Alert archive / Maryland / Areal Flood Warnings in 2012

Areal Flood Warning 28, NWS Philadelphia/Mount Holly

October 29, 20124 counties in Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood warning at Oct 29, 2012, 6:10 AM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 28 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: Oct 29, 2012, 6:10 AM EDT (10:10 UTC)
Expired: Oct 30, 2012, 10:00 AM EDT
In force: 28 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 10:14 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 00:00Z, 10.2 hours before the alert went out and 111 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 693 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

769 
WGUS41 KPHI 291010
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
610 AM EDT MON OCT 29 2012

DEC001-005-MDC011-029-035-041-292200-
/O.NEW.KPHI.FA.W.0028.121029T1010Z-121029T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-KENT DE-CAROLINE MD-SUSSEX DE-QUEEN ANNE'S MD-TALBOT MD-
610 AM EDT MON OCT 29 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR...
  KENT COUNTY IN NORTHEAST MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...
  SUSSEX COUNTY IN SOUTHERN DELAWARE...
  QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 600 PM EDT MONDAY

* AT 600 AM EDT...MODERATE TO HEAVY RAIN WAS CONTINUING TO MOVE
  INTO CENTRAL AND SOUTHERN DELAWARE AND THE ADJACENT COUNTIES OF
  NORTHEASTERN MARYLAND. SINCE SUNDAY, SOME LOCATIONS HAVE ALREADY
  RECEIVED 2 TO 4 INCHES OF RAINFALL. MODERATE TO HEAVY RAIN WILL
  CONTINUE THROUGH THE DAY AND INTO TONIGHT WITH TOTALS OF 6 TO 10
  INCHES POSSIBLE BY THE END OF THE DAY ON TUESDAY. AS A RESULT,
  THIS WARNING WILL LIKELY NEED TO BE EXTENDED.

* FLOODING IS EXPECTED ALONG STREAMS AND CREEKS AND IN AREAS OF POOR
  DRAINAGE. ROADWAY FLOODING IS ALSO ANTICIPATED. DO NOT DRIVE
  THROUGH FLOOD WATERS, THE WATER MAY BE DEEPER THAN YOU THINK IT IS.
  IF YOU LIVE IN A FLOOD PRONE AREA, BE PREPARED TO MOVE TO HIGHER
  GROUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3846 7569 3870 7580 3857 7603 3874 7631
      3866 7634 3867 7635 3887 7625 3880 7619
      3895 7625 3883 7637 3884 7638 3886 7638
      3904 7632 3900 7617 3934 7617 3932 7543
      3880 7509 3845 7505

$$

IOVINO

3 follow-up statements

382 
WGUS81 KPHI 291735
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
135 PM EDT MON OCT 29 2012

DEC001-005-MDC011-029-035-041-292200-
/O.CON.KPHI.FA.W.0028.000000T0000Z-121029T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-KENT DE-CAROLINE MD-SUSSEX DE-QUEEN ANNE'S MD-TALBOT MD-
135 PM EDT MON OCT 29 2012

...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR TALBOT...
QUEEN ANNE'S...SUSSEX...CAROLINE...KENT AND KENT COUNTIES...

AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
SHOW HEAVY RAIN FALLING ACROSS THE AREA. SURFACE OBSERVATIONS AND 
DOPPLER RADAR INDICATED THAT 3 TO 6 INCHES OF RAIN HAS FALLEN ACROSS 
THE REGION. 

* RISES CONTINUE ON CREEKS AND STREAMS THIS AFTERNOON. THE 
  ADDITIONAL RAINFALL COULD PUSH THE STREAMS AND CREEKS OVER THEIR 
  BANKS. 

* FLOODING IN AREAS OF POOR DRAINAGE IS EXPECTED. ROADWAY FLOODING 
  IS ALSO ANTICIPATED. DO NOT DRIVE THROUGH FLOOD WATERS...AS THE 
  WATER MAY BE DEEPER THAN YOU THINK IT IS. IF YOU LIVE IN A FLOOD 
  PRONE AREA...BE PREPARED TO MOVE TO HIGHER GROUND.

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 FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3846 7569 3870 7580 3857 7603 3874 7631
      3866 7634 3867 7635 3887 7625 3880 7619
      3895 7625 3883 7637 3884 7638 3886 7638
      3904 7632 3900 7617 3934 7617 3932 7543
      3880 7509 3845 7505

$$

HAYES

756 
WGUS41 KPHI 292054
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
454 PM EDT MON OCT 29 2012

DEC001-005-MDC011-029-035-041-300600-
/O.EXT.KPHI.FA.W.0028.000000T0000Z-121030T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-KENT DE-CAROLINE MD-SUSSEX DE-QUEEN ANNE'S MD-TALBOT MD-
454 PM EDT MON OCT 29 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLOOD WARNING FOR...
  KENT COUNTY IN NORTHEAST MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...
  SUSSEX COUNTY IN SOUTHERN DELAWARE...
  QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 200 AM EDT TUESDAY

* AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED 
TO SHOW HEAVY RAIN FALLING ACROSS THE AREA. SURFACE OBSERVATIONS AND 
DOPPLER RADAR INDICATED THAT 4 TO 8 INCHES OF RAIN HAD FALLEN ACROSS 
THE REGION. ANOTHER 2 TO 4 INCHES IS POSSIBLE INTO THIS EVENING. 

* RISES CONTINUE ON CREEKS AND STREAMS. THE ADDITIONAL RAINFALL WILL 
  PUSH STREAMS AND CREEKS OVER THEIR BANKS.

* THE GAGE ON THE NANTICOKE RIVER AT BRIDGEVILLE WAS 5.60 FEET AT    
  445 PM. WATER LEVELS WERE RISING QUICKLY. WATER LEVELS AT THE GAGE 
  COULD EXCEED FLOOD STAGE AS SOON AS THIS EVENING. 

* FLOODING IN AREAS OF POOR DRAINAGE IS ALSO EXPECTED. ROADWAY       
  FLOODING IS ALSO ANTICIPATED. DO NOT DRIVE THROUGH FLOOD           
  WATERS...AS THE WATER MAY BE DEEPER THAN YOU THINK IT IS. IF YOU   
  LIVE IN A FLOOD PRONE AREA...BE PREPARED TO MOVE TO HIGHER GROUND. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.

&&

LAT...LON 3846 7569 3870 7580 3857 7603 3874 7631
      3866 7634 3867 7635 3887 7625 3880 7619
      3895 7625 3883 7637 3884 7638 3886 7638
      3904 7632 3900 7617 3934 7617 3932 7543
      3880 7509 3845 7505

$$

KRUZDLO

513 
WGUS41 KPHI 300430
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1230 AM EDT TUE OCT 30 2012

DEC001-005-MDC011-029-035-041-301400-
/O.EXT.KPHI.FA.W.0028.000000T0000Z-121030T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KENT MD-KENT DE-CAROLINE MD-SUSSEX DE-QUEEN ANNE'S MD-TALBOT MD-
1230 AM EDT TUE OCT 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLOOD WARNING FOR...
  KENT COUNTY IN NORTHEAST MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...
  SUSSEX COUNTY IN SOUTHERN DELAWARE...
  QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 1000 AM EDT

* AT 1225 AM EDT...SURFACE OBSERVATIONS AND DOPPLER RADAR INDICATED 
THAT 8 TO 12INCHES OF RAIN HAD FALLEN ACROSS THE REGION. RISES 
CONTINUE ON CREEKS AND STREAMS. 

* THE GAGE ON THE NANTICOKE RIVER AT BRIDGEVILLE WAS 7.39 FEET AT    
  1115 PM. WATER LEVELS WERE STILL RISING. WATER LEVELS AT THE GAGE  
  SHOULD EXCEED THE FLOOD STAGE OF 8.00 FEET OVERNIGHT. 

* FLOODING IN AREAS OF POOR DRAINAGE IS ALSO EXPECTED. ROADWAY       
  FLOODING IS ALSO ANTICIPATED. DO NOT DRIVE THROUGH FLOOD           
  WATERS...AS THE WATER MAY BE DEEPER THAN YOU THINK IT IS. IF YOU   
  LIVE IN A FLOOD PRONE AREA...BE PREPARED TO MOVE TO HIGHER GROUND. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAN YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.

&&

LAT...LON 3846 7569 3870 7580 3857 7603 3874 7631
      3866 7634 3867 7635 3887 7625 3880 7619
      3895 7625 3883 7637 3884 7638 3886 7638
      3904 7632 3900 7617 3934 7617 3932 7543
      3880 7509 3845 7505

$$

KRUZDLO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 29, 3:12 AM EDT	Areal Flood Advisory	PHI	Caroline, Kent, Queen Anne's, Talbot	3 hr
Oct 29, 6:37 AM EDT	Areal Flood Warning	PHI	Cecil	28 hr
Oct 29, 8:32 AM EDT	River Flood Warning	PHI	New Castle	21 hr
Oct 29, 11:15 AM EDT	River Flood Warning	PHI	New Castle	26 hr
Oct 29, 11:42 AM EDT	River Flood Warning	PHI	New Castle	18 hr
Oct 29, 11:48 AM EDT	River Flood Warning	PHI	New Castle	18 hr
Oct 29, 2:46 PM EDT	Special Weather Statement	PHI	Kent, Sussex	119 min
Oct 29, 4:09 PM EDT	Special Weather Statement	PHI	Sussex	111 min
Oct 29, 4:28 PM EDT	Special Weather Statement	PHI	Kent, New Castle	2 hr

Nearby

Areal Flood Warnings in Maryland, 2012 Areal Flood Warnings in Delaware, 2012 Every 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.