Alert archive / Delaware / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 99, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2022, 3:44 PM EDT for New Castle County, Delaware; Chester County, Pennsylvania. It was in force for 46 min. 1 report 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, 2022, 3:44 PM EDT (19:44 UTC)
- Expired
- Jul 1, 2022, 4:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Chester County, PA
The radar
The Dover AFB radar (KDOX), 114 km from the middle of the area, began a volume at 19:45 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, 4:24 PM EDT | TSTM WND DMG | London Britain Twp, PA | MODERATE-SIZED TREE BRANCHES AND LIMBS DOWN ALONG GOOD HOPE ROAD BETWEEN ROUTE 896 AND FLINT HILL ROAD. TIME ESTIMATED VIA 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, 7.7 hours before the alert went out and 152 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
- 447 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 1260 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
404
WUUS51 KPHI 011944
SVRPHI
DEC003-PAC029-012030-
/O.NEW.KPHI.SV.W.0099.220701T1944Z-220701T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
344 PM EDT Fri Jul 1 2022
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern New Castle County in northern Delaware...
Southwestern Chester County in southeastern Pennsylvania...
* Until 430 PM EDT.
* At 344 PM EDT, a severe thunderstorm was located over Rock Springs,
or 13 miles north of Havre De Grace, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Newark, Oxford, West Grove, Homeville, Glen Roy, North Star,
Landenberg, Mount Vernon, Kemblesville, Pike Creek, Hockessin,
Avondale, Toughkenamon and Brookside.
This includes Interstate 95 in Delaware near mile marker 5.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3974 7612 3973 7610 3974 7609 3976 7606
3981 7603 3983 7604 3983 7602 3986 7600
3992 7575 3966 7568 3965 7579 3972 7579
3972 7613
TIME...MOT...LOC 1944Z 259DEG 28KT 3973 7618
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM2 follow-up statements
064
WWUS51 KPHI 012013
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
413 PM EDT Fri Jul 1 2022
DEC003-PAC029-012030-
/O.CON.KPHI.SV.W.0099.000000T0000Z-220701T2030Z/
New Castle DE-Chester PA-
413 PM EDT Fri Jul 1 2022
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHWESTERN NEW CASTLE AND SOUTHWESTERN CHESTER COUNTIES...
At 413 PM EDT, a severe thunderstorm was located near Kemblesville,
or 9 miles northwest of Newark, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Newark, Oxford, West Grove, Homeville, North Star, Landenberg, Mount
Vernon, Kemblesville, Pike Creek, Hockessin, Avondale, Toughkenamon
and Brookside.
This includes Interstate 95 in Delaware near mile marker 5.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3974 7597 3975 7596 3978 7597 3981 7603
3983 7604 3983 7602 3986 7600 3992 7575
3966 7568 3965 7579 3972 7579 3972 7597
TIME...MOT...LOC 2013Z 259DEG 28KT 3977 7589
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM173
WWUS51 KPHI 012020
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
420 PM EDT Fri Jul 1 2022
DEC003-PAC029-012030-
/O.EXP.KPHI.SV.W.0099.000000T0000Z-220701T2030Z/
New Castle DE-Chester PA-
420 PM EDT Fri Jul 1 2022
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NEW CASTLE AND
SOUTHWESTERN CHESTER COUNTIES WILL EXPIRE AT 430 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3974 7597 3975 7596 3978 7597 3981 7603
3983 7604 3983 7602 3986 7600 3992 7575
3966 7568 3965 7579 3972 7579 3972 7597
TIME...MOT...LOC 2020Z 259DEG 28KT 3978 7582
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 2:04 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 20 min |
| Jul 1, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 25 min |
| Jul 1, 3:38 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 18 min |
| Jul 1, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 32 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2022Severe Thunderstorm Warnings in Pennsylvania, 2022Every severe thunderstorm warning in 2022
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.