Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

April 22, 2012Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Apr 22, 2012, 5:26 AM EDT for Miami-Dade County, Florida. It was in force for 49 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 22, 2012, 5:26 AM EDT (09:26 UTC)
Expired: Apr 22, 2012, 6:15 AM EDT
In force: 49 min
Issued by: NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 20 km from the middle of the area, began a volume at 09:27 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

Tampa Bay, FL (KTBW), launched 00:00Z, 9.4 hours before the alert went out and 305 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: 12 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 22, 4:25 AM EDT, 1 hour 1 minute earlier.

Area forecast discussion, Apr 22, 4:25 AM EDT, 1 hour 1 minute before

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Hazardous weather outlook, Apr 21, 11:27 PM EDT, 5 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
1127 PM EDT SAT APR 21 2012

AMZ610-630-FLZ063-066>075-168-172>174-221100-
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-
1127 PM EDT SAT APR 21 2012

...TORNADO WATCH IN EFFECT FOR ALL OF SOUTH FL UNTIL 7 AM EDT SUNDAY...
...SMALL CRAFT ADVISORY IN EFFECT ALL LOCAL WATERS...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...OVERNIGHT

THUNDERSTORMS: A TORNADO WATCH IS IN EFFECT FOR ALL OF SOUTH FLORIDA
EFFECTIVE UNTIL 7 AM EDT SUNDAY. THE THUNDERSTORM RISK WILL INCREASE
OVERNIGHT. ISOLATED TORNADOES, DAMAGING WINDS UP TO 70 MPH, HAIL UP
TO QUARTER SIZE, AND FREQUENT LIGHTNING WILL BE POSSIBLE WITH THE
THUNDERSTORMS. ALL INTERESTS SHOULD REMAIN WEATHER ALERT OVERNIGHT.
TURN YOUR NOAA WEATHER RADIO ON SO THAT YOU RECEIVE WEATHER ALERTS
SHOULD A WARNING BE ISSUED FOR YOUR AREA, THEN YOU CAN TAKE PROTECTIVE
ACTION.

TORNADOES: ISOLATED TORNADOES ARE POSSIBLE OVERNIGHT. A TORNADO
WATCH IS IN EFFECT UNTIL 7 AM SUNDAY. STORMS WILL BE FAST MOVING,
AND TORNADOES ARE ESPECIALLY DANGEROUS AT NIGHT, SO STAY WEATHER
ALERT.

WATERSPOUTS: ISOLATED WATERSPOUTS ARE POSSIBLE ACROSS THE WATERS
THROUGHOUT THE NIGHT.

WIND: DAMAGING WIND GUSTS UP TO 70 MPH WILL BE POSSIBLE OVERNIGHT.

HAIL: HAIL UP TO QUARTER SIZE WILL BE POSSIBLE OVERNIGHT.

RIP CURRENTS: STRONG ONSHORE FLOW WILL RESULT IN A HIGH RISK OF
RIP CURRENTS AT THE GULF BEACHES. SOUTH SOUTHEASTERLY FLOW WILL
ALSO RESULT IN A MODERATE RISK OF RIP CURRENTS AT THE ATLANTIC
BEACHES THROUGH THIS EVENING.

FLOODING: THERE IS A LOW RISK FOR MINOR URBAN TYPE FLOODING TONIGHT
AS ANY SHOWERS OR THUNDERSTORMS WILL BE FAST MOVING.

WAVES: SEAS WILL BUILD TO 7 TO 8 FEET IN THE GULF STREAM AND OFFSHORE
GULF WATERS AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE EARLY SUNDAY MORNING
BEFORE CONDITIONS RAPIDLY IMPROVE.

HAZARDOUS MARINE CONDITIONS WILL CONTINUE SUNDAY THROUGH MONDAY
MORNING, ESPECIALLY ACROSS THE OFFSHORE GULF WATERS AND IN THE
GULF STREAM.

WATER LEVELS MAY REACH BETWEEN 1 AND 2 FEET ABOVE REGULAR HIGH TIDE
ALONG THE GULF COAST. HOWEVER, SIGNIFICANT FLOODING IS NOT EXPECTED.

A HIGH RISK OF RIP CURRENTS WILL CONTINUE THROUGH MONDAY MORNING
FOR THE GULF COAST BEACHES BEHIND A STRONG COLD FRONT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED OVERNIGHT THROUGH EARLY SUNDAY
MORNING. PLEASE REPORT ANY SEVERE WEATHER OR 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.

GREGORIA

In the hours before

Local storm report, Apr 22, 2:50 AM EDT, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
250 AM EDT SUN APR 22 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0240 AM     HEAVY RAIN       4 NNE GOLDEN GATE       26.23N 81.68W
04/22/2012  E1.50 INCH       COLLIER            FL   TRAINED SPOTTER

            A TRAINED SPOTTER REPORTED A RAINFALL ESTIMATE OF 1.50
            INCHES IN THE PAST 10-15 MINUTES...NEAR THE INTERSECTION
            OF IMMOKALEE ROAD AND GLADES BOULEVARD. SPOTTER ALSO
            ESTIMATED WIND GUSTS TO ABOUT 50 MPH AT THIS LOCATION.

&&

ROSS

Special weather statement, Apr 22, 3:43 AM EDT, 1 hour 43 minutes before

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Local storm report, Apr 22, 3:44 AM EDT, 1 hour 42 minutes before

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Special weather statement, Apr 22, 4:35 AM EDT, 51 minutes before

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Local storm report, Apr 22, 4:49 AM EDT, 37 minutes before

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Special weather statement, Apr 22, 5:26 AM 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 22, 12:16 AM EDT	Special Weather Statement	MFL	Broward	74 min
Apr 22, 1:22 AM EDT	Special Marine Warning	MFL		53 min
Apr 22, 1:47 AM EDT	Special Weather Statement	MFL	Collier, Glades, Hendry	58 min
Apr 22, 1:58 AM EDT	Severe Thunderstorm Warning	MFL	Glades	32 min
Apr 22, 2:12 AM EDT	Special Marine Warning	MFL		63 min
Apr 22, 2:18 AM EDT	Severe Thunderstorm Warning	MFL	Glades	42 min
Apr 22, 2:26 AM EDT	Special Marine Warning	MFL		64 min
Apr 22, 2:46 AM EDT	Special Weather Statement	MFL	Collier, Glades, Hendry	59 min
Apr 22, 2:57 AM EDT	Severe Thunderstorm Warning	MFL	Glades	33 min
Apr 22, 3:13 AM EDT	Special Marine Warning	MFL		62 min
Apr 22, 3:22 AM EDT	Special Marine Warning	MFL		38 min
Apr 22, 3:43 AM EDT	Special Weather Statement	MFL	Hendry	62 min
Apr 22, 4:35 AM EDT	Special Weather Statement	MFL	Broward, Miami-Dade, Palm Beach	55 min
Apr 22, 4:49 AM EDT	Wind Advisory	MFL	Broward, Collier, Miami-Dade, Monroe	12 hr
Apr 22, 5:02 AM EDT	Special Marine Warning	MFL		106 min
Apr 22, 12:00 PM EDT	Special Marine Warning	MFL		60 min
Apr 22, 12:41 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	35 min
Apr 22, 12:52 PM EDT	Special Marine Warning	MFL		83 min
Apr 22, 1:36 PM EDT	Special Marine Warning	MFL		54 min
Apr 22, 1:46 PM EDT	Special Marine Warning	MFL		44 min
Apr 22, 2:12 PM EDT	Special Marine Warning	MFL		63 min
Apr 22, 3:47 PM EDT	Special Marine Warning	MFL		31 min

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.