Alert archive / Delaware / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 248, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2023, 11:00 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 60 min. 2 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 28, 2023, 11:00 PM EDT (03:00 UTC)
- Expired
- Jul 29, 2023, 12:00 AM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 28 km from the middle of the area, began a volume at 02:59 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 28, 11:20 PM EDT | TSTM WND GST 51 | 5 W Seaford, DE | DEOS Seaford - Oak Grove site measured 51 mph. |
| Jul 28, 11:43 PM EDT | TSTM WND DMG | 2 Nne Delaware Coastal, DE | Corrects time of previous tstm wnd dmg report from 2 NNE Delaware Coastal Airport. Power lines down per 911 call center. 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.0 hours before the alert went out and 82 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
- 3118 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 11.4
The text
As transmitted.
639
WUUS51 KPHI 290300
SVRPHI
DEC001-005-MDC011-290400-
/O.NEW.KPHI.SV.W.0248.230729T0300Z-230729T0400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1100 PM EDT Fri Jul 28 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southeastern Kent County in central Delaware...
Southeastern Caroline County in eastern Maryland...
* Until midnight EDT.
* At 1100 PM EDT, a severe thunderstorm was located near Hurlock,
moving northeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Lewes,
Federalsburg, Milton, Bridgeville, Delmar, Preston, Ellendale,
Henlopen Acres, Smithville, Cape Henlopen State Park, Agner,
Sycamore, Big Stone Beach, Long Neck and Blades.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 3846 7560 3846 7569 3864 7571 3869 7577
3868 7580 3870 7580 3871 7584 3868 7596
3869 7595 3901 7532 3868 7493 3845 7559
TIME...MOT...LOC 0300Z 239DEG 37KT 3861 7579
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB3 follow-up statements
449
WWUS51 KPHI 290316
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1116 PM EDT Fri Jul 28 2023
DEC001-005-MDC011-290400-
/O.CON.KPHI.SV.W.0248.000000T0000Z-230729T0400Z/
Sussex DE-Kent DE-Caroline MD-
1116 PM EDT Fri Jul 28 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR SUSSEX...SOUTHEASTERN KENT AND SOUTHEASTERN CAROLINE COUNTIES...
At 1116 PM EDT, a severe thunderstorm was located near Bridgeville,
or 11 miles west of Georgetown, moving northeast at 45 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Lewes, Federalsburg,
Milton, Bridgeville, Delmar, Ellendale, Henlopen Acres, Smithville,
Cape Henlopen State Park, Agner, Sycamore, Big Stone Beach, Long
Neck, Blades and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3874 7585 3901 7532
3868 7493 3845 7559
TIME...MOT...LOC 0316Z 239DEG 37KT 3870 7561
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
MLB886
WWUS51 KPHI 290336
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1136 PM EDT Fri Jul 28 2023
DEC001-005-MDC011-290400-
/O.CON.KPHI.SV.W.0248.000000T0000Z-230729T0400Z/
Sussex DE-Kent DE-Caroline MD-
1136 PM EDT Fri Jul 28 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR SUSSEX...SOUTHEASTERN KENT AND SOUTHEASTERN CAROLINE COUNTIES...
At 1136 PM EDT, a severe thunderstorm was located over Ellendale, or
8 miles north of Georgetown, moving northeast at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Lewes, Federalsburg,
Milton, Bridgeville, Delmar, Ellendale, Henlopen Acres, Smithville,
Cape Henlopen State Park, Agner, Sycamore, Big Stone Beach, Long
Neck, Blades and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3874 7585 3901 7532
3868 7493 3845 7559
TIME...MOT...LOC 0336Z 239DEG 37KT 3881 7538
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB658
WWUS51 KPHI 290400
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1200 AM EDT Sat Jul 29 2023
DEC001-005-MDC011-290410-
/O.EXP.KPHI.SV.W.0248.000000T0000Z-230729T0400Z/
Sussex DE-Kent DE-Caroline MD-
1200 AM EDT Sat Jul 29 2023
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHEASTERN KENT AND
SOUTHEASTERN CAROLINE COUNTIES HAS EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Sussex County until 12:30 AM EDT.
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3874 7585 3901 7532
3868 7493 3845 7559
TIME...MOT...LOC 0400Z 239DEG 37KT 3893 7513
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 41 min |
| Jul 28, 8:33 PM EDT | Special Weather Statement | PHI | New Castle | 42 min |
| Jul 28, 10:07 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 38 min |
| Jul 28, 10:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 31 min |
| Jul 28, 11:33 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 27 min |
| Jul 28, 11:59 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 31 min |
| Jul 29, 12:12 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 36 min |
| Jul 29, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
| Jul 29, 5:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 60 min |
| Jul 29, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 46 min |
| Jul 29, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 75 min |
| Jul 29, 6:18 PM EDT | Tornado Warning | PHI | Sussex | 27 min |
| Jul 29, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Jul 28, 8:18 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 42 min |
| Jul 28, 9:30 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 45 min |
| Jul 29, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 73 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2023Severe Thunderstorm Warnings in Maryland, 2023Every severe thunderstorm warning in 2023
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.