323  
WTUS82 KMFL 290315  
HLSMFL  
FLZ063-066>075-168-172>174-291115-  
 
TROPICAL STORM IDALIA LOCAL STATEMENT ADVISORY NUMBER 10  
NATIONAL WEATHER SERVICE MIAMI FL AL102023  
1115 PM EDT MON AUG 28 2023  
 
THIS PRODUCT COVERS SOUTH FLORIDA  
 
**TROPICAL STORM IDALIA CONTINUES TO STRENGTHEN**  
 
NEW INFORMATION  
---------------  
 
* CHANGES TO WATCHES AND WARNINGS:  
- NONE  
 
* CURRENT WATCHES AND WARNINGS:  
- A TROPICAL STORM WARNING AND STORM SURGE WATCH ARE IN EFFECT  
FOR COASTAL COLLIER COUNTY  
- A TROPICAL STORM WATCH IS IN EFFECT FOR INLAND COLLIER COUNTY  
 
* STORM INFORMATION:  
- ABOUT 400 MILES SOUTHWEST OF MIAMI FL OR ABOUT 350 MILES  
SOUTHWEST OF NAPLES FL  
- 22.0N 85.0W  
- STORM INTENSITY 70 MPH  
- MOVEMENT NORTH OR 10 DEGREES AT 8 MPH  
 
SITUATION OVERVIEW  
------------------  
 
TROPICAL STORM IDALIA CONTINUES TO STRENGTHEN IN THE YUCATAN  
CHANNEL THIS EVENING. THE STORM IS FORECAST TO MOVE INTO THE SOUTHEAST  
GULF OF MEXICO OVERNIGHT INTO TUESDAY. IDALIA IS FORECAST TO KEEP  
STRENGTHENING OVER THE EASTERN GULF AS IT MOVES CLOSER TO THE WEST  
COAST OF FLORIDA.  
 
THE FOLLOWING ARE THE PRIMARY HAZARDS OF CONCERN WITH IDALIA:  
 
* COASTAL FLOODING/SURGE - HIGHER THAN USUAL TIDES DUE TO THE  
COMBINATION OF SURGE FROM IDALIA AND THE FULL MOON COULD LEAD TO  
COASTAL FLOODING OF 2 TO 4 FEET IN COASTAL COLLIER COUNTY AND 1 TO  
3 FEET ALONG THE COAST OF MAINLAND MONROE COUNTY. OTHER VULNERABLE  
COASTAL AREAS OF SOUTHERN FLORIDA COULD ALSO EXPERIENCE MINOR COASTAL  
FLOODING, ESPECIALLY AROUND THE TIMES OF HIGH TIDE.  
 
* RAINFALL - THE MAJORITY OF THE RAINFALL ASSOCIATED WITH THE SYSTEM  
IS FORECAST TO FALL THROUGH WEDNESDAY. THE GREATEST RISK FOR FLASH  
FLOODING WILL BE NEAR THE GULF COAST. STORM TOTAL RAIN AMOUNTS OF 2 TO  
3 INCHES WITH LOCALIZED HIGHER AMOUNTS. THE HIGHEST AMOUNTS ARE  
ANTICIPATED ALONG THE GULF COAST.  
 
* WIND - INCREASINGLY GUSTY WINDS ARE FORECAST TUESDAY THROUGH  
THURSDAY, PARTICULARLY ALONG THE GULF COAST AND ADJACENT COASTAL  
WATERS. A REASONABLE WORST CASE SCENARIO WOULD HAVE TROPICAL STORM  
FORCE WINDS ACROSS COLLIER COUNTY BETWEEN TUESDAY MORNING AND  
WEDNESDAY. AREAS OF THE EAST COAST AND ATLANTIC WATERS COULD ALSO SEE  
GUSTY WINDS UP TO 35 MPH DURING THE SAME TIME FRAME.  
 
* TORNADOES - A LOW-END TORNADO THREAT IS POSSIBLE THROUGH EARLY  
THURSDAY AS BANDING FROM THE SYSTEM MOVES ASHORE. THE FOCUS FOR  
TORNADIC ACTIVITY COULD BE IN THE WESTERN HALF OF SOUTHERN FLORIDA.  
 
POTENTIAL IMPACTS  
-----------------  
 
* WIND:  
PROTECT AGAINST HAZARDOUS WIND HAVING POSSIBLE LIMITED IMPACTS ACROSS  
SOUTHWEST FLORIDA. POTENTIAL IMPACTS IN THIS AREA INCLUDE:  
- DAMAGE TO PORCHES, AWNINGS, CARPORTS, SHEDS, AND UNANCHORED  
MOBILE HOMES. UNSECURED LIGHTWEIGHT OBJECTS BLOWN ABOUT.  
- MANY LARGE TREE LIMBS BROKEN OFF. A FEW TREES SNAPPED OR  
UPROOTED, BUT WITH GREATER NUMBERS IN PLACES WHERE TREES ARE  
SHALLOW ROOTED. SOME FENCES AND ROADWAY SIGNS BLOWN OVER.  
- A FEW ROADS IMPASSABLE FROM DEBRIS, PARTICULARLY WITHIN URBAN  
OR HEAVILY WOODED PLACES. HAZARDOUS DRIVING CONDITIONS ON  
BRIDGES AND OTHER ELEVATED ROADWAYS.  
- SCATTERED POWER AND COMMUNICATIONS OUTAGES.  
 
ELSEWHERE ACROSS SOUTH FLORIDA, LITTLE TO NO IMPACT IS ANTICIPATED.  
 
* SURGE:  
PROTECT AGAINST LIFE-THREATENING SURGE HAVING POSSIBLE SIGNIFICANT  
IMPACTS ACROSS COASTAL COLLIER COUNTY. POTENTIAL IMPACTS IN  
THIS AREA INCLUDE:  
- AREAS OF INUNDATION WITH STORM SURGE FLOODING ACCENTUATED BY  
WAVES. DAMAGE TO SEVERAL BUILDINGS, MAINLY NEAR THE COAST.  
- SECTIONS OF NEAR-SHORE ESCAPE ROUTES AND SECONDARY ROADS BECOME  
WEAKENED OR WASHED OUT, ESPECIALLY IN USUALLY VULNERABLE LOW  
SPOTS.  
- MAJOR BEACH EROSION WITH HEAVY SURF BREACHING DUNES. STRONG AND  
NUMEROUS RIP CURRENTS.  
- MODERATE DAMAGE TO MARINAS, DOCKS, BOARDWALKS, AND PIERS.  
SEVERAL SMALL CRAFT BROKEN AWAY FROM MOORINGS, ESPECIALLY IN  
UNPROTECTED ANCHORAGES.  
 
ALSO, PROTECT AGAINST LOCALLY HAZARDOUS SURGE HAVING POSSIBLE LIMITED  
IMPACTS ACROSS COASTAL PORTIONS OF MAINLAND MONROE COUNTY.  
 
ELSEWHERE ACROSS SOUTH FLORIDA, LITTLE TO NO IMPACT IS ANTICIPATED.  
 
* FLOODING RAIN:  
PROTECT AGAINST DANGEROUS RAINFALL FLOODING HAVING POSSIBLE  
SIGNIFICANT IMPACTS ACROSS SOUTHWEST FLORIDA. POTENTIAL  
IMPACTS INCLUDE:  
- MODERATE RAINFALL FLOODING MAY PROMPT SEVERAL EVACUATIONS AND  
RESCUES.  
- DITCHES AND CANALS MAY QUICKLY BECOME SWOLLEN WITH SWIFT  
CURRENTS AND OVERSPILL THEIR BANKS IN A FEW PLACES, ESPECIALLY  
IN USUALLY VULNERABLE SPOTS.  
- FLOOD WATERS CAN ENTER SOME STRUCTURES OR WEAKEN FOUNDATIONS.  
SEVERAL PLACES MAY EXPERIENCE EXPANDED AREAS OF RAPID  
INUNDATION AT UNDERPASSES, LOW-LYING SPOTS, AND POOR DRAINAGE  
AREAS. SOME STREETS AND PARKING LOTS TAKE ON MOVING WATER AS  
STORM DRAINS AND RETENTION PONDS OVERFLOW. DRIVING CONDITIONS  
BECOME HAZARDOUS. SOME ROAD AND BRIDGE CLOSURES.  
 
PROTECT AGAINST LOCALLY HAZARDOUS RAINFALL FLOODING HAVING POSSIBLE  
LIMITED IMPACTS ACROSS THE REST OF SOUTH FLORIDA.  
 
* TORNADOES:  
PROTECT AGAINST A TORNADO EVENT HAVING POSSIBLE LIMITED IMPACTS  
ACROSS SOUTH FLORIDA. POTENTIAL IMPACTS INCLUDE:  
- THE OCCURRENCE OF ISOLATED TORNADOES CAN HINDER THE EXECUTION  
OF EMERGENCY PLANS DURING TROPICAL EVENTS.  
- A FEW PLACES MAY EXPERIENCE TORNADO DAMAGE, ALONG WITH POWER  
AND COMMUNICATIONS DISRUPTIONS.  
- LOCATIONS COULD REALIZE ROOFS PEELED OFF BUILDINGS, MOBILE  
HOMES PUSHED OFF FOUNDATIONS OR OVERTURNED, LARGE TREE TOPS AND  
BRANCHES SNAPPED OFF, SHALLOW-ROOTED TREES KNOCKED OVER, MOVING  
VEHICLES BLOWN OFF ROADS, AND SMALL BOATS PULLED FROM MOORINGS.  
 
ELSEWHERE ACROSS SOUTH FLORIDA, LITTLE TO NO IMPACT IS ANTICIPATED.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS  
----------------------------------  
 
* EVACUATIONS:  
LISTEN TO LOCAL OFFICIAL FOR RECOMMENDED PREPAREDNESS ACTIONS, INCLUDING  
POSSIBLE EVACUATION. IF ORDERED TO EVACUATE, DO SO IMMEDIATELY.  
 
FOR THOSE NOT UNDER EVACUATION ORDERS, ASSESS THE RISK FROM WIND, FALLING  
TREES, AND FLOODING AT YOUR LOCATION. IF YOU DECIDE TO MOVE, RELOCATE TO  
A SAFER LOCATION NEARBY. IF YOU DO NOT RELOCATE, HELP KEEP ROADWAYS OPEN  
FOR THOSE UNDER EVACUATION ORDERS.  
 
* OTHER PREPAREDNESS INFORMATION:  
NOW IS THE TIME TO COMPLETE ALL PREPARATIONS TO PROTECT LIFE AND  
PROPERTY IN ACCORDANCE WITH YOUR EMERGENCY PLAN. ENSURE YOU ARE IN A  
SAFE LOCATION BEFORE THE ONSET OF STRONG WINDS OR POSSIBLE FLOODING.  
 
KEEP CELL PHONES WELL CHARGED. CELL PHONE CHARGERS FOR AUTOMOBILES  
CAN BE HELPFUL, BUT BE AWARE OF YOUR RISK FOR DEADLY CARBON MONOXIDE  
POISONING IF YOUR CAR IS LEFT IDLING IN A GARAGE OR OTHER POORLY  
VENTILATED AREA.  
 
IF YOU ARE A VISITOR, BE SURE TO KNOW THE NAME OF THE CITY OR TOWN IN  
WHICH YOU ARE STAYING AND THE NAME OF THE COUNTY OR PARISH IN WHICH  
IT RESIDES. LISTEN FOR THESE LOCATIONS IN LOCAL NEWS UPDATES. PAY  
ATTENTION FOR INSTRUCTIONS FROM LOCAL AUTHORITIES.  
 
STORM SURGE IS THE LEADING KILLER ASSOCIATED WITH TROPICAL STORMS AND  
HURRICANES! MAKE SURE YOU ARE IN A SAFE AREA AWAY FROM THE SURGE  
ZONE. EVEN IF YOU ARE NOT IN A SURGE-PRONE AREA, YOU COULD FIND  
YOURSELF CUTOFF BY FLOOD WATERS DURING AND AFTER THE STORM. HEED  
EVACUATION ORDERS ISSUED BY THE LOCAL AUTHORITIES.  
 
CLOSELY MONITOR WEATHER.GOV, NOAA WEATHER RADIO OR LOCAL NEWS OUTLETS  
FOR OFFICIAL STORM INFORMATION. BE READY TO ADAPT TO POSSIBLE CHANGES  
TO THE FORECAST. ENSURE YOU HAVE MULTIPLE WAYS TO RECEIVE WEATHER  
WARNINGS.  
 
* ADDITIONAL SOURCES OF INFORMATION:  
- FOR INFORMATION ON APPROPRIATE PREPARATIONS SEE READY.GOV  
- FOR INFORMATION ON CREATING AN EMERGENCY PLAN SEE GETAGAMEPLAN.ORG  
- FOR ADDITIONAL DISASTER PREPAREDNESS INFORMATION SEE REDCROSS.ORG  
 
NEXT UPDATE  
-----------  
 
THE NEXT LOCAL STATEMENT WILL BE ISSUED BY THE NATIONAL WEATHER  
SERVICE IN MIAMI FL AROUND 5 AM EDT, OR SOONER IF CONDITIONS WARRANT.  
 

 
 
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