Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

April 20, 2012Broward County, Florida

NWS Miami, FL issued this special weather statement at Apr 20, 2012, 10:11 PM EDT for Broward County, Florida. It was in force for 34 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 20, 2012, 10:11 PM EDT (02:11 UTC)
Expired: Apr 20, 2012, 10:45 PM EDT
In force: 34 min
Issued by: NWS Miami, FL

County Broward County, FL

The radar

The Miami radar (KAMX), 44 km from the middle of the area, began a volume at 02:11 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 00:00Z, 2.2 hours before the alert went out and 19 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1605 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 20, 10:08 PM EDT, 3 minutes earlier.

Area forecast discussion, Apr 20, 10:08 PM EDT, 3 minutes before

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Hazardous weather outlook, Apr 20, 4:56 PM EDT, 5 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
456 PM EDT FRI APR 20 2012

AMZ610-630-FLZ063-066>075-168-172>174-210400-
LAKE OKEECHOBEE-BISCAYNE BAY-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-
456 PM EDT FRI APR 20 2012

...SCATTERED THUNDERSTORMS THIS EVENING AND AGAIN LATE TONIGHT...
...STRONG TO SEVERE THUNDERSTORMS POSSIBLE LATE TONIGHT THROUGH THIS WEEKEND...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TONIGHT

THUNDERSTORMS: THERE IS A CHANCE OF THUNDERSTORMS THIS EVENING
MAINLY OVER THE EASTERN HALF OF THE SOUTH FLORIDA PENINSULA. LATE
TONIGHT, AN AREA OF SHOWERS AND THUNDERSTORMS OVER THE GULF IS
EXPECTED TO MOVE EAST INTO THE REGION. THE MAIN IMPACT FROM ANY
STORMS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING STRIKES, LOCALLY
HEAVY RAIN, AND GUSTY WINDS.

WATERSPOUTS: INCREASING SHOWERS AND THUNDERSTORMS OVER THE GULF
WATERS LATE TONIGHT ALONG WITH FAVORABLE WIND PROFILES WILL LEAD
TO A SLIGHT RISK OF WATERSPOUTS OFF THE SOUTHWEST FLORIDA COAST.

WIND: ANY THUNDERSTORMS THIS EVENING AND AGAIN OVERNIGHT WILL BE CAPABLE
OF PRODUCING WIND GUSTS TO AROUND 45 TO 50 MPH.

RIP CURRENTS: MODERATE SOUTHEASTERLY WINDS WILL CREATE A MODERATE
RISK OF RIP CURRENTS ALONG THE ATLANTIC COAST BEACHES.

FLOODING: ANY THUNDERSTORMS OR HEAVY SHOWERS THIS EVENING AND
OVERNIGHT WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL WITH
LOCALIZED MINOR FLOODING OF LOW LYING AND POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SEVERE THUNDERSTORMS AHEAD OF A STRONG DEVELOPING COLD FRONT MAY
OCCUR ACROSS SOUTH FLORIDA THIS WEEKEND. ACCORDING TO THE LATEST
FORECAST, CONDITIONS COULD BE MOST FAVORABLE LATER ON SATURDAY
INTO EARLY SUNDAY. AT THIS TIME, ANY SEVERE THUNDERSTORMS THAT
DEVELOP COULD SUPPORT ISOLATED TORNADOES, DAMAGING WIND GUSTS AND
POSSIBLY LARGE HAIL. FORECAST DETAILS ON THIS POTENTIAL SEVERE
WEATHER WILL BE FURTHER REFINED, SO STAY TUNED TO THE LATEST
FORECAST UPDATES.

MARINE CONDITIONS WILL ALSO DETERIORATE AHEAD OF THE FRONT AS EARLY
AS SATURDAY EVENING WITH SMALL CRAFT ADVISORY CONDITIONS LIKELY BY
EARLY SUNDAY AS WINDS AND SEAS INCREASE ACROSS LOCAL GULF AND
ATLANTIC WATERS.

MINOR COASTAL FLOODING IS POSSIBLE SATURDAY NIGHT THROUGH SUNDAY
NIGHT ALONG THE GULF COASTAL AREAS FROM MARCO ISLAND TO EVERGLADES
CITY AS WATER LEVEL REACH BETWEEN 1 AND 2 FEET ABOVE REGULAR HIGH
TIDE.

THE RISK OF RIP CURRENTS WILL INCREASE OVER THE WEEKEND ON BOTH THE
ATLANTIC AND GULF COAST BEACHES AHEAD OF A STRONG COLD FRONT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION: WIDESPREAD SPOTTER ACTIVATION IS NOT
ANTICIPATED, HOWEVER INDIVIDUAL SPOTTERS ARE ENCOURAGED TO REPORT
HIGH WIND 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

Special weather statement, Apr 20, 6:27 PM EDT, 3 hours 44 minutes before

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Special weather statement, Apr 20, 6:36 PM EDT, 3 hours 35 minutes before

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Special weather statement, Apr 20, 7:03 PM EDT, 3 hours 8 minutes before

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Special weather statement, Apr 20, 7:14 PM EDT, 2 hours 57 minutes before

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Special weather statement, Apr 20, 7:42 PM EDT, 2 hours 29 minutes before

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Special weather statement, Apr 20, 10:11 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 8:14 PM EDT	Special Marine Warning	MFL		61 min
Apr 20, 8:49 PM EDT	Areal Flood Advisory	MFL	Broward	72 min
Apr 21, 12:17 AM EDT	Areal Flood Advisory	MFL	Collier	118 min
Apr 21, 2:15 AM EDT	Areal Flood Advisory	MFL	Collier	2 hr
Apr 21, 4:09 AM EDT	Coastal Flood Watch	MFL	Collier	15 hr
Apr 21, 4:09 AM EDT	Rip Current Statement	MFL	Collier	64 hr
Apr 21, 4:44 AM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Apr 21, 4:45 AM EDT	Flood Watch	MFL	Broward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more	14 hr
Apr 21, 4:52 AM EDT	Small Craft Advisory	MFL		69 hr
Apr 21, 5:25 AM EDT	Special Weather Statement	MFL	Miami-Dade	35 min
Apr 21, 8:39 AM EDT	Special Marine Warning	MFL		66 min
Apr 21, 9:43 AM EDT	Special Marine Warning	MFL		47 min
Apr 21, 7:15 PM EDT	Coastal Flood Statement	MFL	Collier	21 hr

Nearby

Special Weather Statements in Florida, 2012 Every special weather statement in 2012

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.