Alert archive / Maryland / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 109, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2021, 4:08 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Sussex County, Delaware. It was in force for 52 min. 6 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, 4:08 PM EDT (20:08 UTC)
- Expired
- Jul 1, 2021, 5:00 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 48 km from the middle of the area, began a volume at 20:08 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, 4:16 PM EDT | TSTM WND DMG | 2 S Skipton, MD | MULTIPLE TREES AND WIRES DOWN IN WYE MILLS AND BETWEEN WYE MILLS AND EASTON. TIME ESTIMATED FROM RADAR. |
| Jul 1, 4:21 PM EDT | TSTM WND DMG | Federalsburg, MD | SEVERAL REPORTS OF POWER LINES DOWN AND NUMEROUS POWER OUTAGES IN THE FEDERALSBURG AREA. TIME ESTIMATED FROM RADAR. |
| Jul 1, 4:30 PM EDT | TSTM WND DMG | 2 Nnw Federalsburg, MD | TREES AND UTILITY WIRES DOWN WITH DEBRIS ON THE ROADWAY ALONG MARYLAND ROUTE 313 NEAR OLD DENTON ROAD. |
| Jul 1, 4:42 PM EDT | TSTM WND DMG | 4 Wsw Seaford, DE | DOWNED TREES AND POWER LINES NEAR WOODPECKER ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 4:50 PM EDT | TSTM WND DMG | 2 Sw Seaford, DE | DOWNED TREE LIMBS AND WIRES NEAR CRAIGS MILL ROAD AND WOODLAND ROAD. TIME ESTIMATED FROM RADAR. |
| Jul 1, 4:53 PM EDT | TSTM WND DMG | Seaford, DE | DOWNED WIRES ON HALL STREET, ALDER LANE, AND NEAR THE INTERSECTION OF NEALS SCHOOL ROAD AND BOYCE ROAD IN SEAFORD. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 1, 12:46 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.1 hours before the alert went out and 98 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
- 1445 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
343
WUUS51 KPHI 012008
SVRPHI
DEC005-MDC011-035-041-012100-
/O.NEW.KPHI.SV.W.0109.210701T2008Z-210701T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
408 PM EDT Thu Jul 1 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central Sussex County in southern Delaware...
Talbot County in eastern Maryland...
Southwestern Queen Anne's County in northeastern Maryland...
Southern Caroline County in eastern Maryland...
* Until 500 PM EDT.
* At 407 PM EDT, a severe thunderstorm was located over Cambridge,
moving northeast at 55 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Easton, Seaford, Federalsburg, Trappe, Preston, Oxford, Tanyard,
Harmony, Copperville, Agner, Matthews, Choptank, Hambleton,
Windyhill, Cordova, Blades and Bethel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3866 7596 3860 7599 3857 7604
3863 7608 3864 7615 3868 7618 3869 7619
3867 7620 3871 7624 3889 7614 3889 7611
3891 7613 3865 7551 3848 7569
TIME...MOT...LOC 2007Z 214DEG 50KT 3854 7609
HAIL...0.88IN
WIND...70MPH
$$
Davis1 follow-up statement
549
WWUS51 KPHI 012037
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
437 PM EDT Thu Jul 1 2021
MDC035-012046-
/O.CAN.KPHI.SV.W.0109.000000T0000Z-210701T2100Z/
Queen Anne's MD-
437 PM EDT Thu Jul 1 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN QUEEN ANNE'S
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern Delaware...and eastern Maryland.
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3866 7596 3860 7599 3857 7604
3863 7608 3885 7602 3871 7566 3848 7569
TIME...MOT...LOC 2036Z 214DEG 50KT 3888 7580
$$
DEC005-MDC011-041-012100-
/O.CON.KPHI.SV.W.0109.000000T0000Z-210701T2100Z/
Sussex DE-Talbot MD-Caroline MD-
437 PM EDT Thu Jul 1 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR WEST CENTRAL SUSSEX...SOUTHEASTERN TALBOT AND SOUTHERN CAROLINE
COUNTIES...
At 436 PM EDT, a severe thunderstorm was located over Denton, or 16
miles northeast of Easton, moving northeast at 60 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Easton, Federalsburg, Trappe, Preston, Agner, Matthews, Choptank,
Tanyard, Harmony, Windyhill and Cordova.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3866 7596 3860 7599 3857 7604
3863 7608 3885 7602 3871 7566 3848 7569
TIME...MOT...LOC 2036Z 214DEG 50KT 3888 7580
HAIL...0.88IN
WIND...70MPH
$$
DavisThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 |
| Jul 1, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's | 52 min |
| Jul 1, 4:10 PM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 94 min |
| Jul 1, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 43 min |
| Jun 30, 9:21 PM EDT | Special Weather Statement | PHI | New Castle | 39 min |
| Jul 1, 3:48 PM EDT | Areal Flood Advisory | PHI | New Castle | 112 min |
| Jul 1, 3:50 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| Jul 1, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 48 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 |
Nearby
Severe Thunderstorm Warnings in Maryland, 2021Severe Thunderstorm Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.