Alert archive / Delaware / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 7, 2020, 9:24 AM EST for Kent County, New Castle County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 66 min. 27 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
- Feb 7, 2020, 9:24 AM EST (14:24 UTC)
- Expired
- Feb 7, 2020, 10:30 AM EST
- In force
- 66 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, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 9 km from the middle of the area, began a volume at 14:25 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 |
|---|---|---|---|
| Feb 7, 9:35 AM EST | TSTM WND DMG | 2 Nnw Hazlettville, DE | HALLTOWN RD CLOSED AT BRITTANY LN DUE TO WIRES DOWN IN THE ROADWAY. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:40 AM EST | TSTM WND GST 58 | Clayton, DE | |
| Feb 7, 9:45 AM EST | TSTM WND DMG | 3 Wnw Felton, DE | DOWNED TREE ON WIRES. |
| Feb 7, 9:45 AM EST | TSTM WND DMG | Wyoming, DE | LOSS OF STOCKADE FENCING. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:46 AM EST | TSTM WND DMG | 2 Ne Hazlettville, DE | POWER POLE SNAPPED FROM STRONG WIND. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:48 AM EST | TSTM WND DMG | 2 Wsw Harrington, DE | DOWNED POWER LINES FROM STRONG WINDS. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:51 AM EST | TSTM WND DMG | 2 Wsw Felton, DE | DOWNED TREE AND WIRES. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:52 AM EST | TSTM WND DMG | 4 Wnw Seaford, DE | DOWNED POWER LINES FROM STRONG WINDS. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:52 AM EST | TSTM WND DMG | 4 Wnw Seaford, DE | DOWNED TREES AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:52 AM EST | TSTM WND DMG | Harrington, DE | ROOF BLOWN OFF A TRAILER. TIME ESTIMATED FROM RADAR. |
| Feb 7, 9:55 AM EST | TSTM WND GST 66 | 1 Ne Magnolia, DE | |
| Feb 7, 9:56 AM EST | TSTM WND DMG | 2 Sw Magnolia, DE | DOWNED TREE AND POWER POLE. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:00 AM EST | TSTM WND GST 59 | 3 E Highland Acres, DE | |
| Feb 7, 10:04 AM EST | TSTM WND DMG | 4 E Seaford, DE | DOWNED TREES AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:05 AM EST | TSTM WND GST 64 | 2 Sse Greenwood, DE | |
| Feb 7, 10:06 AM EST | TSTM WND DMG | 5 Ssw Ellendale, DE | DOWNED TREES AND WIRES IN THE AREA. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:09 AM EST | TSTM WND DMG | Milton, DE | 2 LARGE TREES DOWN AT A RESIDENCE. REPORT VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:10 AM EST | TSTM WND DMG | 1 E Millsboro, DE | TREE ON ROOF IN RIVER ROAD. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:10 AM EST | TSTM WND DMG | 4 S Millville, DE | TREE INTO A HOUSE. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:10 AM EST | TSTM WND DMG | Roxana, DE | TRAILER SPLIT IN HALF BY FALLEN TREE. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:12 AM EST | TSTM WND DMG | 1 Nw Georgetown, DE | DAMAGE TO BILLBOARDS, POWER LINES, AND TRAFFIC SIGNALS FROM STRONG WINDS IN THE GEORGETOWN AREA. TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:15 AM EST | TSTM WND DMG | 2 Nw Stockley, DE | TREE FELL ON STRUCTURE, TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:15 AM EST | TSTM WND DMG | Dagsboro, DE | POLES DOWN ON MAIN STREET, TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:15 AM EST | TSTM WND GST 63 | 3 Ene Selbyville, DE | |
| Feb 7, 10:20 AM EST | TSTM WND DMG | 1 Se Dagsboro, DE | TREE DOWN ON STRUCTURE, TIME ESTIMATED FROM RADAR. |
| Feb 7, 10:20 AM EST | TSTM WND GST 59 | 4 S Indian Beach, DE | |
| Feb 7, 10:26 AM EST | TSTM WND GST 70 | 2 Wnw Lewes, DE | WEATHERFLOW SITE XLEW. |
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 12:00Z, 2.4 hours before the alert went out and 108 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 530 m above ground
- 0-6 km bulk shear
- 147 kt
- 0-1 km storm-relative helicity
- 1300 m²/s²
- 0-3 km storm-relative helicity
- 1322 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
926
WUUS51 KPHI 071424
SVRPHI
DEC001-003-005-MDC011-071530-
/O.NEW.KPHI.SV.W.0004.200207T1424Z-200207T1530Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
924 AM EST Fri Feb 7 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southwestern New Castle County in northern Delaware...
Kent County in central Delaware...
East central Caroline County in eastern Maryland...
* Until 1030 AM EST.
* At 924 AM EST, severe thunderstorms were located along a line
extending from near Goldsboro to near Tanyard to 6 miles south of
Cambridge, moving northeast at 70 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...
Dover, Georgetown, Smyrna, Milford, Seaford, Millsboro, Laurel,
Harrington, Camden, Clayton, Lewes, Milton, Selbyville,
Bridgeville, Delmar, Cheswold, Dagsboro, Millville, Ellendale and
Bowers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3846 7569 3936 7577 3948 7557 3920 7533
3894 7523 3888 7508 3845 7500
TIME...MOT...LOC 1424Z 244DEG 59KT 3907 7581 3876 7602 3847 7610
HAIL...0.75IN
WIND...60MPH
$$
Staarmann1 follow-up statement
398
WWUS51 KPHI 071524
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1024 AM EST Fri Feb 7 2020
DEC001-003-005-MDC011-071532-
/O.EXP.KPHI.SV.W.0004.000000T0000Z-200207T1530Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-
1024 AM EST Fri Feb 7 2020
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTHWESTERN NEW
CASTLE...KENT AND EAST CENTRAL CAROLINE COUNTIES WILL EXPIRE AT 1030
AM EST...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible behind these thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3846 7569 3936 7577 3948 7557 3920 7533
3894 7523 3888 7508 3845 7500
TIME...MOT...LOC 1522Z 244DEG 59KT 3947 7473 3916 7494 3888 7503
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 6, 8:24 PM EST | High Wind Warning | PHI | Sussex | 21 hr |
| Feb 7, 8:03 AM EST | Coastal Flood Advisory | PHI | New Castle | 11 hr |
| Feb 7, 8:18 AM EST | Coastal Flood Statement | PHI | Sussex | 11 hr |
| Feb 7, 8:52 AM EST | Severe Thunderstorm Warning | PHI | New Castle | 53 min |
| Feb 7, 9:36 AM EST | Severe Thunderstorm Warning | PHI | New Castle | 39 min |
| Feb 7, 9:39 AM EST | Tornado Warning | PHI | New Castle | 36 min |
| Feb 7, 8:49 AM EST | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 56 min |
| Feb 7, 2:13 PM EST | Coastal Flood Advisory | PHI | Kent | 7 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 2020Severe Thunderstorm Warnings in Maryland, 2020Every severe thunderstorm warning in 2020
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.