Alert archive / Delaware / Flash Flood Warnings in 2016
Flash Flood Warning 37, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 29, 2016, 4:28 AM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 5 hr. 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
- Sep 29, 2016, 4:28 AM EDT (08:28 UTC)
- Expired
- Sep 29, 2016, 9:30 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 29 km from the middle of the area, began a volume at 08:28 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 |
|---|---|---|---|
| Sep 29, 7:06 AM EDT | HEAVY RAIN 4.4 | Federalsburg, MD | |
| Sep 29, 7:24 AM EDT | HEAVY RAIN 4.1 | Seaford, DE | |
| Sep 29, 7:24 AM EDT | HEAVY RAIN 4.48 | Adamsville, DE | |
| Sep 29, 8:01 AM EDT | HEAVY RAIN 4.49 | Adamsville, DE | |
| Sep 29, 9:09 AM EDT | FLOOD | American Corner, MD | RICHARDSON ROAD PARTLY CLOSED DUE TO FLOODING. |
| Sep 29, 9:09 AM EDT | FLOOD | American Corner, MD | RIVER LANDING ROAD CLOSED DUE TO FLOODING |
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 00:00Z, 8.5 hours before the alert went out and 96 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
- 712 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 516 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
The text
As transmitted.
861
WGUS51 KPHI 290828
FFWPHI
DEC001-005-MDC011-291330-
/O.NEW.KPHI.FF.W.0037.160929T0828Z-160929T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
428 AM EDT THU SEP 29 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
WEST CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
CAROLINE COUNTY IN EASTERN MARYLAND...
* UNTIL 930 AM EDT
* AT 425 AM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAIN
HAVE ALREADY FALLEN ACROSS PORTIONS OF CAROLINE COUNTY WITHIN THE
LAST HOUR. THIS HEAVY RAIN WILL SLOWLY MOVE NORTHEASTWARD OVER THE
NEXT HOUR OR TWO. BECAUSE THIS AMOUNT OF RAIN WILL FALL IN A SHORT
PERIOD OF TIME...FLASH FLOODING IS LIKELY TO OCCUR.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SEAFORD...DENTON...FEDERALSBURG...BRIDGEVILLE...GREENSBORO...
OAKLAND...RIDGELY...PRESTON...GOLDSBORO...HARMONY...ANDREWSVILLE...
AGNER...SMITHVILLE...SANDTOWN...HAZLETTVILLE AND HENDERSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAT YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
&&
LAT...LON 3865 7571 3869 7577 3868 7580 3870 7580
3871 7584 3870 7590 3902 7590 3914 7564
3866 7560 3861 7570
$$
ROBERTSON1 follow-up statement
112
WGUS71 KPHI 291321
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
921 AM EDT THU SEP 29 2016
DEC001-005-MDC011-291330-
/O.EXP.KPHI.FF.W.0037.000000T0000Z-160929T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT DE-SUSSEX DE-CAROLINE MD-
921 AM EDT THU SEP 29 2016
...THE FLASH FLOOD WARNING FOR SOUTHWESTERN KENT...WEST CENTRAL
SUSSEX AND CAROLINE COUNTIES WILL EXPIRE AT 930 AM EDT...
THE HEAVY RAIN HAS ENDED AND NO NEW FLOODING IS EXPECTED IN THE
SHORT TERM. SOME FLOODING WAS REPORTED IN CAROLINE COUNTY IN BOTH
THE CHOPTANK AND PRESTON AREAS. WATER WILL CONTINUE TO RECEDE.
MORE RAIN IS EXPECTED LATER TODAY WHICH MAY LEAD TO ADDITIONAL
FLOODING.
LAT...LON 3865 7571 3869 7577 3868 7580 3870 7580
3871 7584 3870 7590 3902 7590 3914 7564
3866 7560 3861 7570
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 12:21 AM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 8 hr |
| Sep 29, 1:38 AM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Sep 29, 2:13 AM EDT | Flash Flood Warning | PHI | Sussex | 9 hr |
| Sep 29, 2:18 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
| Sep 29, 5:08 AM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 8 hr |
| Sep 29, 6:14 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Sep 29, 10:27 AM EDT | Coastal Flood Warning | PHI | Kent, Sussex | 15 hr |
| Sep 29, 12:59 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Sep 29, 1:22 PM EDT | Coastal Flood Advisory | PHI | New Castle | 12 hr |
| Sep 29, 2:32 PM EDT | Areal Flood Warning | PHI | Sussex | 15 hr |
| Sep 29, 2:45 PM EDT | Wind Advisory | PHI | Sussex | 20 hr |
| Sep 29, 7:27 PM EDT | Areal Flood Advisory | PHI | Kent | 9 hr |
Nearby
Flash Flood Warnings in Delaware, 2016Flash Flood Warnings in Maryland, 2016Every flash flood warning in 2016
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.