Alert archive / Delaware / Flash Flood Warnings in 2019
Flash Flood Warning 34, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 28, 2019, 6:15 PM EDT for New Castle County, Delaware. It was in force for 106 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
- Jun 28, 2019, 6:15 PM EDT (22:15 UTC)
- Expired
- Jun 28, 2019, 8:01 PM EDT
- In force
- 106 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County New Castle County, DE
The radar
The Dover AFB radar (KDOX), 97 km from the middle of the area, began a volume at 22:17 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 174 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
- 92 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 1515 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
328
WGUS51 KPHI 282215
FFWPHI
DEC003-290015-
/O.NEW.KPHI.FF.W.0034.190628T2215Z-190629T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
615 PM EDT Fri Jun 28 2019
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northern New Castle County in northern Delaware...
* Until 815 PM EDT.
* At 610 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the northern portions of the county. Flash
flooding is expected to begin shortly in the areas of heaviest
rain. Flooded roadways will be the main threat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3971 7578 3980 7569 3980 7555 3977 7545
3971 7550 3972 7552 3967 7555 3965 7559
3962 7557 3964 7560 3963 7561 3958 7560
3958 7578
$$
JJM2 follow-up statements
700
WGUS71 KPHI 282251
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
651 PM EDT Fri Jun 28 2019
DEC003-290015-
/O.CON.KPHI.FF.W.0034.000000T0000Z-190629T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-
651 PM EDT Fri Jun 28 2019
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
NORTHWESTERN NEW CASTLE COUNTY...
At 649 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area have moved east. However, water remains
ponded in some areas, so the Flash Flood Warning will remain in
effect until this water drains.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3973 7575 3975 7568 3974 7565 3965 7565
3965 7576
$$
JJM305
WGUS71 KPHI 290001
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
801 PM EDT Fri Jun 28 2019
DEC003-290010-
/O.CAN.KPHI.FF.W.0034.000000T0000Z-190629T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-
801 PM EDT Fri Jun 28 2019
...THE FLASH FLOOD WARNING FOR NORTHWESTERN NEW CASTLE COUNTY IS
CANCELLED...
The heavy rain has ended and flood waters on roadways and in poor
drainage areas are receding. Please continue to heed any remaining
road closures.
LAT...LON 3973 7575 3975 7568 3974 7565 3965 7565
3965 7576
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:04 PM EDT | Special Weather Statement | PHI | Sussex | 26 min |
| Jun 28, 3:51 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Jun 28, 4:39 PM EDT | Special Weather Statement | PHI | Kent | 36 min |
| Jun 28, 5:37 PM EDT | Special Weather Statement | PHI | New Castle | 23 min |
| Jun 28, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 33 min |
Nearby
Flash Flood Warnings in Delaware, 2019Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.