Alert archive / Florida / Special Weather Statements in 2020

Special Weather Statement, NWS Miami, FL

April 18, 2020Broward County, Palm Beach County, Florida

NWS Miami, FL issued this special weather statement at Apr 18, 2020, 1:53 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 18, 2020, 1:53 PM EDT (17:53 UTC)
Expired
Apr 18, 2020, 3:00 PM EDT
In force
67 min
Issued by
NWS Miami, FL

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 17:57 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, 5.9 hours before the alert went out and 108 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.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2020-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 758 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2020-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
758 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
925 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 18, 1:44 PM EDT, 9 minutes earlier.

Area forecast discussion, Apr 18, 1:44 PM EDT, 9 minutes before
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Hazardous weather outlook, Apr 18, 7:57 AM EDT, 5 hours 56 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
757 AM EDT Sat Apr 18 2020

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
190000-
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-
757 AM EDT Sat Apr 18 2020

...Flooding Possible East Coast Metro Areas...
..A Few Severe Thunderstorms Possible...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Flooding: flooding of urban and poorly drained areas is possible this
afternoon and evening for the east coast metro areas. The greatest
risk is across Palm Beach County where heavy rain fell recently.
Although uncertain, flash flooding is also possible, with the
greatest risk for this being across Palm Beach County.

Wind: strong to locally damaging wind gusts up to 60 mph are
possible this afternoon. The greatest risk for this is across Palm
Beach, Broward, and northern Miami-Dade Counties.

Tornadoes: a tornado is possible this afternoon, with the greatest
risk across Palm Beach, Broward, and northern Miami-Dade Counties.

Rip Currents: There is a moderate risk of rip currents along the
beaches of Palm Beach County this morning.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Patchy fog will be possible early Sunday across the interior
portions of south Florida.

There is a low chance of thunderstorms over South Florida Sunday
along the Sea or Gulf Breezes and again early next week with another
cold frontal passage.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon. Please relay any
information about observed severe weather to the NWS while following
all local, state, and CDC guidelines.

For more information...visit the National Weather Service in
Miami website at www.weather.gov/miami.

In the hours before

Special weather statement, Apr 18, 1:53 PM EDT, 0 minutes before
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The office that day

Everything else NWS Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 8:03 PM EDTSpecial Weather StatementMFLPalm Beach57 min
Apr 17, 8:08 PM EDTSpecial Weather StatementMFLGlades52 min
Apr 17, 8:22 PM EDTSpecial Weather StatementMFLGlades53 min
Apr 17, 8:47 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
Apr 17, 10:10 PM EDTAreal Flood AdvisoryMFLPalm Beach2 hr
Apr 17, 10:26 PM EDTSpecial Marine WarningMFL64 min
Apr 17, 10:56 PM EDTSpecial Weather StatementMFLPalm Beach64 min
Apr 17, 11:12 PM EDTSpecial Marine WarningMFL63 min
Apr 18, 12:03 AM EDTSpecial Weather StatementMFLPalm Beach57 min
Apr 18, 12:12 AM EDTSpecial Marine WarningMFL63 min
Apr 18, 1:13 AM EDTSpecial Marine WarningMFL62 min
Apr 18, 2:12 AM EDTSpecial Marine WarningMFL63 min
Apr 18, 2:29 PM EDTSpecial Marine WarningMFL83 min
Apr 18, 2:34 PM EDTSpecial Marine WarningMFL116 min
Apr 18, 2:35 PM EDTSpecial Weather StatementMFLMiami-Dade25 min
Apr 18, 2:42 PM EDTSpecial Weather StatementMFLBroward63 min
Apr 18, 2:53 PM EDTSpecial Marine WarningMFL97 min
Apr 18, 2:58 PM EDTSpecial Weather StatementMFLBroward, Palm Beach47 min
Apr 18, 3:05 PM EDTSpecial Weather StatementMFLBroward25 min
Apr 18, 3:08 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade66 min
Apr 18, 4:15 PM EDTSpecial Marine WarningMFL2 hr
Apr 18, 6:14 PM EDTSpecial Marine WarningMFL61 min

Nearby

Special Weather Statements in Florida, 2020Every special weather statement in 2020

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.