Alert archive / Delaware / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 108, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 30, 2019, 5:09 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 51 min. 9 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
- May 30, 2019, 5:09 PM EDT (21:09 UTC)
- Expired
- May 30, 2019, 6:00 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 17 km from the middle of the area, began a volume at 21:10 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 |
|---|---|---|---|
| May 30, 5:14 PM EDT | TSTM WND DMG | 4 Wsw Big Stone Beach, DE | MULTIPLE REPORTS OF TREES ACROSS ROADWAYS AND TREES INTO WIRES IN SOUTH BOWERS. TIME ESTIMATED FROM RADAR. |
| May 30, 5:20 PM EDT | TSTM WND DMG | 1 Sw Seaford, DE | DOWNED WIRES AT INTERSECTION OF BRADFORD STREET AND PENNSYLVANIA AVENUE. TIME ESTIMATED FROM RADAR. |
| May 30, 5:26 PM EDT | TSTM WND DMG | Georgetown, DE | DOWNED TREES IN GEORGETOWN. TIME ESTIMATED FROM RADAR. |
| May 30, 5:31 PM EDT | TSTM WND DMG | 2 Nne Lakeside Manor, DE | U.S. HIGHWAY 9 CLOSED BETWEEN FIRE TOWER ROAD AND KAYE ROAD OWING TO DOWNED TREES AND POWER LINES. TIME ESTIMATED FROM RADAR. |
| May 30, 5:38 PM EDT | TSTM WND DMG | Lewes, DE | SEVERAL DOWNED TREES IN LEWES. TIME ESTIMATED FROM RADAR. |
| May 30, 5:40 PM EDT | TSTM WND GST 53 | 2 Wnw Lewes, DE | MEASURED BY WXFLOW GAUGE. |
| May 30, 5:42 PM EDT | MARINE TSTM WIND 46 | 1 Ene Lewes, DE | |
| May 30, 5:50 PM EDT | MARINE TSTM WIND 53 | 2 Wnw Lewes, DE | MEASURED BY WXFLOW GAUGE. |
| May 30, 5:52 PM EDT | TSTM WND DMG | 1 Ene Millville, DE | SEVERAL DOWNED TREES IN THE MILLVILLE AND OCEAN VIEW AREA. 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 |
|---|---|---|---|
| May 30, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.2 hours before the alert went out and 85 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
- 23 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 1498 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
678
WUUS51 KPHI 302109
SVRPHI
DEC001-005-MDC011-302200-
/O.NEW.KPHI.SV.W.0108.190530T2109Z-190530T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
509 PM EDT Thu May 30 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southern Kent County in central Delaware...
Southeastern Caroline County in eastern Maryland...
* Until 600 PM EDT.
* At 509 PM EDT, a severe thunderstorm was located over Milford, or
15 miles south of Dover, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Dover, Georgetown, Milford, Seaford, Denton, Millsboro, Laurel,
Harrington, Camden, Lewes, Federalsburg, Milton, Bridgeville,
Delmar, Dagsboro, Preston, Millville, Ellendale, Bowers and
Woodside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3846 7569 3865 7571 3871 7584 3868 7593
3914 7565 3911 7540 3891 7531 3879 7510
3880 7509 3869 7507 3868 7507 3869 7514
3864 7513 3866 7507 3861 7506 3859 7521
3860 7506 3853 7505 3845 7544
TIME...MOT...LOC 2109Z 272DEG 35KT 3893 7545
HAIL...1.00IN
WIND...60MPH
$$
NC2 follow-up statements
309
WWUS51 KPHI 302138
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
538 PM EDT Thu May 30 2019
DEC001-MDC011-302147-
/O.CAN.KPHI.SV.W.0108.000000T0000Z-190530T2200Z/
Kent DE-Caroline MD-
538 PM EDT Thu May 30 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KENT AND SOUTHEASTERN
CAROLINE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 900 PM EDT for
southern Delaware.
LAT...LON 3857 7570 3867 7567 3883 7566 3884 7551
3885 7524 3879 7510 3880 7509 3869 7507
3868 7507 3869 7514 3864 7513 3866 7507
3861 7506 3859 7521 3860 7506 3853 7505
3845 7544 3848 7569
TIME...MOT...LOC 2137Z 272DEG 35KT 3892 7509
$$
DEC005-302200-
/O.CON.KPHI.SV.W.0108.000000T0000Z-190530T2200Z/
Sussex DE-
538 PM EDT Thu May 30 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SUSSEX COUNTY...
At 537 PM EDT, a severe thunderstorm was located 8 miles north of
Cape Henlopen State Park, or 10 miles west of Cape May, moving east
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, Seaford, Millsboro, Laurel, Lewes, Milton, Bridgeville,
Dagsboro, Millville, Ellendale, Henlopen Acres, Gumboro, Cape
Henlopen State Park, Sycamore, Long Neck, Ocean View, Blades,
Greenwood, Frankford and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3857 7570 3867 7567 3883 7566 3884 7551
3885 7524 3879 7510 3880 7509 3869 7507
3868 7507 3869 7514 3864 7513 3866 7507
3861 7506 3859 7521 3860 7506 3853 7505
3845 7544 3848 7569
TIME...MOT...LOC 2137Z 272DEG 35KT 3892 7509
HAIL...0.75IN
WIND...60MPH
$$
NC182
WWUS51 KPHI 302200
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
600 PM EDT Thu May 30 2019
DEC005-302208-
/O.EXP.KPHI.SV.W.0108.000000T0000Z-190530T2200Z/
Sussex DE-
600 PM EDT Thu May 30 2019
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX COUNTY WILL EXPIRE AT
600 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A severe thunderstorm watch remains in effect until 900 PM EDT for
southern Delaware.
LAT...LON 3857 7570 3867 7567 3883 7566 3884 7551
3885 7524 3879 7510 3880 7509 3869 7507
3868 7507 3869 7514 3864 7513 3866 7507
3861 7506 3859 7521 3860 7506 3853 7505
3845 7544 3848 7569
TIME...MOT...LOC 2158Z 272DEG 35KT 3891 7484
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:10 PM EDT | Special Weather Statement | PHI | Sussex | 35 min |
| May 29, 8:49 PM EDT | Special Weather Statement | PHI | Sussex | 26 min |
| May 30, 3:20 AM EDT | Flash Flood Watch | PHI | New Castle | 18 hr |
| May 30, 4:08 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 2 hr |
| May 30, 4:09 PM EDT | Special Weather Statement | PHI | New Castle | 36 min |
| May 30, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 43 min |
| May 30, 4:46 PM EDT | Special Weather Statement | PHI | New Castle | 29 min |
| May 30, 5:14 PM EDT | Special Weather Statement | PHI | New Castle | 31 min |
| May 30, 5:22 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle, Sussex | 2 hr |
| May 30, 3:42 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 33 min |
| May 30, 3:53 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 52 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2019Severe Thunderstorm Warnings in Maryland, 2019Every severe thunderstorm warning in 2019
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.