Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jul 1, 2021, 2:51 PM EDT for Chester County, Montgomery County, Pennsylvania. It was in force for 39 min. 7 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 1, 2021, 2:51 PM EDT (18:51 UTC)
- Expired
- Jul 1, 2021, 3:30 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Chester County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 18:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 1, 3:13 PM EDT | TSTM WND DMG | 4 Nne West Sadsbury Twp, PA | DOWNED TREE ON LAMMEY ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:21 PM EDT | TSTM WND DMG | 2 Nnw Geryville, PA | DOWNED WIRES NEAR ELM ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:21 PM EDT | TSTM WND DMG | 2 Wnw Caln Twp, PA | DOWNED TREE ON FISHERVILLE ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:23 PM EDT | TSTM WND DMG | 2 Sw Gilbertsville, PA | MPING REPORT OF DOWNED TREE LIMBS AND POWER LINES NEAR ROUTE 100. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:26 PM EDT | TSTM WND DMG | 1 N Coatesville, PA | DOWNED TREES AND WIRES NEAR VALLEY STATION ROAD IN COATESVILLE. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:27 PM EDT | TSTM WND DMG | 1 Ne Thorndale, PA | DOWNED TREE ON BEAVER RUN ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 3:31 PM EDT | TSTM WND DMG | 1 W Chester Springs, PA | DOWNED WIRES NEAR HORSESHOE TRAIL. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.9 hours before the alert went out and 188 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
- 604 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted.
867
WWUS81 KPHI 011851
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
251 PM EDT Thu Jul 1 2021
DEZ001-PAZ060-061-070-101>103-105-011930-
New Castle-Upper Bucks-Lehigh-Western Montgomery-Delaware-Western
Chester-Eastern Chester-Berks-
251 PM EDT Thu Jul 1 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN NEW CASTLE...
SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...NORTHWESTERN MONTGOMERY...
WEST CENTRAL BUCKS...CHESTER AND WEST CENTRAL DELAWARE COUNTIES...
At 251 PM EDT, a strong thunderstorm was located over New Morgan, or
9 miles south of Reading, moving east at 55 mph.
Wind gusts up to 50 mph and pea size hail are possible with this
storm.
Locations impacted include...
Reading, West Chester, Pottstown, Phoenixville, Coatesville, Emmaus,
Westtown, Wyomissing, Downingtown, Kennett Square, Birdsboro,
Collegeville, Oxford, Royersford, Laureldale, Parkesburg, Trappe,
East Greenville, West Grove and Honey Brook.
This includes the following highways...
Pennsylvania Turnpike between mile markers 296 and 324.
Northeast Extension between mile markers 37 and 52.
Interstate 78 in Pennsylvania between mile markers 61 and 62.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 3976 7606 3987 7599 3995 7600 4004 7593
4011 7594 4014 7588 4023 7602 4036 7598
4057 7541 4021 7537 4018 7541 4016 7540
4011 7543 4010 7546 4009 7544 3972 7565
3972 7613
TIME...MOT...LOC 1851Z 249DEG 49KT 4020 7591
$$
DavisThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:37 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 38 min |
| Jun 30, 8:56 PM EDT | Special Marine Warning | PHI | 94 min | |
| Jun 30, 9:05 PM EDT | Special Weather Statement | PHI | Somerset | 40 min |
| Jun 30, 9:21 PM EDT | Special Weather Statement | PHI | Salem | 39 min |
| Jun 30, 9:49 PM EDT | Special Weather Statement | PHI | Monmouth | 26 min |
| Jun 30, 9:51 PM EDT | Special Marine Warning | PHI | 60 min | |
| Jul 1, 2:58 AM EDT | Small Craft Advisory | PHI | 17 hr | |
| Jul 1, 1:10 PM EDT | Special Weather Statement | PHI | Monmouth | 50 min |
| Jul 1, 1:16 PM EDT | Special Weather Statement | PHI | Atlantic | 29 min |
| Jul 1, 1:28 PM EDT | Special Marine Warning | PHI | 62 min | |
| Jul 1, 1:31 PM EDT | Special Weather Statement | PHI | Cumberland | 29 min |
| Jul 1, 4:21 PM EDT | Special Marine Warning | PHI | 114 min | |
| Jul 1, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Salem and 1 more | 48 min |
| Jul 1, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Cape May, Cumberland, Salem | 80 min |
| Jul 1, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more | 46 min |
| Jul 1, 5:02 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 28 min |
| Jul 1, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more | 93 min |
| Jul 1, 5:35 PM EDT | Tornado Warning | PHI | Mercer, Monmouth, Ocean | 25 min |
| Jul 1, 5:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jul 1, 5:46 PM EDT | Special Marine Warning | PHI | 119 min | |
| Jul 1, 6:13 PM EDT | Special Marine Warning | PHI | 92 min | |
| Jun 30, 8:16 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 44 min |
| Jul 1, 3:13 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 47 min |
| Jul 1, 3:23 PM EDT | Areal Flood Advisory | PHI | Chester, Montgomery | 77 min |
| Jul 1, 3:48 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 112 min |
| Jul 1, 3:50 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 40 min |
| Jul 1, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 52 min |
| Jul 1, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 52 min |
| Jul 1, 4:10 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 94 min |
| Jul 1, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 43 min |
| Jul 1, 4:57 PM EDT | Tornado Warning | PHI | Kent, Sussex | 22 min |
| Jul 1, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 48 min |
| Jul 1, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 48 min |
| Jul 1, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 49 min |
Nearby
Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.