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Flash Flood Guidance (FFG)

Issued by National Weather Service (NWS)

                            
445 
FOUS61 KRHA 201350
FFGMD 
COUNTY FLASH FLOOD GUIDANCE FOR MARYLAND AND DC                         
MIDDLE ATLANTIC RIVER FORECAST CENTER                                   
NATIONAL WEATHER SERVICE STATE COLLEGE PA                               
932 AM EDT SUN MAY 20 2018
                                                                        
APPROXIMATE 1/3/6/12-HR RAINFALL (INCHES) NEEDED TO BEGIN               
SMALL STREAM FLOODING.  THIS GUIDANCE IS NOT APPLICABLE FOR             
URBAN, BASEMENT, OR OTHER FLOODING NOT ASSOCIATED WITH A STREAM.        
                                                                       
.B RHA 180520 Z DH12/DC1805201332 /DUE/PPHCF/PPTCF/PPQCF/PPKCF
:                                                                       
:IDENT    1HR   3HR   6HR  12HR  ZONE NAME
:======= ====  ====  ====  ====  ====================
:                                                                       
: NWS STERLING SERVICE AREA...                                          
DCZ001    0.4/  0.8/  0.9/  1.0 :Washington DC      
MDZ501    0.5/  0.9/  1.0/  1.0 :Extreme W. Allegany Co.
MDZ502    0.7/  1.2/  1.2/  1.3 :Central and E. Allegany Co.
MDZ014    0.9/  1.7/  1.8/  2.0 :Anne Arundel Co.   
MDZ006    0.7/  1.3/  1.4/  1.6 :N. Baltimore Co.   
MDZ011    0.6/  1.1/  1.2/  1.3 :S. Baltimore Co.   
MDZ018    0.9/  1.7/  1.9/  2.1 :Calvert Co.        
MDZ005    0.7/  1.3/  1.4/  1.6 :Carroll Co.        
MDZ016    1.0/  1.9/  2.0/  2.2 :Charles Co.        
MDZ004    0.7/  1.3/  1.4/  1.5 :Frederick Co.      
MDZ507    0.8/  1.4/  1.5/  1.7 :NW. Harford Co.    
MDZ508    0.9/  1.7/  1.8/  2.0 :SE. Harford Co.    
MDZ505    0.7/  1.3/  1.4/  1.6 :NW. Howard Co.     
MDZ506    0.7/  1.3/  1.4/  1.6 :Central and SE. Howard Co.
MDZ503    0.8/  1.4/  1.5/  1.7 :NW. Montgomery Co. 
MDZ504    0.6/  1.2/  1.2/  1.4 :Central and SE. Montgomery Co.
MDZ013    0.9/  1.7/  1.8/  2.0 :Prince Georges Co. 
MDZ017    0.8/  1.5/  1.7/  1.9 :St. Marys Co.      
MDZ003    0.8/  1.4/  1.5/  1.6 :Washington Co.     
:                                                                       
: NWS MT. HOLLY SERVICE AREA...                                         
MDZ020    0.9/  1.7/  1.9/  2.1 :Caroline Co.       
MDZ008    1.0/  1.9/  2.1/  2.3 :Cecil Co.          
MDZ012    1.0/  1.8/  2.0/  2.2 :Kent Co.           
MDZ015    0.9/  1.7/  1.8/  2.0 :Queen Annes Co.    
MDZ019    0.8/  1.6/  1.7/  1.9 :Talbot Co.         
:                                                                       
: NWS WAKEFIELD SERVICE AREA...                                         
MDZ021    0.8/  1.5/  1.6/  1.8 :Dorchester Co.     
MDZ023    1.1/  2.1/  2.2/  2.4 :Somerset Co.       
MDZ022    0.9/  1.6/  1.8/  1.9 :Wicomico Co.       
MDZ024    1.2/  2.1/  2.3/  2.5 :Inland Worcester   
MDZ025    1.1/  2.1/  2.2/  2.5 :Maryland Beaches   
.END
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