Alert archive / Maryland / Flash Flood Warnings in 2016
Flash Flood Warning 35, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 21, 2016, 5:09 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 4 hr. 1 report 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, 5:09 PM EDT (21:09 UTC)
- Expired
- Aug 21, 2016, 9:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 21:13 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, 5:15 PM EDT | HEAVY RAIN 2.31 | Prospect Bay, 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, 9.2 hours before the alert went out and 113 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.
959
WGUS51 KPHI 212109
FFWPHI
DEC001-005-MDC011-035-041-220100-
/O.NEW.KPHI.FF.W.0035.160821T2109Z-160822T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
509 PM EDT SUN AUG 21 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KENT COUNTY IN CENTRAL DELAWARE...
NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
NORTHWESTERN TALBOT COUNTY IN EASTERN MARYLAND...
SOUTHERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
CAROLINE COUNTY IN EASTERN MARYLAND...
* UNTIL 900 PM EDT
* AT 502 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. ONE INCH OR LESS OF RAIN HAS
FALLEN ALREADY. HOWEVER...A LINE OF THUNDERSTORMS IS QUICKLY
FORMING OVER THE WARNED AREA. THESE STORMS WILL MOVE OVER THE SAME
AREAS IN THE NEXT ONE TO TWO HOURS. FLASH FLOODING IS EXPECTED TO
BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DOVER...EASTON...TALBOT...SMYRNA...MILFORD...DENTON...HARRINGTON...
CAMDEN...CLAYTON...GREENSBORO...OAKLAND...RIDGELY...CHESWOLD...
ST. MICHAELS...BOWERS...GOLDSBORO...QUEEN ANNE...WOODSIDE...
VIOLA AND HARTLY.
ADDITIONAL RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
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 3886 7626 3886 7625 3879 7622 3904 7631
3900 7629 3897 7622 3908 7586 3914 7575
3929 7576 3934 7544 3893 7529 3873 7613
3871 7624 3876 7622 3872 7630 3877 7630
3868 7635 3876 7638
$$
JRK1 follow-up statement
383
WGUS71 KPHI 212238
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
638 PM EDT SUN AUG 21 2016
DEC001-005-MDC011-035-041-212245-
/O.CAN.KPHI.FF.W.0035.000000T0000Z-160822T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT DE-SUSSEX DE-TALBOT MD-QUEEN ANNE'S MD-CAROLINE MD-
638 PM EDT SUN AUG 21 2016
...THE FLASH FLOOD WARNING FOR KENT...NORTHWESTERN SUSSEX...
NORTHWESTERN TALBOT...SOUTHERN QUEEN ANNE'S AND CAROLINE COUNTIES IS
CANCELLED...
THE HEAVY RAIN HAS ENDED...AND FLASH FLOODING IS NO LONGER EXPECTED
TO POSE A THREAT. A FLOOD ADVISORY WAS ISSUED FOR A MAJORITY OF THE
AREA THAT WAS PREVIOUSLY UNDER THE FLASH FLOOD WARNING WITH MINOR
FLOODING EXPECTED...ESPECIALLY IN AREAS OF POOR DRAINAGE.
LAT...LON 3886 7626 3886 7625 3879 7622 3904 7631
3900 7629 3897 7622 3908 7586 3914 7575
3929 7576 3934 7544 3893 7529 3873 7613
3871 7624 3876 7622 3872 7630 3877 7630
3868 7635 3876 7638
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:51 PM EDT | Areal Flood Advisory | PHI | New Castle | 114 min |
| Aug 21, 3:30 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 2 hr |
| Aug 21, 3:47 PM EDT | Areal Flood Advisory | PHI | New Castle | 118 min |
| Aug 21, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Aug 21, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Aug 21, 5:28 PM EDT | Special Weather Statement | PHI | Kent | 17 min |
| Aug 21, 5:46 PM EDT | Special Weather Statement | PHI | Sussex | 14 min |
| Aug 21, 5:54 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Aug 21, 6:31 PM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Aug 21, 6:35 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Aug 21, 7:04 PM EDT | Special Weather Statement | PHI | Sussex | 26 min |
| Aug 21, 2:38 PM EDT | Special Weather Statement | PHI | Cecil | 22 min |
| Aug 21, 2:57 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 33 min |
| 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, 4:19 PM EDT | Special Weather Statement | PHI | Talbot | 26 min |
| Aug 21, 4:20 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| 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 |
Nearby
Flash Flood Warnings in Maryland, 2016Flash Flood Warnings in Delaware, 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.