Alert archive / Maryland / Flash Flood Warnings in 2016
Flash Flood Warning 34, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 21, 2016, 4:20 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland. It was in force for 4 hr. 11 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
- Aug 21, 2016, 4:20 PM EDT (20:20 UTC)
- Expired
- Aug 21, 2016, 8:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 20:22 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 |
|---|---|---|---|
| Aug 21, 4:30 PM EDT | FLOOD | 1 Ssw Melitota, MD | SIX INCHES OF FLOWING WATER AT ROUTE 298 AND NICHOLSON ROAD |
| Aug 21, 4:41 PM EDT | HEAVY RAIN 2.07 | 1 Se Betterton, MD | |
| Aug 21, 4:54 PM EDT | HEAVY RAIN 1.85 | Little Neck Farms, MD | |
| Aug 21, 5:15 PM EDT | HEAVY RAIN 2.31 | Prospect Bay, MD | |
| Aug 21, 5:15 PM EDT | HEAVY RAIN 3.02 | The Grove, MD | |
| Aug 21, 5:15 PM EDT | HEAVY RAIN 3.1 | Amberly Trailer Park, MD | |
| Aug 21, 5:15 PM EDT | HEAVY RAIN 3.34 | 1 Wsw Church Hill, MD | |
| Aug 21, 5:20 PM EDT | HEAVY RAIN 2.56 | 1 Ene Pleasant Cove, MD | |
| Aug 21, 5:20 PM EDT | HEAVY RAIN 2.65 | 1 Ene Betterton, MD | |
| Aug 21, 5:30 PM EDT | HEAVY RAIN 2.1 | Centreville, MD | ONE-HOUR RAINFALL |
| Aug 21, 7:09 PM EDT | HEAVY RAIN 3.01 | Galena, MD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.3 hours before the alert went out and 112 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
- 310 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 719 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
485
WGUS51 KPHI 212020
FFWPHI
MDC015-029-035-220015-
/O.NEW.KPHI.FF.W.0034.160821T2020Z-160822T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
420 PM EDT SUN AUG 21 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KENT COUNTY IN NORTHEASTERN MARYLAND...
SOUTHEASTERN CECIL COUNTY IN NORTHEASTERN MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
* UNTIL 815 PM EDT
* AT 418 PM EDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
A THUNDERSTORM PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. TWO TO
THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CENTERVILLE...CHESTERTOWN...CENTREVILLE...ROCK HALL...
CHURCH HILL...CECILTON...MILLINGTON...SUDLERSVILLE...BETTERTON...
OLD TOWN...KENNEDYVILLE...STARR...WARWICK...HOPE...MASSEY...
GRASONVILLE...MORGNEC...SASSAFRAS...WYE MILLS AND NEWTOWN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN ADDITIONAL ONE TO TWO INCHES OF RAINFALL IS POSSIBLE IN THE
WARNED AREA...ESPECIALLY OVER KENT AND QUEEN ANNES COUNTIES...
WHERE A LINE OF STORMS ARE MOVING OVER THE SAME AREAS.
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
&&
LAT...LON 3929 7617 3932 7618 3942 7600 3947 7599
3948 7578 3914 7575 3911 7584 3904 7588
3888 7620 3891 7625 3891 7621 3895 7621
3892 7626 3896 7624 3898 7627 3897 7622
3900 7617 3902 7624 3909 7623 3915 7628
$$
JRK1 follow-up statement
469
WGUS71 KPHI 212143
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
543 PM EDT SUN AUG 21 2016
MDC015-029-035-220015-
/O.CON.KPHI.FF.W.0034.000000T0000Z-160822T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-CECIL MD-QUEEN ANNE'S MD-
543 PM EDT SUN AUG 21 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
KENT...SOUTHEASTERN CECIL AND QUEEN ANNE'S COUNTIES...
AT 531 PM EDT...EMERGENCY MANAGEMENT REPORTED HIGH WATER ACROSS
NUMEROUS ROADS IN KENT AND QUEENE ANNE'S COUNTIES DUE TO HEAVY
RAINFALL FROM THUNDERSTORMS. DOPPLER RADAR AND AUTOMATED RAIN GAUGES
INDICATED OVER THREE INCHES OF RAIN HAS FALLEN NEAR THE KENT AND
QUEENE ANNE'S COUNTY BORDER. AN AUTOMATED RAIN GAUGE IN ROCK HALL
RECORDED FIVE AND HALF INCHES OF RAIN.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CENTERVILLE...CHESTERTOWN...CENTREVILLE...ROCK HALL...CHURCH HILL...
CECILTON...MILLINGTON...SUDLERSVILLE...BETTERTON...OLD TOWN...
KENNEDYVILLE...STARR...WARWICK...HOPE...MASSEY...GRASONVILLE...
MORGNEC...SASSAFRAS...WYE MILLS AND NEWTOWN.
LIGHT TO MODERATE RAIN WILL CONTINUE EARLY THIS EVENING BUT THE
HEAVY THUNDERSTORMS HAVE EXITED THE AREA. ADDITIONAL RAINFALL
AMOUNTS OF LESS THAN ONE-HALF INCH ARE POSSIBLE IN THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
WE WILL UPDATE THIS STATEMENT AS WE GET ADDITIONAL REPORTS OF
HIGH WATER AND CONFIRMATION OF FLASH FLOODING.
&&
LAT...LON 3929 7617 3932 7618 3942 7600 3947 7599
3948 7578 3914 7575 3911 7584 3904 7588
3888 7620 3891 7625 3891 7621 3895 7621
3892 7626 3896 7624 3898 7627 3897 7622
3900 7617 3902 7624 3909 7623 3915 7628
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:38 PM EDT | Special Weather Statement | PHI | Cecil | 22 min |
| Aug 21, 2:51 PM EDT | Areal Flood Advisory | PHI | Cecil | 114 min |
| Aug 21, 2:57 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 33 min |
| Aug 21, 3:30 PM EDT | Areal Flood Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's | 2 hr |
| Aug 21, 3:40 PM EDT | Special Weather Statement | PHI | Talbot | 50 min |
| Aug 21, 3:50 PM EDT | Special Weather Statement | PHI | Kent | 25 min |
| Aug 21, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 39 min |
| Aug 21, 4:19 PM EDT | Special Weather Statement | PHI | Talbot | 26 min |
| Aug 21, 4:29 PM EDT | Special Weather Statement | PHI | Caroline | 31 min |
| Aug 21, 4:50 PM EDT | Areal Flood Advisory | PHI | Caroline, Queen Anne's, Talbot | 3 hr |
| Aug 21, 4:54 PM EDT | Special Weather Statement | PHI | Caroline | 36 min |
| Aug 21, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 39 min |
| Aug 21, 5:09 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 4 hr |
| Aug 21, 6:35 PM EDT | Areal Flood Advisory | PHI | Caroline, Queen Anne's, Talbot | 3 hr |
Nearby
Flash 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.