A slow moving cold front helped trigger a pair of severe thunderstorms over Queen Anne's County on the evening of the 23rd.
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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 slow moving cold front helped trigger a pair of severe thunderstorms over Queen Anne's County on the evening of the 23rd.
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 Jun 23, 2:20 PM EST, 4 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 320 PM EDT MON JUN 23 2008 .SYNOPSIS... A COLD FRONT EXTENDED ACROSS THE EASTERN GREAT LAKES REGION AND DOWN THE OHIO RIVER VALLEY THIS AFTERNOON. THE FRONT WILL MOVE TO THE EAST AND IT SHOULD PASS ACROSS EASTERN PENNSYLVANIA, NORTHEASTERN MARYLAND, DELAWARE AND NEW JERSEY TONIGHT. HIGH PRESSURE IS FORECAST TO BUILD IN BEHIND THE FRONT FOR TUESDAY NIGHT INTO WEDNESDAY. A WARM FRONT FROM THE SOUTHWEST IS EXPECTED TO LIFT SLOWLY THROUGH OUR REGION ON WEDNESDAY NIGHT AND THURSDAY. ANOTHER COLD FRONT FROM THE NORTHWEST IS SLATED TO ARRIVE ON SATURDAY NIGHT. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... AT 300 PM, SCATTERED SHOWERS AND THUNDERSTORMS EXTENDED ALONG OUR COASTAL COUNTIES FROM MONMOUTH IN NEW JERSEY TO SUSSEX IN DELAWARE. ADDITIONAL SHOWERS AND THUNDERSTORMS WERE DEVELOPING OVER WESTERN PENNSYLVANIA AND NORTHERN VIRGINIA AT MID AFTERNOON. WITH THE COLD FRONT AND UPPER LEVEL TROUGH APPROACHING FROM THE WEST, AND WITH THE INSTABILITY EXPECTED TO INCREASE OVER OUR REGION DURING THE LATE AFTERNOON AND EVENING HOURS, WE HAVE MAINTAINED THE MENTION OF SCATTERED SHOWERS AND THUNDERSTORMS INTO TONIGHT. LIFTED INDEX VALUES OF -4 TO -7 ARE POSSIBLE DURING THE NEXT SEVERAL HOURS ALONG WITH SURFACE BASED CAPES IN THE 1000 TO 1500 RANGE. THE STORM PREDICTION CENTER HAS KEPT OUR ENTIRE REGION IN ITS SLIGHT RISK AREA FOR SEVERE WEATHER. AS A RESULT, WE WILL CONTINUE TO MENTION THE POSSIBILITY OF HAIL AND GUSTY WINDS, ALONG WITH HEAVY RAIN AND DANGEROUS LIGHTNING INTO THIS EVENING. THE THUNDERSTORMS THAT HAVE OCCURRED FROM LATE THIS MORNING INTO THIS AFTERNOON IN OUR REGION HAVE BEEN OF THE PULSE VARIETY AND THAT SHOULD CONTINUE TO BE THE CASE INTO THIS EVENING. WITH THE LOSS OF DAYTIME HEATING, THE STRENGTH OF ANY THUNDERSTORMS SHOULD BEGIN TO DIMINISH A BIT. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/... THE UPPER LEVEL TROUGH THAT EXTENDED FROM THE EASTERN GREAT LAKES REGION TO THE TENNESSEE RIVER VALLEY THIS AFTERNOON SHOULD CONTINUE TO DRIFT TO THE EAST. THE AXIS OF THE TROUGH IS EXPECTED TO PASS OVERHEAD AROUND MIDDAY ON TUESDAY. WITH THE UPPER LEVEL FEATURE AND WITH SOME MARGINAL INSTABILITY LINGERING OVER OUR AREA, WE HAVE CONTINUED TO MENTION THE CHANCE FOR SHOWERS AND THUNDERSTORMS FOR TUESDAY. DRIER AIR WILL BUILD IN FROM THE WEST FOR TUESDAY NIGHT AND WEDNESDAY, RESULTING IN A MOSTLY CLEAR SKY. THE CENTER OF HIGH PRESSURE IS EXPECTED TO PASS OFF THE COAST ON WEDNESDAY. A RETURN FLOW OF MORE HUMID AIR WILL BECOME ESTABLISHED OVER OUR REGION BEGINNING ON WEDNESDAY NIGHT. WITH THE INCREASING HUMIDITY AND INSTABILITY ON THURSDAY, WE HAVE MAINTAINED THE MENTION OF A CHANCE FOR AFTERNOON SHOWERS AND THUNDERSTORMS. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... THE UPPER PATTERN IS FORECAST TO FLATTEN A BIT BY THE END OF THE WEEK. ANOTHER TROUGH IS ANTICIPATED TO DIG OVER THE NORTH CENTRAL STATES AND THE GREAT LAKES REGION OVER THE WEEKEND. THE TROUGH IS EXPECTED TO SET UP OVER THE EASTERN STATES FOR THE EARLY PART OF NEXT WEEK, KEEPING TEMPERATURES FROM GETTING EXCESSIVELY HOT. A WARM FRONT THAT IS EXPECTED TO LIFT THROUGH OUR REGION ON WEDNESDAY NIGHT AND THURSDAY MAY STALL JUST TO OUR NORTH FOR THURSDAY NIGHT INTO FRIDAY. AS A RESULT, WE WILL KEEP CHANCE POPS IN THE FORECAST. ANOTHER COLD FRONT FROM THE NORTHWEST IS SLATED TO ARRIVE ON SATURDAY NIGHT. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... VFR CONDITIONS ARE FORECAST TO PREVAIL OUTSIDE OF ANY SHOWERS AND THUNDERSTORMS FOR THE REST OF THIS AFTERNOON AND THIS EVENING. MORNING THUNDERSTORMS FORMED IN THE BEST INSTABILITY OVER SOUTHERN DELAWARE AND ALONG THE DELAWARE AND SOUTHEASTERN NEW JERSEY COASTAL WATERS THIS MORNING, BUT MOVED OFFSHORE BY MIDDAY. IT EARLIER SEEMED THAT THE INSTABILITY WAS MIGRATING NORTHWESTWARD, BUT AS OF 17Z THE AREAS THAT EXPERIENCED CONVECTION EARLIER WERE RETURNING TO LIFTED INDICES OF MINUS 7. THE HIGHER CLOUDS OVER OUR EASTERN AREAS APPEARED TO BE THINNING AND EDGING EASTWARD, AND THE CUMULUS FIELD JUST TO THE WEST OF THIS JET STREAM CIRRUS WAS GROWING. SO, THE THINKING CONTINUES THAT THUNDERSTORMS WILL BE SCATTERED AROUND THE AREA AS THE WEAK COLD FRONT APPROACHES THIS EVENING, AND OUR AREA IS UNDER THE RIGHT ENTRANCE REGION OF THE JET STREAK. SURFACE WINDS APPEARED TO BE WESTERLY OVER OUR WESTERN AREAS, AND SOUTHWEST TO SOUTH FURTHER EAST, ADDING TO CONVERGENCE OVER OUR CENTRAL AND SOUTHEASTERN ZONES. THE RUC WAS THE ONLY MODEL THAT RESOLVED THIS, AND IT SHOWS WESTERN AREAS RETURNING TO A SOUTH-SOUTHWEST DIRECTION DURING THIS AFTERNOON, WHICH WAS OCCURRING AT 18Z, BEFORE WINDS VEER TO WEST LATER TONIGHT. MANY AREAS WILL LIKELY JUST BE LIGHT OVERNIGHT, BUT WHERE A PREFERRED DIRECTION EXISTS, WEST WINDS SHOULD BE INDICATED. THESE LIGHT WINDS SHOULD ALSO LEAD TO AT LEAST A FEW OF THE TAF SITES DROPPING TO MARGINAL VFR VISIBILITIES IN FOG AND HAZE, AND WHILE DEW POINTS ARE SHOWN TO DROP A BIT TOWARD MORNING, A MORE SIGNIFICANT AIRMASS CHANGE WILL NOT REALLY OCCUR UNTIL LATER TUESDAY MORNING. SCATTERED CUMULUS WITH A 10 OR 12 KNOT WEST-NORTHWEST WIND ARE FORECAST TO PREVAIL TUESDAY. FOR THE OUTLOOK PERIOD BEYOND 18Z TUESDAY...CONDITIONS SHOULD BE VFR THROUGH THE MIDDLE OF THE WEEK WITH THE ARRIVAL OF HIGH PRESSURE TO THE REGION, OUTSIDE OF EARLY MORNING FOG. LOWER CONDITIONS AND SCATTERED PRECIPITATION MAY RETURN AS A WARM FRONTAL BOUNDARY IMPACTS THE REGION THURSDAY INTO FRIDAY. && .MARINE... CONDITIONS ARE FORECAST TO REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA THROUGH THE FORECAST PERIOD. THE LOOSE GRADIENT AHEAD OF THE APPROACHING WEAK COLD FRONT FOR TONIGHT IS NOT FORECAST TO GENERATE 25 KNOTS OR 5 FOOT SEAS, AT LEAST OUTSIDE OF CONVECTION, AND WAVEWATCH HANDLES THIS NICELY WITH 3 FOOT SEAS FORECAST FOR BUOY 44009. A LIGHT WEST TO WEST-NORTHWEST FLOW TUESDAY SHOULD RETURN TO SOUTHWEST OR SOUTH AS THE WEEK WEARS ON, BUT AGAIN, SPEEDS SHOULD REMAIN BELOW CRITERIA AS WEAK HIGH PRESSURE PREVAILS. A WARM FRONT APPROACHING LATER THIS WEEK MAY IMPACT MARINE CONDITIONS, AND MODEL GUIDANCE WILL BE MONITORED FOR ANY CHANGES IF THE FLOW BECOMES MORE SOUTHEAST AND INCREASES. WAVEWATCH HAS BEEN HABITUALLY RAMPING SEAS UP TO 5 FEET TOWARD THE END OF ITS FORECAST CYCLE FOR THE PAST SEVERAL DAYS, AND DOES SO AGAIN FOR SATURDAY NIGHT AND SUNDAY. FOR NOW, SEAS WILL BE KEPT UNDER 5 FEET THROUGHOUT. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS/NEAR TERM/SHORT TERM/LONG TERM...IOVINO
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 430 PM EDT MON JUN 23 2008 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055- 060>062-067>071-241000- NEW CASTLE-KENT DE-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-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-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON- CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- 430 PM EDT MON JUN 23 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN PENNSYLVANIA AND NEW JERSEY, DELAWARE AND NORTHEASTERN MARYLAND. .DAY ONE...THIS EVENING AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED INTO TONIGHT. SOME OF THE THUNDERSTORMS THIS EVENING MAY BE ACCOMPANIED BY STRONG WIND GUSTS AND HAIL, ALONG WITH HEAVY RAIN AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. ANZ430-431-450>455-241000- 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- 430 PM EDT MON JUN 23 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COASTAL WATERS OF NEW JERSEY AND DELAWARE AND FOR DELAWARE BAY. .DAY ONE...THIS EVENING AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED INTO TONIGHT. SOME OF THE THUNDERSTORMS THIS EVENING MAY BE ACCOMPANIED BY STRONG WIND GUSTS AND HAIL, ALONG WITH HEAVY RAIN AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 216 PM EDT MON JUN 23 2008 NJZ021>023-231915- ATLANTIC-CAPE MAY-CUMBERLAND- 216 PM EDT MON JUN 23 2008 ...STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...CAPE MAY AND CUMBERLAND COUNTIES... AT 215 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM BETWEEN VINELAND AND BUENA...AND ANOTHER STRONG THUNDERSTORM OVER DELAWARE BAY SOUTH OF NEWPORT. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 20 MPH. THE NORTHERNMOST THUNDERSTORM WILL BE NEAR MIZPAH AROUND 215 PM...MAYS LANDING...FOLSOM AROUND 230 PM AND ELWOOD AROUND 245 PM. VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. WIND GUSTS TO 40 MPH...SMALL HAIL AND DANGEROUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE WITH THESE STORMS. NIERENBERG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 312 PM EDT MON JUN 23 2008 NJZ022-025-232015- ATLANTIC-COASTAL ATLANTIC- 312 PM EDT MON JUN 23 2008 ...A STRONG THUNDERSTORM WILL AFFECT ATLANTIC COUNTY... AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 13 MILES WEST OF ATLANTIC CITY...MOVING EAST AT 20 MPH. THE THUNDERSTORM WILL BE NEAR ABSECON...PLEASANTVILLE AROUND 330 PM AND ATLANTIC CITY AROUND 345 PM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. WIND GUSTS TO 40 MPH, SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE WITH THIS STORM. NIERENBERG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 712 PM EDT MON JUN 23 2008 MDZ012-015-240015- KENT-QUEEN ANNES- 712 PM EDT MON JUN 23 2008 ...A STRONG THUNDERSTORM WILL AFFECT KENT AND QUEEN ANNES COUNTIES... AT 711 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR CAPE ST. CLAIR...MOVING EAST AT 25 MPH. THE THUNDERSTORM WILL BE NEAR OVERTON...CENTREVILLE AROUND 730 PM...CARVILLE...HOPE AROUND 745 PM...SUDLERSVILLE AND GALENA AROUND 800 PM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. EXPECT INTENSE LIGHTNING FROM THIS STORM. DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. NIERENBERG
The Dover AFB radar (KDOX), 69 km away, was scanning. The volume nearest the first event began at 23:33 UTC.
2 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm tore down a couple of trees and wires in Grasonville.
Another severe thunderstorm tore down a few more trees and wires in Queen Anne's County around Centreville.
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, June 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: 114607, 114608.