarva Power customers to lose power in Kent County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2012Every state in 2012This day in weather historyWarnings in Maryland, September 2012
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: 412194.