651  
WTUS82 KMFL 281810 AAA  
HLSMFL  
FLZ063-066>075-168-172>174-290215-  
 
TROPICAL STORM IDALIA LOCAL STATEMENT INTERMEDIATE ADVISORY NUMBER 8A...UPDATED  
NATIONAL WEATHER SERVICE MIAMI FL AL102023  
210 PM EDT MON AUG 28 2023  
 
THIS PRODUCT COVERS SOUTH FLORIDA  
 
**TROPICAL STORM WARNING AND STORM SURGE WATCH CONTINUES FOR COASTAL  
COLLIER COUNTY**  
 
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 440 MILES SOUTHWEST OF MIAMI FL OR ABOUT 400 MILES  
SOUTH-SOUTHWEST OF NAPLES FL  
- 21.2N 85.1W  
- STORM INTENSITY 70 MPH  
- MOVEMENT NORTH OR 360 DEGREES AT 8 MPH  
 
SITUATION OVERVIEW  
------------------  
 
TROPICAL STORM IDALIA CONTINUES TO STRENGTHEN IN THE YUCATAN CHANNEL  
TODAY. THE STORM IS FORECAST TO MOVE INTO THE SOUTHEAST GULF OF MEXICO  
TONIGHT 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 FROM THIS AFTERNOON 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 MONDAY NIGHT 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  
-----------------  
 
* 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 LOCALLY HAZARDOUS RAINFALL FLOODING HAVING POSSIBLE  
LIMITED IMPACTS ACROSS SOUTH FLORIDA. POTENTIAL IMPACTS INCLUDE:  
- LOCALIZED RAINFALL FLOODING MAY PROMPT A FEW EVACUATIONS.  
- DITCHES AND CANALS MAY QUICKLY RISE WITH SWIFT CURRENTS.  
- FLOOD WATERS CAN ENTER A FEW STRUCTURES, ESPECIALLY IN USUALLY  
VULNERABLE SPOTS. A FEW PLACES WHERE RAPID PONDING OF WATER  
OCCURS AT UNDERPASSES, LOW-LYING SPOTS, AND POOR DRAINAGE  
AREAS. SEVERAL STORM DRAINS AND RETENTION PONDS BECOME  
NEAR-FULL AND BEGIN TO OVERFLOW. SOME BRIEF ROAD AND BRIDGE  
CLOSURES.  
 
* 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.  
 
* 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.  
 
IF YOU ARE RELOCATING TO SAFE SHELTER, LEAVE AS EARLY AS POSSIBLE.  
ALLOW EXTRA TIME TO REACH YOUR DESTINATION. MANY ROADS AND BRIDGES  
WILL BE CLOSED ONCE STRONG WINDS ARRIVE. CHECK THE LATEST WEATHER  
FORECAST BEFORE DEPARTING AND DRIVE WITH CAUTION.  
 
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.  
 
RAPIDLY RISING FLOOD WATERS ARE DEADLY. IF YOU ARE IN A FLOOD-PRONE  
AREA, CONSIDER MOVING TO HIGHER GROUND. NEVER DRIVE THROUGH A FLOODED  
ROADWAY. REMEMBER, TURN AROUND DON'T DROWN!  
 
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 PM EDT, OR SOONER IF CONDITIONS WARRANT.  
 

 
 
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