Alert archive / Delaware / Flash Flood Warnings in 2013
Flash Flood Warning 49, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 1, 2013, 5:58 PM EDT for 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 1, 2013, 5:58 PM EDT (21:58 UTC)
- Expired
- Aug 1, 2013, 10:00 PM EDT
- In force
- 4 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), 39 km from the middle of the area, began a volume at 22:00 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, 10.0 hours before the alert went out and 70 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
- 23 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
354
WGUS51 KPHI 012158
FFWPHI
DEC005-020200-
/O.NEW.KPHI.FF.W.0049.130801T2158Z-130802T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
558 PM EDT THU AUG 1 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SUSSEX COUNTY...
* UNTIL 1000 PM EDT...
* AT 551 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER SOUTHEASTERN SUSSEX
COUNTY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RURAL AREAS
OF SOUTHEASTERN SUSSEX COUNTY.
OBSERVED RAINFALL OF OVER THREE AND A HALF INCHES HAS BEEN REPORTED
FROM DEOS OBSERVATION SITES IN BETHANY BEACH AND SELBYVILLE
ADDITIONAL RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN
THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!
&&
LAT...LON 3855 7537 3862 7515 3864 7506 3859 7505
3845 7504 3845 7505 3845 7536
$$
FORECASTER:
SZATKOWSKI1 follow-up statement
141
WGUS71 KPHI 020000
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
800 PM EDT THU AUG 1 2013
DEC005-020008-
/O.CAN.KPHI.FF.W.0049.000000T0000Z-130802T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
800 PM EDT THU AUG 1 2013
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN SUSSEX
COUNTY...
THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.
WATER IS RECEDING...BUT JUST SOME MINOR FLOODING PROBLEMS MAY
CONTINUE FOR AN HOUR OR TWO.
LAT...LON 3855 7537 3862 7515 3864 7506 3859 7505
3845 7504 3845 7505 3845 7536
$$
FORECASTER:
SZATKOWSKIThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 3:42 AM EDT | Flash Flood Watch | PHI | New Castle | 14 hr |
| Aug 1, 10:50 AM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Aug 1, 11:57 AM EDT | River Flood Warning | PHI | New Castle | 3 hr |
| Aug 1, 12:17 PM EDT | Special Weather Statement | PHI | Kent | 43 min |
| Aug 1, 12:48 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 3 hr |
| Aug 1, 12:50 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 40 min |
| Aug 1, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 48 min |
| Aug 1, 2:35 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Aug 1, 2:57 PM EDT | Flash Flood Warning | PHI | Sussex | 3 hr |
Nearby
Flash Flood Warnings in Delaware, 2013Every flash flood warning in 2013
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.