River Flood Warning 19, NWS Philadelphia/Mount Holly

Issued

Mar 8, 2011, 6:00 PM EST (23:00 UTC)

Expired

Mar 9, 2011, 2:21 AM EST

In force

8 hr

Issued by

NWS Philadelphia/Mount Holly

Flood severity

Minor

Counties Cecil County, MD, Harford County, MD

The Dover AFB radar (KDOX), 100 km from the middle of the area, began a volume at 23:01 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.

Written for the forecast point Susquehanna River at Conowingo Dam (CNWM2). The gauge peaked at 24.13 ft at Mar 8, 2011, 5:00 PM EST.

Action stage

21.5 ft

Minor stage

23.5 ft

Moderate stage

24.8 ft

Major stage

28.5 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01578310, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

048 
WGUS41 KPHI 082300
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
600 PM EST TUE MAR 8 2011

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD 
WARNING FOR THE FOLLOWING RIVERS IN MARYLAND... 

  SUSQUEHANNA BELOW CONOWINGO DAM AFFECTING CECIL AND HARFORD COUNTIES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

MDC015-025-090500-
/O.NEW.KPHI.FL.W.0019.110308T2300Z-000000T0000Z/
/CNWM2.1.ER.110308T2048Z.110309T0100Z.000000T0000Z.NO/
600 PM EST TUE MAR 8 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE SUSQUEHANNA BELOW CONOWINGO DAM.
* UNTIL FURTHER NOTICE...OR UNTIL THE WARNING IS CANCELLED.
* AT 5:30 PM TUESDAY THE STAGE WAS 24.2 FEET. 
* FLOOD STAGE IS 23.5 FEET. 
* MINOR FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 24.4 FEET BY THIS 
  EVENING THEN BEGIN FALLING.
* IMPACT...AT 24.8 FEET...NOTIFICATION LEVEL 5 WITH 21 TO 25 GATES OPEN 
  AT CONOWINGO DAM. BACKYARDS AND BASEMENTS ON MAIN STREET AND TOME'S 
  LANDING BEGIN TO FLOOD.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SUSQUEHANNA RIVER
  CONOWINGO DAM    23.5   24.16  TUE 5 PM    24.4  TUE 8 PM 

&&

106 
WGUS81 KPHI 090343
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1043 PM EST TUE MAR 8 2011

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN MARYLAND...
 
  SUSQUEHANNA BELOW CONOWINGO DAM AFFECTING CECIL AND HARFORD COUNTIES 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

MDC015-025-091343-
/O.EXT.KPHI.FL.W.0019.000000T0000Z-110309T1800Z/
/CNWM2.1.ER.110308T2048Z.110308T2215Z.110309T1200Z.NO/
1043 PM EST TUE MAR 8 2011

THE FLOOD WARNING CONTINUES FOR
  THE SUSQUEHANNA BELOW CONOWINGO DAM.
* AT  9:30 PM TUESDAY THE STAGE WAS 23.2 FEET AND FLUCTUATING. 
* FLOOD STAGE IS 23.5 FEET. 
* FORECAST...THE RIVER IS EXPECTED TO GO BACK AND FORTH BETWEEN
  23.0 FEET AND AROUND FLOOD STAGE INTO WEDNESDAY MORNING.
* IMPACT...AT 22.9 FEET...NOTIFICATION LEVEL 3 WITH 16 TO 17 GATES OPEN 
  AT CONOWINGO DAM. MARYLAND ROUTE 222 NORTH OF PORT DEPOSIT CLOSED.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SUSQUEHANNA RIVER
  CONOWINGO DAM    23.5   23.23  TUE 9 PM     CRESTED 

&&

325 
WGUS81 KPHI 090721
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
221 AM EST WED MAR 9 2011

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
MARYLAND...
 
  SUSQUEHANNA BELOW CONOWINGO DAM AFFECTING CECIL AND HARFORD COUNTIES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

MDC015-025-090821-
/O.CAN.KPHI.FL.W.0019.000000T0000Z-110309T1800Z/
/CNWM2.1.ER.110308T2048Z.110308T2215Z.110309T0130Z.NO/
221 AM EST WED MAR 9 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE SUSQUEHANNA BELOW CONOWINGO DAM.
* AT 1:00 AM WEDNESDAY THE STAGE WAS 21.9 FEET AND REMAINING BELOW
  FLOOD STAGE. . 
* FLOOD STAGE IS 23.5 FEET. 
* FORECAST...THE RIVER WILL CONTINUE TO FALL today.
* IMPACT...NO ADDITIONAL IMPACTS ARE EXPECTED FROM THIS EVENT. 

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

SUSQUEHANNA RIVER
  CONOWINGO DAM    23.5   21.86  WED 1 AM     CRESTED 

&&

River Flood Warnings in Maryland, 2011Every river flood warning in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.