Alert archive / Maryland / Flash Flood Warnings in 2011
Flash Flood Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 14, 2011, 2:27 AM EDT for Caroline County, Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Sussex County, Delaware. It was in force for 4 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 14, 2011, 2:27 AM EDT (06:27 UTC)
- Expired
- Aug 14, 2011, 6:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 54 km from the middle of the area, began a volume at 06:27 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 00:00Z, 6.5 hours before the alert went out and 152 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
- 250 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
670
WGUS51 KPHI 140627
FFWPHI
DEC001-003-005-MDC011-029-035-141030-
/O.NEW.KPHI.FF.W.0024.110814T0627Z-110814T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
227 AM EDT SUN AUG 14 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KENT COUNTY DELAWARE...
CAROLINE COUNTY MARYLAND...
NORTHEASTERN KENT COUNTY MARYLAND...
EASTERN QUEEN ANNE'S COUNTY...
NORTHWESTERN SUSSEX COUNTY...
NEW CASTLE COUNTY...
* UNTIL 630 AM EDT...
* AT 222 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN OVER THE WARNED AREA...UP TO TWO INCHES HAS ALREADY
FALLEN IN SOME PLACES IN THE LAST TWO HOURS. WITH ADDITIONAL RAIN
ON THE WAY...FLASH FLOODING IS EXPECTED WHERE THE HEAVIEST RAIN
HAPPENS TO FALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH 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.
PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.
&&
LAT...LON 3873 7601 3881 7590 3892 7598 3937 7588
3939 7577 3972 7579 3984 7566 3983 7549
3979 7542 3963 7561 3959 7555 3959 7558
3954 7556 3948 7559 3934 7546 3919 7539
3907 7539 3897 7529 3869 7582 3867 7595
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 12:37 AM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Aug 14, 1:12 AM EDT | Flash Flood Warning | PHI | Cecil | 4 hr |
| Aug 14, 1:51 AM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| Aug 14, 3:42 AM EDT | Flash Flood Watch | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 25 hr |
| Aug 14, 5:03 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Aug 14, 7:43 AM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 4 hr |
| Aug 14, 8:41 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Aug 14, 12:16 PM EDT | Areal Flood Warning | PHI | Cecil, Kent | 4 hr |
| Aug 14, 6:39 AM EDT | River Flood Warning | PHI | New Castle | 13 hr |
| Aug 14, 6:45 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
| Aug 14, 11:40 AM EDT | Areal Flood Warning | PHI | Kent, New Castle | 18 hr |
| Aug 14, 11:47 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 28 min |
| Aug 14, 2:56 PM EDT | River Flood Warning | PHI | New Castle | 3 hr |
Nearby
Flash Flood Warnings in Maryland, 2011Flash Flood Warnings in Delaware, 2011Every flash 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.