Alert archive / Florida / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 80, NWS Miami, FL

August 13, 2004Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 13, 2004, 1:27 AM EDT for Broward County, Miami-Dade County, Florida. It was in force for 63 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 13, 2004, 1:27 AM EDT (05:27 UTC)
Expired
Aug 13, 2004, 2:30 AM EDT
In force
63 min
Issued by
NWS Miami, FL
Area
Counties, with a storm outline in the text

Counties Broward County, FL, Miami-Dade County, FL

The radar

The Miami radar (KAMX), 43 km from the middle of the area, began a volume at 05:31 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.

What was reported inside it

TimeReportWhereRemark
Aug 13, 1:29 AM EDTTSTM WND GST 60Miami Shores, FL71ST STREET AND NE 7TH AVE
Aug 13, 1:50 AM EDTTSTM WND DMGOakland Park, FLSTEEL GAZEBO DESTROYED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 12, 9:35 PM EDTTornado WatchSPC10 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 5.5 hours before the alert went out and 17 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 00:00Z on 2004-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2493 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2004-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 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
2493 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
1169 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KMFL 130527
SVRMIA
FLC011-086-130630-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
127 AM EDT FRI AUG 13 2004

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BROWARD COUNTY IN SOUTH FLORIDA.
  NORTHEASTERN MIAMI-DADE COUNTY IN SOUTH FLORIDA.

* UNTIL 230 AM EDT

* AT 127 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  STORM CAPABLE OF PRODUCING DAMAGING WINDS OVER MIAMI               
  SHORES...MOVING NORTH AT 35 MPH.

* THE STORM WILL AFFECT...
  MIAMI SHORES.
  NORTH MIAMI.
  NORTH MIAMI BEACH.
  HALLANDALE BEACH.
  HOLLYWOOD.
  PORT EVERGLADES.

SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60
MPH...DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR 
HOME OR BUSINESS.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 2578 8029 2577 8009 2623 8012 2622 8032

$$

TW

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 12, 2:00 PM EDT, 11 hours 27 minutes earlier.

Area forecast discussion, Aug 12, 2:00 PM EDT, 11 hours 27 minutes before
SOUTH FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
200 PM EDT THU AUG 12 2004

.DISCUSSION...STILL WAITING FOR CHARLEY TO MAKE ITS IMPACT FELT
WHICH WILL GOVERN THE WEATHER THROUGH FRIDAY.  THE WAY IT LOOKS NOW
THE RAIN WILL START OVER THE WESTERN ZONES LATE TONIGHT AND OVER THE
EASTERN ZONES TOMORROW AFTERNOON.  SINCE THERE IS A LARGE AREA OF
DRIER AIR NORTH AND EAST OF THE STORM THE EXTREME EASTERN PORTION OF
THE ZONES WILL BE A PLACE WHERE THE RAIN CHANCE CAN BE LOWER THAN
WHAT WILL BE MENTIONED IN THE TEXT.  WE WILL STILL FEEL THE EFFECTS
OF CHARLEY ON SATURDAY IN THE FORM OF SOME FEEDER BAND THROUGH OUR
ZONES. SO WE ARE STILL LIKELY TO HAVE A HIGH PROBABILITY OF RAIN
ALTHOUGH NOT COMPLETELY CONFIDENT OF THE LOCATION.  AT PRESENT HAVE
PUT IT OVER THE NORTHERN ZONES.  BEGINNING NEXT WEEK WE SHOULD HAVE
THE SURFACE RIDGE BACK OVER THE AREA.  MORE IMPORTANT THE UPPER
RIDGE THAT HAS BEEN FORCING CHARLEY WEST SHOULD BE WELL IN PLACE
OVER OUR AREA AND WE SHOULD BE JUST A LITTLE BELOW CLIMATE ON THE
PROBABILITIES. AM DISREGARDING ANY POTENTIAL TROPICAL FEATURES
DURING THE EXTENDED PERIOD.
&&

.MARINE...BETWEEN BONNIE AND CHARLEY WE ARE UP TO SMALL CRAFT ON THE
ATLANTIC SIDE. WILL STAY IN THIS SITUATION UNTIL LATE FRIDAY NIGHT
AND THEN SEE A DECREASE TO EXERCISE CAUTION SATURDAY. BY SATURDAY
NIGHT AND THEN THROUGH THE THE REST OF THE FORECAST WE SHOULD BE 15
KNOTS OR LESS.
&&

.FIRE WEATHER...EVEN THOUGH WINDS AND DSI WILL REMAIN HIGH HUMIDITY
VALUES WILL REMAIN ABOVE THE 35 PERCENT THRESHOLD SO NO NEED FOR ANY
ADVISORIES.
&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH 81 90 80 90 / 50 70 50 30
FORT LAUDERDALE 82 90 79 90 / 50 70 50 30
MIAMI           80 90 79 90 / 50 70 50 30
NAPLES          76 90 76 88 / 70 100 70 30
&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...HURRICANE WARNING FOR W COLLIER AND MAINLAND MONROE COUNTIES.
     FLOOD WATCH ALL ZONES THROUGH FRIDAY.
     INLAND TROPICAL STORM WIND WATCH GLADES AND HENDRY.
     TROPICAL STORM WATCH LAKE OKEECHOBEE.
AM...SMALL CRAFT ADVISORY ATLC WATERS.
GM...HURRICANE WARNING FOR GULF WATERS.

&&
Hazardous weather outlook, Aug 13, 1:09 AM EDT, 18 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MIAMI FL
109 AM EDT FRI AUG 13 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA

FLZ063-066>075-131500-
BROWARD METROPOLITAN-DADE METROPOLITAN-EASTERN COLLIER-GLADES-HENDRY-
MAINLAND MONROE-PALM BEACH EASTERN-PALM BEACH WESTERN-
WESTERN BROWARD-WESTERN COLLIER-WESTERN DADE-
109 AM EDT FRI AUG 13 2004

.DAY ONE...TODAY

...HURRICANE CHARLEY AFFECTING SOUTH FLORIDA TODAY...

HURRICANE CHARLEY WILL MOVE NORTH OVER THE EASTERN GULF OF MEXICO
TODAY, MAKING LANDFALL ALONG THE WEST FLORIDA COAST. REFER TO THE
LATEST HURRICANE LOCAL STATEMENT FOR DETAILS ON THIS WEATHER
SITUATION.

ADDITIONAL INFORMATION CAN BE FOUND ON THE NATIONAL WEATHER SERVICE
WEB SITE AT MIAMIWEATHER.INFO. IN SPANISH, VISIT OUR WEB SITE AT
ELTIEMPOENMIAMI.INFO.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

REPORTS OF ANY DAMAGING WINDS, FLOODING, AND TORNADOES WILL BE NEEDED
TODAY.

HANDEL

In the hours before

Local storm report, Aug 13, 12:55 AM EDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1255 AM EDT FRI AUG 13 2004

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

1225 AM     TSTM WND DMG     CUTLER RIDGE            25.60N 80.36W
08/13/2004                   MIAMI-DADE         FL   AMATEUR RADIO

            CARPORT BLEW AWAY AT SW 120TH AVE AND 210TH TERRACE. WIND
            GUST ESTIMATED BY TRAINED SPOTTER AT 50 MPH OR MORE.

&&

TW

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 11:58 PM EDTSevere Thunderstorm WarningMFLMiami-Dade47 min
Aug 13, 1:29 AM EDTSevere Thunderstorm WarningMFLCollier46 min
Aug 13, 2:54 AM EDTSevere Thunderstorm WarningMFLGlades21 min
Aug 13, 8:44 AM EDTTornado WarningMFLCollier, Hendry46 min
Aug 13, 10:54 AM EDTSevere Thunderstorm WarningMFLCollier, Hendry51 min
Aug 13, 10:56 AM EDTSevere Thunderstorm WarningMFLHendry49 min
Aug 13, 11:06 AM EDTTornado WarningMFLHendry39 min
Aug 13, 11:41 AM EDTSpecial Marine WarningMFL64 min
Aug 13, 11:45 AM EDTTornado WarningMFLGlades, Hendry30 min
Aug 13, 12:17 PM EDTTornado WarningMFLGlades43 min
Aug 13, 12:37 PM EDTFlash Flood WarningMFLGlades, Hendry3 hr
Aug 13, 3:05 PM EDTTornado WarningMFLCollier, Hendry25 min

Nearby

Severe Thunderstorm Warnings in Florida, 2004Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.