Alert archive / Delaware / Flash Flood Warnings in 2012
Flash Flood Warning 46, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 3, 2012, 7:31 AM EDT for New Castle County, Delaware. It was in force for 2 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
- Sep 3, 2012, 7:31 AM EDT (11:31 UTC)
- Expired
- Sep 3, 2012, 9:46 AM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County New Castle County, DE
The radar
The Dover AFB radar (KDOX), 65 km from the middle of the area, began a volume at 11:32 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 11.5 hours before the alert went out and 162 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
- 1211 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 671 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
568
WGUS51 KPHI 031131
FFWPHI
DEC003-031430-
/O.NEW.KPHI.FF.W.0046.120903T1131Z-120903T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
731 AM EDT MON SEP 3 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN NEW CASTLE COUNTY...
* UNTIL 1030 AM EDT...
* AT 720 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER SOUTHERN NEW CASTLE COUNTY. RAINFALL
ESTIMATES ARE OVER TWO INCHES WITHIN THE LAST HOUR.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CHAMBERSVILLE...MIDDLETOWN...AND GREEN SPRING.
ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO 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!
PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.
&&
LAT...LON 3948 7575 3951 7557 3950 7556 3946 7558
3942 7553 3938 7551 3936 7551 3935 7556
3934 7555 3931 7559 3931 7563 3929 7567
3930 7573
$$
ROBERTSON1 follow-up statement
854
WGUS71 KPHI 031346
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
946 AM EDT MON SEP 3 2012
DEC003-031356-
/O.CAN.KPHI.FF.W.0046.000000T0000Z-120903T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE DE-
946 AM EDT MON SEP 3 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN NEW CASTLE
COUNTY...
THE HEAVY RAIN HAS ENDED ACROSS THE AREA. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED. THERE MAY STILL BE AREAS OF HIGH
WATER ALONG A FEW ROADWAYS AND LOW LYING AREAS...DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD. ADDITIONAL RAIN IS POSSIBLE
THROUGHOUT TODAY.
LAT...LON 3948 7575 3951 7557 3950 7556 3946 7558
3942 7553 3938 7551 3936 7551 3935 7556
3934 7555 3931 7559 3931 7563 3929 7567
3930 7573
$$
ROBERTSONThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 6:05 AM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Sep 3, 8:23 AM EDT | Flash Flood Warning | PHI | New Castle | 82 min |
| Sep 3, 1:42 PM EDT | Special Weather Statement | PHI | Sussex | 93 min |
| Sep 3, 1:48 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Sep 3, 1:53 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Sep 3, 2:19 PM EDT | Areal Flood Advisory | PHI | Sussex | 114 min |
| Sep 3, 2:39 PM EDT | Special Weather Statement | PHI | New Castle | 66 min |
| Sep 3, 2:44 PM EDT | Areal Flood Advisory | PHI | New Castle | 119 min |
| Sep 3, 3:00 PM EDT | Flash Flood Watch | PHI | New Castle | 49 hr |
| Sep 3, 3:14 PM EDT | Flash Flood Warning | PHI | Kent, New Castle | 4 hr |
| Sep 3, 3:25 PM EDT | Tornado Warning | PHI | Kent | 20 min |
| Sep 3, 3:58 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
Nearby
Flash Flood Warnings in Delaware, 2012Every flash flood warning in 2012
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.