Alert archive / Delaware / Areal Flood Warnings in 2011
Areal Flood Warning 60, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 28, 2011, 7:03 PM EDT for Sussex County, Delaware. It was in force for 22 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2011, 7:03 PM EDT (23:03 UTC)
- Expired
- Aug 29, 2011, 5:00 PM EDT
- In force
- 22 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 25 km from the middle of the area, began a volume at 23:08 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.1 hours before the alert went out and 82 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
- 11 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -77 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
987
WGUS41 KPHI 282303
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
703 PM EDT SUN AUG 28 2011
DEC005-290700-
/O.NEW.KPHI.FA.W.0060.110828T2303Z-110829T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
703 PM EDT SUN AUG 28 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 300 AM EDT MONDAY
* AT 659 PM EDT...THE RIVER GAGE IN BRIDGEVILLE ALONG THE NANTICOKE
REMAINED ABOVE FLOOD STAGE. ALTHOUGH WATER LEVELS ARE EXPECTED TO
CREST THIS EVENING, FLOODING WILL CONTINUE THROUGH THE OVERNIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3846 7570 3847 7571 3855 7572 3869 7571
3883 7573 3884 7555 3887 7552 3888 7546
3845 7541
$$
KRUZDLO2 follow-up statements
676
WGUS41 KPHI 290636
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
236 AM EDT MON AUG 29 2011
DEC005-291500-
/O.EXT.KPHI.FA.W.0060.000000T0000Z-110829T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
236 AM EDT MON AUG 29 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 1100 AM EDT
* AT 234 AM EDT...THE RIVER GAGE IN BRIDGEVILLE ALONG THE NANTICOKE
REMAINED ABOVE FLOOD STAGE. WATER LEVELS HAVE CRESTED, BUT FLOODING
WILL CONTINUE THROUGH THE MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3846 7570 3847 7571 3855 7572 3869 7571
3883 7573 3884 7555 3887 7552 3888 7546
3845 7541
$$
KRUZDLO512
WGUS41 KPHI 291414
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1014 AM EDT MON AUG 29 2011
DEC005-292100-
/O.EXT.KPHI.FA.W.0060.000000T0000Z-110829T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
1014 AM EDT MON AUG 29 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 500 PM EDT MONDAY
* AT 1012 AM EDT...THE RIVER GAGE IN BRIDGEVILLE ALONG THE NANTICOKE
REMAINED ABOVE FLOOD STAGE. WATER LEVELS HAVE CRESTED, BUT MINOR
FLOODING WILL CONTINUE THROUGH AT LEAST PART OF THE AFTERNOON HOURS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3846 7570 3847 7571 3855 7572 3869 7571
3883 7573 3884 7555 3887 7552 3888 7546
3845 7541
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:28 PM EDT | Flash Flood Warning | PHI | Kent, New Castle, Sussex | 12 hr |
| Aug 27, 8:33 PM EDT | Tornado Warning | PHI | Kent, Sussex | 27 min |
| Aug 27, 8:49 PM EDT | Tornado Warning | PHI | Kent | 26 min |
| Aug 27, 9:46 PM EDT | Tornado Warning | PHI | New Castle | 29 min |
| Aug 27, 10:14 PM EDT | Tornado Warning | PHI | New Castle | 31 min |
| Aug 27, 11:37 PM EDT | Flash Flood Warning | PHI | New Castle | 12 hr |
| Aug 28, 7:07 AM EDT | Areal Flood Warning | PHI | Kent, Sussex | 12 hr |
| Aug 28, 8:09 AM EDT | Areal Flood Warning | PHI | New Castle | 12 hr |
| Aug 28, 11:07 AM EDT | Areal Flood Warning | PHI | New Castle | 18 hr |
Nearby
Areal Flood Warnings in Delaware, 2011Every areal flood warning in 2011
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.