Thunderstorm Wind, Berks
- When
- July 1, 12:35 PM EST
- Where
- Berks County, Hamburg
- Measured
- 50 kt (58 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.550, -75.983
Damaging Wind in Pennsylvania, July 1, 2001
A severe thunderstorm knocked down trees and power lines in and around Hamburg.
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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 down trees and power lines in and around Hamburg.
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 Jul 1, 10:15 AM EST, 2 hours 20 minutes earlier.
Area forecast discussion, Jul 1, 10:15 AM EST, 2 hours 20 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1115 AM EDT SUN JUL 1 2001
GOODNESS...IT/S THERMODYNAMICALLY RIPE AROUND HERE. SOUNDINGS FROM
OKX AND LWX BOTH HAVE PWATER VALUES ABOVE 1.5 INCHES AND CAPES ABOVE
2000 J/KG. DON/T EXPECT ANY MORE WARM AIR OR MOISTURE INTO AREA AT
LOWER LEVELS GIVEN SFC AND H8 ANALYSES...BUT THERE/S ENOUGH AND NEW ETA
SUGGESTS WITH SOME BACKING OF THE WIND ABOVE H7 AT 18Z THAT IT COULD
DESTABILIZE MORE.
INITIALLY...THE BEST DYNAMICS APPEAR N OF FA...BUT EVENTUALLY WE ARE
RATHER CLOSE TO THE RIGHT REAR QUAD OF AN UPPER JET AND WE ALREADY
SEE SOME H5 DIFLUENCE PER ANALYSIS. THERE IS SOME...BUT NOT AN
ABUNDANCE OF...SPEED AND DIRECTIONAL SHEAR FROM THE SFC TO H7 (MAYBE
15 TO 20 KTS OF SPEED SHEAR AND 30 DEG OF DIRECTIONAL SHEAR).
WE CAN SEE THE CONVECTION LINES ESTABLISHING THEMSELVES FROM UPSTATE
NY INTO NWRN PA AT 11 AM ON RADAR...AND THEY ARE INCREASINGLY ACTIVE
WITH REGARDS TO LIGHTNING GIVEN THE LDS. EXPECT THEM TO PROPOGATE
DOWN INTO OUR AIR MASS THIS AFTERNOON AND EVENING. WITH PLENTY OF
THERMODYNAMIC AND SOME DYNAMIC ENERGY...HAVE PUT THE WORDING FOR THE
CONVECTION AHEAD OF THE WORDING FOR THE HEAT IN THE FCST. SINCE WE
ARE CLOSE TO CONVECTIVE TEMPS ALREADY...HAVE NOT TRIED TO TIME TSTM
DEVELOPMENT...HOWEVER HAVE APPLIED TIMING TO POTENTIALLY SEVERE WX.
MASSAGED SOME TEMPS A LTL BASED ON CURRENT READINGS...MAINLY DOWN A
LTL FAR NW AS CLOUDS ARE THERE AND MPO SEEMS HARD PRESSED TO REACH
THE 80S...AND UP A LTL ALONG THE COAST AS LOW LVL FLOW LOOKS STRONG
ENOUGH TO ALLOW TEMPS THERE NEAR 90. DID NOT CHANGE THE URBAN HEAT
WARNING OR THE HEAT ADVISORY.
SML CRAFT HEADLINE CONTD FOR TNGT AND MON.
.PHI...URBAN HEAT WRNG TDA PA67-71 NJ15/17-19 DE1
HEAT ADVY TDA NJ16/21-23 MD8/12/15/19/20 DE2-3
MPDIn the hours before
Special weather statement, Jul 1, 11:13 AM EST, 1 hour 22 minutes before
DEZ001-NJZ001-007>010-015>019-PAZ054-055-060>062-067>071-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1213 PM EDT SUN JUL 1 2001 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 600 PM EDT... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 600 PM EDT FOR THE FOLLOWING LOCATIONS: IN PENNSYLVANIA BERKS...BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON...PHILADELPHIA. IN NEW JERSEY BURLINGTON...CAMDEN...GLOUCESTER...HUNTERDON...MERCER...MORRIS... SALEM...SOMERSET...SUSSEX...WARREN. IN DELAWARE NEW CASTLE. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF THUNDERSTORMS WHICH CONTAIN DAMAGING WIND IN EXCESS OF 55 MPH AND HAIL 3/4 INCH OR GREATER IN DIAMETER IN AND CLOSE TO THE WATCH AREA. FREQUENT LIGHTNING AND VERY HEAVY RAIN MAY ALSO ACCOMPANY ANY THUNDERSTORMS. SKYWARN ACTIVATION IS REQUESTED. MPD
The radar
The Philadelphia radar (KDIX), 149 km away, was scanning. The volume nearest the first event began at 17:37 UTC.
Event by event
1 thunderstorm wind. Local standard time, as filed.
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Drought in Michigan, July 1 to 31, 2001
- Heat in Pennsylvania, July 1, 2001
- Rip Current in Michigan, July 1, 2001
- Damaging Winds and Lightning Strikes in Maryland, July 1, 2001
- Hail and Damaging Winds in New York, July 1, 2001
- Tropical Storm in Guam, July 1 to 3, 2001
- Flash Flooding and Hail in Texas, July 1, 2001
- Wildfire in Alaska, July 1 to 7, 2001
- Hail and Damaging Winds in Massachusetts, July 1, 2001
- Tornado in Florida, July 1, 2001
- Flood in Minnesota, July 1 to 31, 2001
- Damaging Winds and Lightning Strike in West Virginia, July 1, 2001
More
Every storm in Pennsylvania in 2001Every state in 2001This day in weather historyWarnings in Pennsylvania, July 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: 5260079.