Alert archive / Delaware / Tornado Warnings in 2021
Tornado Warning 37, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Sep 1, 2021, 4:59 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 46 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
- Sep 1, 2021, 4:59 PM EDT (20:59 UTC)
- Expired
- Sep 1, 2021, 5:45 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 32 km from the middle of the area, began a volume at 21:02 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 1, 12:40 PM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.0 hours before the alert went out and 93 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
- 515 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted.
883
WFUS51 KPHI 012059
TORPHI
DEC001-005-MDC011-012145-
/O.NEW.KPHI.TO.W.0037.210901T2059Z-210901T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
459 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
West central Sussex County in southern Delaware...
Southwestern Kent County in central Delaware...
Southeastern Caroline County in eastern Maryland...
* Until 545 PM EDT.
* At 458 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Hurlock, moving northeast at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Denton, Federalsburg, Bridgeville, Preston, Agner, Harmony,
Smithville and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3865 7571 3869 7577 3868 7580 3870 7580
3871 7584 3870 7587 3870 7590 3868 7593
3893 7582 3879 7547 3862 7570
TIME...MOT...LOC 2058Z 213DEG 33KT 3860 7587
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann3 follow-up statements
357
WWUS51 KPHI 012113
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
513 PM EDT Wed Sep 1 2021
DEC001-005-MDC011-012145-
/O.CON.KPHI.TO.W.0037.000000T0000Z-210901T2145Z/
Sussex DE-Kent DE-Caroline MD-
513 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR WEST
CENTRAL SUSSEX...SOUTHWESTERN KENT AND SOUTHEASTERN CAROLINE
COUNTIES...
At 513 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Federalsburg, or near Hurlock, moving northeast at
35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Federalsburg, Bridgeville, Agner, Smithville and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3870 7588 3892 7579 3880 7550 3865 7571
3869 7577 3868 7580 3870 7580 3871 7584
3870 7587
TIME...MOT...LOC 2113Z 213DEG 30KT 3868 7580
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann755
WWUS51 KPHI 012125
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
525 PM EDT Wed Sep 1 2021
DEC001-005-MDC011-012145-
/O.CON.KPHI.TO.W.0037.000000T0000Z-210901T2145Z/
Sussex DE-Kent DE-Caroline MD-
525 PM EDT Wed Sep 1 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR WEST
CENTRAL SUSSEX...SOUTHWESTERN KENT AND SOUTHEASTERN CAROLINE
COUNTIES...
At 525 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Smithville, or 12 miles northeast of Hurlock, moving
northeast at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Agner, Smithville and Greenwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3870 7571 3875 7583 3891 7576 3882 7554
TIME...MOT...LOC 2125Z 212DEG 32KT 3877 7573
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Staarmann435
WWUS51 KPHI 012138
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
538 PM EDT Wed Sep 1 2021
DEC001-005-MDC011-012148-
/O.EXP.KPHI.TO.W.0037.000000T0000Z-210901T2145Z/
Sussex DE-Kent DE-Caroline MD-
538 PM EDT Wed Sep 1 2021
...THE TORNADO WARNING FOR WEST CENTRAL SUSSEX...SOUTHWESTERN KENT
AND SOUTHEASTERN CAROLINE COUNTIES WILL EXPIRE AT 545 PM EDT...
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area. However
gusty winds and heavy rain are still possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM EDT for central and
southern Delaware...and eastern Maryland.
LAT...LON 3870 7571 3875 7583 3891 7576 3882 7554
TIME...MOT...LOC 2138Z 213DEG 33KT 3886 7565
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 6:19 AM EDT | Areal Flood Advisory | PHI | New Castle | 116 min |
| Sep 1, 6:49 AM EDT | Flash Flood Warning | PHI | New Castle | 86 min |
| Sep 1, 8:03 AM EDT | River Flood Warning | PHI | New Castle | 4 hr |
| Sep 1, 2:53 PM EDT | Flash Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 5:01 PM EDT | Tornado Warning | PHI | Kent, New Castle | 44 min |
| Sep 1, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 44 min |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Kent, New Castle | 25 min |
| Sep 1, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 42 min |
| Sep 1, 6:08 PM EDT | River Flood Warning | PHI | New Castle | 18 hr |
| Sep 1, 6:15 PM EDT | River Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 6:24 PM EDT | Tornado Warning | PHI | New Castle | 16 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | New Castle | 28 hr |
| Sep 1, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 63 min |
| Sep 1, 7:44 PM EDT | River Flood Warning | PHI | New Castle | 11 hr |
| Sep 1, 3:16 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 44 min |
| Sep 1, 5:36 PM EDT | Tornado Warning | PHI | Kent | 24 min |
Nearby
Tornado Warnings in Delaware, 2021Tornado Warnings in Maryland, 2021Every tornado warning in 2021Tornadoes 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.