034  
WHUS54 KHGX 220552  
SMWHGX  
GMZ355-375-220645-  
/O.NEW.KHGX.MA.W.0036.180422T0552Z-180422T0645Z/  
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SPECIAL MARINE WARNING  
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX  
1252 AM CDT SUN APR 22 2018  
 
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A  
 
* SPECIAL MARINE WARNING FOR...  
COASTAL WATERS FROM HIGH ISLAND TO FREEPORT TX OUT 20 NM...  
WATERS FROM HIGH ISLAND TO FREEPORT TX FROM 20 TO 60 NM...  
 
* UNTIL 145 AM CDT.  
 
* AT 1250 AM CDT...SEVERE THUNDERSTORMS CAPABLE OF PRODUCING  
WATERSPOUTS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR HIGH  
ISLAND 63 TO NEAR GALVESTON 150 TO GALVESTON 221...MOVING EAST AT  
30 KNOTS.  
 
HAZARD...WATERSPOUTS AND WIND GUSTS TO NEARLY 50 KNOTS.  
 
SOURCE...A WEATHERFLOW SITE HAS REPORTED A GUST TO 45 KNOTS WITH  
THIS STORM.  
 
IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY  
HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY  
HIGHER WINDS AND SUDDENLY HIGHER WAVES.  
 
* LOCATIONS IMPACTED INCLUDE...  
GALVESTON 150...HIGH ISLAND 157...HEALD BANK...HIGH ISLAND A23...  
HIGH ISLAND 63...HIGH ISLAND A179...BUOY 42035...HIGH ISLAND A61...  
GALVESTON 256...HIGH ISLAND 208 AND GALVESTON 221.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE  
EXPECTED.  
 
THUNDERSTORMS CAN PRODUCE SUDDEN WATERSPOUTS. WATERSPOUTS CAN EASILY  
OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR  
IMMEDIATELY.  
 
REPORT SEVERE WEATHER TO THE COAST GUARD OR THE NATIONAL WEATHER  
SERVICE.  
 

 
 
LAT...LON 2878 9436 2903 9492 2919 9472 2953 9438  
2898 9417  
TIME...MOT...LOC 0550Z 267DEG 28KT 2948 9440 2919 9468 2908 9486  
 
WATERSPOUT...POSSIBLE  
HAIL...0.00IN  
WIND...49KTS  
 

 
 
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