Alert archive / Maryland / Areal Flood Warnings in 2012
Areal Flood Warning 15, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 26, 2012, 7:59 PM EDT for Queen Anne's County, Talbot County, Maryland. It was in force for 15 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 26, 2012, 7:59 PM EDT (23:59 UTC)
- Expired
- Aug 27, 2012, 10:45 AM EDT
- In force
- 15 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 00:01 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 12:00Z, 12.0 hours before the alert went out and 106 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
- 926 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
911
WGUS41 KPHI 262359
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
759 PM EDT SUN AUG 26 2012
MDC035-041-271145-
/O.NEW.KPHI.FA.W.0015.120826T2359Z-120827T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TALBOT MD-QUEEN ANNE'S MD-
759 PM EDT SUN AUG 26 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR...
TALBOT COUNTY IN EASTERN MARYLAND...
SOUTHWESTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
* UNTIL 745 AM EDT MONDAY
* AT 750 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT TWO TO SEVEN INCHES OF RAIN HAD FALLEN IN MUCH OF TALBOT AND
SOUTHWESTERN QUEEN ANNE'S COUNTY TODAY. FLOODING WAS REPORTED
THROUGHOUT THE REGION. PERIODS OF HEAVY RAIN WILL CONTINUE INTO
TONIGHT WITH SOME LOCATIONS POSSIBLY RECEIVING ANOTHER TWO TO
FOUR INCHES OF RAIN.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED. IF FLOOD WATERS THREATEN...MOVE TO HIGHER GROUND
IMMEDIATELY. DO NOT ATTEMPT TO DRIVE THROUGH FLOOD WATERS.
LAT...LON 3860 7613 3872 7626 3872 7631 3866 7634
3867 7635 3877 7640 3875 7635 3887 7625
3881 7621 3882 7620 3894 7624 3884 7638
3904 7630 3898 7622 3902 7618 3904 7594
3881 7591 3873 7602 3867 7594 3857 7603
$$
IOVINO2 follow-up statements
542
WGUS81 KPHI 270403
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1203 AM EDT MON AUG 27 2012
MDC035-270410-
/O.CAN.KPHI.FA.W.0015.000000T0000Z-120827T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
QUEEN ANNE'S MD-
1203 AM EDT MON AUG 27 2012
...THE FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHWESTERN QUEEN ANNE'S
COUNTY...
LAT...LON 3860 7613 3872 7626 3872 7631 3871 7632
3866 7634 3874 7635 3877 7640 3875 7635
3887 7625 3881 7621 3887 7619 3889 7610
3892 7611 3895 7609 3892 7595 3883 7591
3873 7602 3867 7594 3857 7603
$$
MDC041-271145-
/O.CON.KPHI.FA.W.0015.000000T0000Z-120827T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TALBOT MD-
1203 AM EDT MON AUG 27 2012
...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM EDT FOR TALBOT
COUNTY...
AT MIDNIGHT EDT NUMEROUS COUNTY ROADWAYS ARE STILL UNDER WATER AND
ARE CLOSED. ALTHOUGH THE RAIN HAS MOVED THROUGH THE REGION IT WILL
TAKE SEVERAL MORE HOURS FOR THE WATERS TO RECEDE FROM THE ROADWAYS.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER IN URBAN AREAS...
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER POOR DRAINAGE
AREAS AND LOW LYING SPOTS.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF 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.
&&
LAT...LON 3860 7613 3872 7626 3872 7631 3871 7632
3866 7634 3874 7635 3877 7640 3875 7635
3887 7625 3881 7621 3887 7619 3889 7610
3892 7611 3895 7609 3892 7595 3883 7591
3873 7602 3867 7594 3857 7603
$$
HEAVENER497
WGUS41 KPHI 271125
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
725 AM EDT MON AUG 27 2012
MDC041-271445-
/O.EXT.KPHI.FA.W.0015.000000T0000Z-120827T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TALBOT MD-
725 AM EDT MON AUG 27 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 1045 AM EDT
* AT 719 AM EDT...EMERGENCY OFFICIALS STILL REPORT A COUPLE OF RURAL
ROAD WASHOUTS AND A COUPLE OF RURAL BRIDGES STILL COMPROMISED BY
FLOOD WATERS.
* THERE MAY BE A FEW MORE HEAVY SHOWERS DURING MIDDAY BUT NO RENEWED
EXTENSIVE HEAVY RAIN IS IMMINENT AND FLOOD WATERS WILL CONTINUE TO
SLOWLY RECEDE THIS MORNING.
A FLOOD WARNING MEANS THAT FLOODING HAS BEEN REPORTED. ALL
INTERESTED PARTIES SHOULD CONTINUE TO FOLLOW THE ADVICE OF LOCAL
OFFICIALS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER IN URBAN AREAS...
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER POOR DRAINAGE
AREAS AND LOW LYING SPOTS.
DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.
&&
LAT...LON 3860 7613 3872 7626 3872 7631 3871 7632
3866 7634 3874 7635 3877 7640 3875 7635
3887 7625 3881 7621 3887 7619 3889 7610
3892 7611 3895 7609 3892 7595 3883 7591
3873 7602 3867 7594 3857 7603
$$
DRAGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 7:43 AM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's | 2 hr |
| Aug 26, 11:48 AM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's, Talbot | 117 min |
| Aug 26, 12:17 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 118 min |
| Aug 26, 12:49 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 91 min |
| Aug 26, 1:29 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 7 hr |
| Aug 26, 2:22 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 53 min |
| Aug 26, 2:58 PM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's | 4 hr |
| Aug 26, 3:15 PM EDT | Severe Thunderstorm Warning | PHI | Talbot | 25 min |
| Aug 26, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 39 min |
| Aug 26, 5:42 PM EDT | Tornado Warning | PHI | Caroline | 19 min |
| Aug 26, 6:15 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's | 4 hr |
| Aug 26, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 66 min |
Nearby
Areal Flood Warnings in Maryland, 2012Every areal 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.