033  
NOUS41 KLWX 151349  
PNSLWX  
DCZ001-MDZ001-003>006-008-011-013-014-016>018-501>508-VAZ025>031-  
036>040-050>057-501>508-WVZ050>053-055-501>506-160200-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
949 AM EDT MON AUG 15 2022  
 
PNSLWX  
SERVICE CHANGE NOTICE  
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON  
0945 AM EASTERN DAYLIGHT MONDAY AUGUST 15TH, 2022  
 
TO: SUBSCRIBERS:  
-FAMILY OF SERVICES  
-NOAA WEATHER WIRE SERVICE  
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK  
OTHER NWS PARTNERS, USERS, AND EMPLOYEES  
 
FROM: JAMES E. LEE, METEOROLOGIST IN CHARGE, WEATHER FORECAST  
OFFICE BALTIMORE/WASHINGTON  
 
SUBJECT: CHANGES IN FLOOD CATEGORIES FOR USGS STREAM GAUGE JONES  
FALLS AT SORRENTO, MD IN BALTIMORE COUNTY.  
 
...CHANGES IN FLOOD CATEGORIES ON JONES FALLS AT SORRENTO, MD ON  
THE MOORES BRANCH (SRTM2)...  
 
EFFECTIVE AT 1800 COORDINATED UNIVERSAL TIME ON 08/11/2022, THE NATIONAL  
WEATHER SERVICE CHANGED THE FLOOD CATEGORY STAGES FOR THE STREAM  
GAGE AT JONES FALLS AT SORRENTO, MD ON THE MOORES BRANCH IN  
BALTIMORE COUNTY.  
 
BECAUSE OF THIS CHANGE, STARTING ON THURSDAY AUGUST 11TH, 2022, FLOOD  
WARNINGS AND FLOOD STATEMENTS WILL REFERENCE THE NEW CATEGORY  
LEVELS. THIS CHANGE IS PART OF A RECENT RE-SITING OF THE GAUGE AND  
RE-EVALUATION OF THE FLOOD PLAIN WITH THE UNITED STATES  
GEOLOGICAL SURVEY.  
 
THE NEW FLOOD CATEGORY LEVELS WILL BE AS FOLLOWS:  
 
1. NEW ACTION STAGE IS 14.0 FEET ABOVE NORTH AMERICAN VERTICAL DATUM  
OF 1988 (NAVD 88). THE PREVIOUS FLOOD STAGE WAS 10.0 FEET ABOVE  
NAVD 88.  
 
2. NEW FLOOD STAGE IS 17.0 FEET ABOVE NAVD 88. THE PREVIOUS FLOOD  
STAGE WAS 13.0 FEET ABOVE NAVD 88.  
 
3. NEW MODERATE FLOOD STAGE IS 19.0 FEET ABOVE NAVD 88. THE  
PREVIOUS MODERATE FLOOD STAGE WAS 15.0 FEET ABOVE NAVD 88.  
 
4. NEW MAJOR FLOOD STAGE IS 22.0 FEET ABOVE NAVD 88. THE PREVIOUS  
MAJOR FLOOD STAGE WAS 18.0 FEET ABOVE NAVD 88.  
 
THE NATIONAL WEATHER SERVICE WELCOMES PUBLIC FEEDBACK. IF YOU HAVE  
ANY QUESTIONS OR COMMENTS ON THIS CHANGE, PLEASE CONTACT:  
 
JEREMY GEIGER  
SENIOR SERVICE HYDROLOGIST  
NATIONAL WEATHER SERVICE FORECAST OFFICE BALTIMORE/WASHINGTON  
43858 WEATHER SERVICE RD.  
STERLING, VA 20166  
PHONE: 571-888-3500  
E-MAIL: JEREMY.GEIGER@NOAA.GOV  
 

 
 
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