Alert archive / Delaware / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 224, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 26, 2021, 1:05 AM EDT for Kent County, New Castle County, Delaware; Kent County, Queen Anne's County, Maryland. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2021, 1:05 AM EDT (05:05 UTC)
- Expired
- Jul 26, 2021, 1:45 AM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 05:06 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 5.1 hours before the alert went out and 142 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
- 1389 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1315 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.3
The text
As transmitted.
702
WUUS51 KPHI 260505
SVRPHI
DEC001-003-MDC029-035-260545-
/O.NEW.KPHI.SV.W.0224.210726T0505Z-210726T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
105 AM EDT Mon Jul 26 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northwestern Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northeastern Kent County in northeastern Maryland...
* Until 145 AM EDT.
* At 105 AM EDT, a severe thunderstorm was located over Massey, or 11
miles southwest of Middletown, moving southeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Clayton, Millington, Sudlersville, Hartly, Sassafras, Delaney
Corner, Massey, Galena and Kenton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3937 7590 3936 7589 3937 7585 3938 7582
3938 7577 3925 7559 3915 7571 3915 7588
3936 7593
TIME...MOT...LOC 0505Z 330DEG 13KT 3931 7583
HAIL...<.75IN
WIND...60MPH
$$
BAH2 follow-up statements
102
WWUS51 KPHI 260530
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
130 AM EDT Mon Jul 26 2021
DEC001-003-MDC029-035-260545-
/O.CON.KPHI.SV.W.0224.000000T0000Z-210726T0545Z/
New Castle DE-Kent DE-Queen Anne's MD-Kent MD-
130 AM EDT Mon Jul 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM EDT
FOR SOUTHWESTERN NEW CASTLE...NORTHWESTERN KENT...NORTHEASTERN QUEEN
ANNE'S AND NORTHEASTERN KENT COUNTIES...
At 130 AM EDT, a severe thunderstorm was located near Millington, or
14 miles west of Dover, moving southeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Clayton, Millington, Hartly, Sassafras, Delaney Corner, Massey and
Kenton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3935 7586 3937 7584 3938 7582 3938 7577
3926 7560 3917 7571 3920 7585
TIME...MOT...LOC 0530Z 330DEG 13KT 3923 7577
HAIL...<.75IN
WIND...60MPH
$$
BAH685
WWUS51 KPHI 260536
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
136 AM EDT Mon Jul 26 2021
DEC001-003-MDC029-035-260545-
/O.EXP.KPHI.SV.W.0224.000000T0000Z-210726T0545Z/
New Castle DE-Kent DE-Queen Anne's MD-Kent MD-
136 AM EDT Mon Jul 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE...
NORTHWESTERN KENT...NORTHEASTERN QUEEN ANNE'S AND NORTHEASTERN KENT
COUNTIES WILL EXPIRE AT 145 AM 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.
LAT...LON 3935 7586 3937 7584 3938 7582 3938 7577
3926 7560 3917 7571 3920 7585
TIME...MOT...LOC 0535Z 325DEG 11KT 3925 7572
$$
BAHThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 12:38 AM EDT | Special Weather Statement | PHI | New Castle | 52 min |
| Jul 26, 12:40 AM EDT | Special Weather Statement | PHI | Kent | 50 min |
| Jul 26, 3:24 PM EDT | Special Weather Statement | PHI | Talbot | 51 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2021Severe Thunderstorm Warnings in Maryland, 2021Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.