Delaware, 2001

Hail and Damaging Wind in Delaware, June 11, 2001

June 11, 2001 · NWS PHI · 2 events in 1 county or zone

A severe thunderstorm knocked a few trees and several power lines across northern New Castle County. Dime to nickel size hail also fell in Wilmington.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What happened

The episode as NWS PHI wrote it up.

A severe thunderstorm knocked a few trees and several power lines across northern New Castle County. Dime to nickel size hail also fell in Wilmington. About 15,000 homes and businesses lost power.

What forecasters said that day

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 11, 3:48 PM EST, 5 hours 42 minutes earlier.

Area forecast discussion, Jun 11, 3:48 PM EST, 5 hours 42 minutes before
AREA FORECAST DISCUSSION...CORRECTED TYPO
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
320 PM EDT MON JUN 11 2001

RADAR SHOWING LINE OF TSRA/S STRETCHING FROM FINGER LAKES REGION OF
NY SW TO THE PA BORDER ATTM. EXPECT CONTINUED DEVELOPMENT ALONG THIS
LINE AS AFTERNOON PROGRESSES...AS S/W CONTINUES TO MOVE E. THE
GREATEST THREAT FOR TSRA WILL BE ACROSS NRN ZONES...CLOSER TO THE
S/W. MODELS A BIT SLOWER THAN PREV RUNS WITH ERN MOVEMENT OF S/W SO
WILL NOW HAVE PRECIP ENDING SHORTLY AFTER MIDNIGHT FROM NW-SE.

PREVIOUS ETA RUNS HAD ANOTHER S/W MOVING ACROSS NRN PORTIONS OF CWA
TUE AFTERNOON INTO TUE NIGHT. 12Z ETA NOW KEEPS THIS FEATURE FARTHER
N ACROSS SRN NEW ENGLAND. THIS IS CONSISTENT WITH THE AVN...AND WILL
THEREFORE REMOVE MENTION OF PRECIP DURING THIS PERIOD. HOWEVER...
WILL INTRODUCE A LOW CHC OF TSRA ACROSS NRN ZONES WED AFTERNOON AS A
VORT MAX MOVES SOUTHEAST OUT OF THE GREAT LAKES REGION.

THE MOST NOTICEABLE ASPECT OF THE WX THIS WEEK WILL BE THE
INCREASINGLY HUMID AIRMASS WHICH WILL SPREAD INTO THE REGION ON A SW
FLOW. TEMPS WILL RISE TO AROUND 90 IN PHL ON TUE AND WED. DPTS WILL
RISE FROM THE MID 60S ON TUE TO NEAR 70 ON WED WITH HEAT INDEX
VALUES APPROACHING 100 DEG AT TIMES. THIS HOWEVER REMAINS JUST BELOW
HEAT ADVISORY CRITERIA...BUT FUTURE SHIFTS WILL NEED TO
RE-EVALUATE.

REMNANTS OF ALLISON MAY SPREAD ACROSS CWA THU AND FRI...AND MAY ALSO
HELP TO KEEP TEMPS BELOW HEAT ADVISORY/WARNING CRITERIA FOR THE END
OF THE WORK-WEEK.

AS FOR TEMPS...HIGHS GENERALLY CLOSER TO THE WARMER MAV'S. ON
WED...H850 TEMPS ABOUT 2 DEG WARMER THAN ON TUESDAY...BUT THE
INCREASED CLOUD COVER SHOULD HELP TO KEEP TEMPvS SIMILAR BOTH DAYS.
ETA SOUNDINGS INDICATE FULL SUN HIGHS AT PHL OF 88 ON TUE AND 93 ON
WED. MINS GENERALLY ACCEPTED.

NOTHING ON THE MARINE.

.PHI...NONE.

JAQ/TFG

In the hours before

Special weather statement, Jun 11, 4:45 PM EST, 4 hours 45 minutes before
NJZ001-007>010-PAZ055-062-120300-

SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH 398 NATIONAL
WEATHER SERVICE MOUNT HOLLY NJ
545 PM EDT MON JUN 11 2001

...SEVERE THUNDERSTORM WATCH UNTIL 11 PM EDT...

THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA HAS ISSUED A SEVERE
THUNDERSTORM WATCH FOR PORTIONS OF NORTHEASTERN PENNSYLVANIA AND
NORTHERN NEW JERSEY UNTIL 11 PM EDT. THE FOLLOWING COUNTIES ARE
INCLUDED IN THE WATCH...

IN PENNSYLVANIA...MONROE AND NORTHAMPTON.
IN NEW JERSEY...SUSSEX...WARREN...MORRIS...HUNTERDON...AND SOMERSET.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THE WATCH AREA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES. FOR ADDITIONAL WEATHER INFORMATION...VISIT OUR
WEB SITE AT WWW.NWS.NOAA.GOV/ER/PHI (IN SMALL LETTERS).

SKYWARN ACTIVATION IS REQUESTED.

JAQ

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 thunderstorm wind, 1 hail. Local standard time, as filed.

Thunderstorm Wind, New Castle

When
June 11, 9:30 PM EST
Where
New Castle County, Yorklyn
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
39.750, -75.533

Hail, New Castle

When
June 11, 9:35 PM EST
Where
New Castle County, Wilmington
Measured
0.88 in hail
Reported by
GENERAL PUBLIC
Coordinates
39.817, -75.683

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Delaware in 2001Every state in 2001This day in weather historyWarnings in Delaware, June 2001

Sources

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: 5255183, 5253827.