Alert archive / Florida / Special Weather Statements in 2020

Special Weather Statement, NWS Miami, FL

April 30, 2020Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Apr 30, 2020, 3:50 PM EDT for Miami-Dade County, Florida. It was in force for 40 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 30, 2020, 3:50 PM EDT (19:50 UTC)
Expired
Apr 30, 2020, 4:30 PM EDT
In force
40 min
Issued by
NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 40 km from the middle of the area, began a volume at 19:52 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, 7.8 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.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2020-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 957 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 2020-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
957 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1010 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

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 30, 3:00 PM EDT, 50 minutes earlier.

Area forecast discussion, Apr 30, 3:00 PM EDT, 50 minutes before
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Hazardous weather outlook, Apr 30, 11:07 AM EDT, 4 hours 43 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
1107 AM EDT Thu Apr 30 2020

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
010315-
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-
1107 AM EDT Thu Apr 30 2020

...STRONG OR SEVERE THUNDERSTORMS POSSIBLE TODAY...
...HIGH RISK OF RIP CURRENTS ALONG THE PALM BEACHES...

This hazardous weather outlook is for South Florida.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Rip currents: There is a high risk of rip current across the Palm
Beach beaches today and a moderate risk across the Broward, Miami
Dade, and Collier county beaches.

Thunderstorms: Showers are likely across South Florida today along
with a chance of thunderstorm. Some of the thunderstorms could be
strong or even severe with frequent lightning, gusty winds, hail, and
locally heavy rainfall possible.

Waterspouts: There is a low risk of waterspouts with the storms today
across the coastal waters.

Wind: The strongest storms will be capable of producing wind gusts
in excess of 40 to 60 mph.

Hail: Hail is possible with the strongest storms today. The
strongest storms will be capable of producing at least small hail.

Flooding: Locally heavy rainfall with some ponding of water on
roadways possible, particularly along the east coast.

Tornado: There is a chance of funnel clouds or an isolated tornado
over the east coast metro today, if a sea breeze boundary can
develop.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

The risk of rip currents will decrease by Friday with an elevated
risk returning for northern portions of palm beach county by the
weekend. Otherwise, no hazardous weather is anticipated at this time
through the period.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, however individual
spotters are encouraged to 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

Local storm report, Apr 30, 3:17 PM EDT, 33 minutes before
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Local storm report, Apr 30, 3:24 PM EDT, 26 minutes before
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Local storm report, Apr 30, 3:25 PM EDT, 25 minutes before
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Local storm report, Apr 30, 3:35 PM EDT, 15 minutes before
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Local storm report, Apr 30, 3:47 PM EDT, 3 minutes before
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Special weather statement, Apr 30, 3:50 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 30, 7:25 AM EDTSpecial Marine WarningMFL65 min
Apr 30, 7:48 AM EDTSpecial Weather StatementMFLCollier57 min
Apr 30, 8:22 AM EDTSpecial Marine WarningMFL68 min
Apr 30, 8:34 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry56 min
Apr 30, 8:59 AM EDTSpecial Marine WarningMFL61 min
Apr 30, 9:17 AM EDTSpecial Weather StatementMFLHendry, Palm Beach88 min
Apr 30, 9:40 AM EDTSpecial Marine WarningMFL95 min
Apr 30, 9:57 AM EDTSpecial Marine WarningMFL33 min
Apr 30, 10:03 AM EDTSpecial Weather StatementMFLPalm Beach72 min
Apr 30, 10:26 AM EDTSpecial Marine WarningMFL94 min
Apr 30, 10:39 AM EDTSpecial Marine WarningMFL96 min
Apr 30, 11:14 AM EDTSpecial Weather StatementMFLCollier46 min
Apr 30, 11:50 AM EDTSpecial Weather StatementMFLCollier40 min
Apr 30, 12:01 PM EDTSevere Thunderstorm WarningMFLBroward, Collier, Hendry17 min
Apr 30, 12:05 PM EDTSpecial Marine WarningMFL55 min
Apr 30, 12:09 PM EDTSpecial Weather StatementMFLCollier51 min
Apr 30, 12:13 PM EDTSevere Thunderstorm WarningMFLCollier32 min
Apr 30, 12:38 PM EDTSpecial Weather StatementMFLBroward, Palm Beach67 min
Apr 30, 12:43 PM EDTSpecial Weather StatementMFLBroward47 min
Apr 30, 12:45 PM EDTSpecial Marine WarningMFL60 min
Apr 30, 1:01 PM EDTSpecial Weather StatementMFLMiami-Dade, Monroe44 min
Apr 30, 1:20 PM EDTSevere Thunderstorm WarningMFLMiami-Dade55 min
Apr 30, 1:22 PM EDTSpecial Marine WarningMFL83 min
Apr 30, 1:37 PM EDTSpecial Weather StatementMFLBroward53 min
Apr 30, 1:42 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade48 min
Apr 30, 1:43 PM EDTSpecial Marine WarningMFL62 min
Apr 30, 1:48 PM EDTSpecial Marine WarningMFL87 min
Apr 30, 2:00 PM EDTSevere Thunderstorm WarningMFLBroward29 min
Apr 30, 2:28 PM EDTSpecial Marine WarningMFL92 min
Apr 30, 3:08 PM EDTSpecial Weather StatementMFLMonroe52 min
Apr 30, 3:18 PM EDTSpecial Marine WarningMFL42 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.