Alert archive / Florida / Areal Flood Advisories in 2021
Areal Flood Advisory 111, NWS Miami, FL
NWS Miami, FL issued this areal flood advisory at Aug 4, 2021, 11:15 AM EDT for Collier County, Florida. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 4, 2021, 11:15 AM EDT (15:15 UTC)
- Expired
- Aug 4, 2021, 2:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
County Collier County, FL
The radar
The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 15:19 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 3.3 hours before the alert went out and 113 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 903 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Miami, FL wrote its last area forecast discussion before this areal flood advisory went out at Aug 4, 9:40 AM EDT, 1 hour 35 minutes earlier.
Area forecast discussion, Aug 4, 9:40 AM EDT, 1 hour 35 minutes before
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</html>Hazardous weather outlook, Aug 4, 9:42 AM EDT, 1 hour 33 minutes before
Hazardous Weather Outlook for South Florida...UPDATED National Weather Service Miami FL 942 AM EDT Wed Aug 4 2021 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 050100- Lake Okeechobee-Biscayne Bay- Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM- Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM- Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM- Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of Bahamas-Glades-Hendry- Inland Palm Beach-Metro Palm Beach-Coastal Collier-Inland Collier- Inland Broward-Metro Broward-Inland Miami-Dade-Metro Miami-Dade- Mainland Monroe-Coastal Palm Beach-Coastal Broward-Coastal Miami- Dade-Far South Miami-Dade- Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM- Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM- Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM- 942 AM EDT Wed Aug 4 2021 ...Scattered To Numerous Storms Expected With Heavy Rainfall... ...A Few Strong Storms Possible This Afternoon East Coast Metro Areas... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: Scattered to numerous thunderstorms are expected, mainly this morning through early afternoon over Southwest Florida, and from midday through the early evening across Southeast Florida. Frequent lightning, heavy downpours, funnel clouds, and gusty winds will be the primary potential hazards with the strongest thunderstorms. Flooding: Localized flooding is possible due to heavy downpours from thunderstorms over low-lying and poor drainage areas, especially in Southwest Florida this morning, and Southeast Florida this afternoon and evening. Wind: A few strong storms could produce wind gusts in excess of 45 mph. Tornadoes: A weak tornado or two are possible along eastern areas this afternoon. Waterspouts: Waterspouts are possible across the South Florida waters today, especially in the Atlantic waters and Biscayne Bay. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Scattered to numerous showers and thunderstorms will be possible across South Florida for the rest of this week and into the upcoming weekend with the focus shifting to the interior and west coast metro areas. In addition, a few strong storms could develop with locally gusty winds, waterspouts, heavy rainfall, and frequent lightning strikes. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however individual spotters are encouraged to report high wind, hail and flooding to the National Weather Service forecast office in Miami. For more information...visit the National Weather Service in Miami website at www.weather.gov/miami. Molleda
In the hours before
Local storm report, Aug 4, 10:40 AM EDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1040 AM EDT WED AUG 4 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0810 PM TSTM WND DMG 3 SSE KENDALE LAKES 25.67N 80.41W
08/03/2021 MIAMI-DADE FL NWS EMPLOYEE
A MEDIUM-LARGE TREE WAS UPROOTED NEAR THE
INTERSECTION OF SW 130 AVENUE AND KILLIAN
PARKWAY IN WEST KENDALL. VERY SMALL BRANCHES
AND LEAVES WERE SCATTERED ACROSS THE GENERAL
AREA FROM STRONG WINDS ASSOCIATED WITH THE
STORM.
&&
RMThe office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 8:00 PM EDT | Special Weather Statement | MFL | Miami-Dade | 60 min |
| Aug 3, 8:11 PM EDT | Special Weather Statement | MFL | Miami-Dade | 49 min |
| Aug 3, 8:16 PM EDT | Areal Flood Advisory | MFL | Miami-Dade | 119 min |
| Aug 3, 8:27 PM EDT | Areal Flood Advisory | MFL | Miami-Dade | 2 hr |
| Aug 3, 9:29 PM EDT | Special Weather Statement | MFL | Miami-Dade | 61 min |
| Aug 4, 7:49 AM EDT | Areal Flood Advisory | MFL | Collier | 2 hr |
| Aug 4, 8:44 AM EDT | Areal Flood Advisory | MFL | Collier | 2 hr |
| Aug 4, 11:53 AM EDT | Special Marine Warning | MFL | 67 min | |
| Aug 4, 12:02 PM EDT | Special Weather Statement | MFL | Broward | 43 min |
| Aug 4, 12:40 PM EDT | Special Weather Statement | MFL | Broward | 35 min |
| Aug 4, 12:58 PM EDT | Special Marine Warning | MFL | 62 min | |
| Aug 4, 1:11 PM EDT | Areal Flood Advisory | MFL | Broward, Miami-Dade | 2 hr |
| Aug 4, 1:11 PM EDT | Special Weather Statement | MFL | Broward | 64 min |
| Aug 4, 1:25 PM EDT | Areal Flood Advisory | MFL | Broward, Palm Beach | 2 hr |
| Aug 4, 3:18 PM EDT | Areal Flood Advisory | MFL | Miami-Dade | 117 min |
Nearby
Areal Flood Advisories in Florida, 2021Every areal flood advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.