Alert archive / Florida / Areal Flood Advisories in 2021
Areal Flood Advisory 65, NWS Miami, FL
NWS Miami, FL issued this areal flood advisory at Jul 20, 2021, 12:45 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2021, 12:45 PM EDT (16:45 UTC)
- Expired
- Jul 20, 2021, 4:04 PM EDT
- In force
- 3 hr
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
Counties Broward County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 88 km from the middle of the area, began a volume at 16:44 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, 4.8 hours before the alert went out and 66 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
- 2142 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 757 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 23 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 Jul 20, 9:59 AM EDT, 2 hours 46 minutes earlier.
Area forecast discussion, Jul 20, 9:59 AM EDT, 2 hours 46 minutes before
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</html>Hazardous weather outlook, Jul 20, 9:52 AM EDT, 2 hours 53 minutes before
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 952 AM EDT Tue Jul 20 2021 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 210200- 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- 952 AM EDT Tue Jul 20 2021 ...SCATTERED TO NUMEROUS STORMS THIS AFTERNOON... ...LOCALIZED FLOODING POSSIBLE WITH HEAVIEST DOWNPOURS... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: scattered to numerous thunderstorms, especially over the east coast metro areas and Lake Okeechobee region. The primary impacts will be lightning strikes, gusty winds, and locally heavy rainfall. Wind: A few storms could be strong enough to produce wind gusts up to 45mph. Flooding: Localized flooding is possible with the heaviest downpours, and instances of multiple rounds of heavy rain over the same location. Waterspouts: There is a slight chance of waterspouts over the Atlantic waters this morning then over Lake Okeechobee and Gulf waters this afternoon. Temperature: Apparent temperatures will reach the slight to moderate range, with possible values of 105 to 108 over much of the interior this afternoon. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Scattered thunderstorms are possible each day, with the greatest coverage expected over the western half of South Florida during the afternoon hours. Heat indices are forecast to climb into the low 100s as the week progresses. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. For more information...visit the National Weather Service in Miami website at www.weather.gov/miami.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 1:51 PM EDT | Special Weather Statement | MFL | Palm Beach | 39 min |
| Jul 20, 2:20 PM EDT | Special Weather Statement | MFL | Miami-Dade | 40 min |
| Jul 20, 3:03 PM EDT | Special Weather Statement | MFL | Hendry | 42 min |
| Jul 20, 4:04 PM EDT | Flash Flood Warning | MFL | Broward | 99 min |
| Jul 20, 4:37 PM EDT | Areal Flood Advisory | MFL | Broward, Palm Beach | 66 min |
| Jul 20, 4:45 PM EDT | Special Weather Statement | MFL | Broward | 45 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.