Alert archive / Florida / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 82, NWS Miami, FL

August 13, 2004Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 13, 2004, 2:54 AM EDT for Glades County, Florida. It was in force for 21 min. 1 report 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, 2:54 AM EDT (06:54 UTC)
Expired: Aug 13, 2004, 3:15 AM EDT
In force: 21 min
Issued by: NWS Miami, FL
Area: Counties, with a storm outline in the text

County Glades County, FL

The radar

The Melbourne radar (KMLB), 102 km from the middle of the area, began a volume at 06:55 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

Time	Report	Where	Remark
Aug 13, 3:00 AM EDT	TSTM WND DMG	Buckhead Ridge, FL	NUMEROUS TREE LIMBS DOWN ACROSS STREETS

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 one storm report to this severe thunderstorm warning; the first came 6 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.

Issued	Product	Office	Lasted
Aug 12, 9:35 PM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 6.9 hours before the alert went out and 145 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: 3901 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 661 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KMFL 130654
SVRMIA
FLC043-130715-

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

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GLADES COUNTY IN SOUTH FLORIDA.

* UNTIL 315 AM EDT

* AT 254 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  STORM CAPABLE OF PRODUCING DAMAGING WINDS OVER NORTHEASTERN GLADES 
  COUNTY APPROACHING BUCKHEAD RIDGE...MOVING NORTH AT 25 MPH.

* THE STORM WILL AFFECT...
  BUCKHEAD RIDGE.

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 2699 8102 2702 8083 2765 8092 2759 8122

$$

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 13, 2:50 AM EDT, 4 minutes earlier.

Area forecast discussion, Aug 13, 2:50 AM EDT, 4 minutes before

SOUTH FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
250 AM EDT FRI AUG 13 2004

.DISCUSSION...HURRICANE CHARLEY IS MOVING TO THE NORTHEAST EARLY
THIS MORNING OVER THE NORTHWEST ATLANTIC WATERS. THE HURRICANE WILL
CONTINUE TO MOVE NORTHEAST TOWARDS THE CAROLINAS COAST TODAY...AS
THE STATIONARY FRONT REMAIN OVER THE NORTHERN GULF WATERS OF MEXICO
ACROSS NORTHERN FLORIDA.

THIS WILL KEEP SOUTH FLORIDA IN A SOUTHERLY FLOW TODAY...AND THERE
COULD STILL BE A FEW OUTER FEEDER BANDS THAT COULD EXTEND DOWN INTO
THE CWA AREA. BUT IF ANY OF THEM DEVELOP...THEY SHOULD BE OVER
MOSTLY THE NORTHERN PORTIONS OF THE CWA. SO PLAN ON HAVING THE
HIGHEST POPS OVER THE NORTHERN PORTIONS OF THE CWA DECREASING AS YOU
GO SOUTH THROUGH THE CWA.

THE STATIONARY FRONT WILL WEAKEN THROUGH SUNDAY...AS THE TROUGH OF
LOW PRESSURE OVER THE EASTERN US LIFTS OUT TO THE NORTHEAST. HIGH
PRESSURE WILL ALSO BUILD INTO CENTRAL FLORIDA THROUGH SUNDAY FROM
THE ATLANTIC WATERS...AND SHIFT THE STEERING FLOW FROM THE SOUTH TO
THE EAST. THIS WILL PUSH MOST OF THE SHOWERS AND THUNDERSTORMS
ACTIVITY TO THE INTERIOR AND WEST COAST ON SUNDAY.

.EXTENDED FORECAST...THE HIGH WILL REMAIN NEARLY STATIONARY THROUGH
EARLY NEXT WEEK...AS A WEAK TROPICAL WAVE OVER THE LESSER ANTILLES
ISLANDS MOVES NORTHWEST TOWARDS SOUTH FLORIDA. THE NORTHERN PORTION
OF THE WAVE COULD MOVE THROUGH SOUTH FLORIDA MONDAY NIGHT OR EARLY
TUESDAY. SO PLAN ON RAISING THE POPS A LITTLE ON TUESDAY TO ACCOUNT
THE INCREASE MOISTURE OVER SOUTH FLORIDA ON TUESDAY.

TROPICAL DEPRESSION #5 EAST OF THE LESSER ANTILLES IS FORECAST BY
THE NHC TO MOVE NORTHWEST TO AROUND THE JAMAICA ISLAND BY MIDDLE OF
NEXT WEEK. THEREFORE THE FORECAST IS VERY UNCERTAIN FOR LATE NEXT
WEEK DEPENDING ON THE TRACK AND STRENGTH OF DEPRESSION #5. AT THIS
TIME PLAN ONLY TO INCREASE THE MOISTURE A LITTLE OVER SOUTH FLORIDA
LATE NEXT WEEK TO SHOW THAT THE DEPRESSION #5 IS IN THE AREA OF
SOUTH FLORIDA.

&&

.MARINE...THE WINDS EARLY THIS MORNING OVER THE ATLANTIC WATERS WERE
BETWEEN 15 TO 20 KNOTS AND SHOULD SLOWLY DECREASE TO AROUND 10 TO 15
KNOTS BY AFTERNOON. OVER THE GULF AND LAKE WATERS...THE WINDS WERE
10 TO 15 KNOTS EARLY THIS MORNING. THESE WINDS SPEED SHOULD ALSO
SLOWLY DECREASE TO AROUND 10 KNOTS BY AFTERNOON. THE SEAS WILL ALSO
SLOWLY SUBSIDE FROM 2 TO 4 FEET DOWN TO 2 FEET BY AFTERNOON.
THEREFORE...PLAN ON DROPPING THE SCA FOR THE SOUTH FLORIDA
WATERS...AND PUT UP A SCEC FOR THE ATLANTIC WATERS ONLY FOR THIS
MORNING.

THE WINDS WILL THEN BE AROUND 10 KNOTS THROUGH MONDAY...AS THEY
SHIFT FROM A SOUTH DIRECTION TO A EAST DIRECTION. THE WINDS WILL
THEN INCREASE MONDAY NIGHT INTO TUESDAY AHEAD OF THE TROPICAL WAVE
TO 10 TO 15 KNOTS...AND INCREASE THE SEAS OVER THE ATLANTIC WATERS
TO 2 TO 4 FEET.

THE WINDS WILL THEN REMAIN AROUND 10 TO 15 KNOTS THROUGH REST OF THE
WEEK WITH SEAS 2 TO 4 FEET...AS TROPICAL DEPRESSION #5 GETS CLOSER
TO SOUTH FLORIDA.

&&

.FIRE WEATHER...NO CONCERNS WITH PLENTY OF MOISTURE AROUND.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH 92 78 91 78 / 50 30 30 20
FORT LAUDERDALE 90 80 89 81 / 40 20 20 20
MIAMI           91 79 90 80 / 30 20 30 20
NAPLES          90 75 91 74 / 50 30 40 30
&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.
GM...NONE.

&&

BAXTER

Hazardous weather outlook, Aug 13, 1:09 AM EDT, 1 hour 45 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, 1 hour 59 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

Local storm report, Aug 13, 2:42 AM EDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
242 AM EDT FRI AUG 13 2004

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

0129 AM     TSTM WND GST     MIAMI SHORES            25.86N 80.19W
08/13/2004  60 MPH           MIAMI-DADE         FL   NWS EMPLOYEE

            71ST STREET AND NE 7TH AVE

&&

TW

Local storm report, Aug 13, 2:44 AM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
244 AM EDT FRI AUG 13 2004

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

0150 AM     TSTM WND DMG     OAKLAND PARK            26.17N 80.14W
08/13/2004                   BROWARD            FL   NWS EMPLOYEE

            STEEL GAZEBO DESTROYED

&&

TW

Local storm report, Aug 13, 2:48 AM EDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
248 AM EDT FRI AUG 13 2004

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

0147 AM     TSTM WND DMG     MARCO ISLAND            25.94N 81.73W
08/13/2004                   COLLIER            FL   LAW ENFORCEMENT

            TELEPHONE POLES DOWN

&&

TW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 11:58 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	47 min
Aug 13, 1:27 AM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	63 min
Aug 13, 1:29 AM EDT	Severe Thunderstorm Warning	MFL	Collier	46 min
Aug 13, 8:44 AM EDT	Tornado Warning	MFL	Collier, Hendry	46 min
Aug 13, 10:54 AM EDT	Severe Thunderstorm Warning	MFL	Collier, Hendry	51 min
Aug 13, 10:56 AM EDT	Severe Thunderstorm Warning	MFL	Hendry	49 min
Aug 13, 11:06 AM EDT	Tornado Warning	MFL	Hendry	39 min
Aug 13, 11:41 AM EDT	Special Marine Warning	MFL		64 min
Aug 13, 11:45 AM EDT	Tornado Warning	MFL	Glades, Hendry	30 min
Aug 13, 12:17 PM EDT	Tornado Warning	MFL	Glades	43 min
Aug 13, 12:37 PM EDT	Flash Flood Warning	MFL	Glades, Hendry	3 hr
Aug 13, 3:05 PM EDT	Tornado Warning	MFL	Collier, Hendry	25 min

Nearby

Severe Thunderstorm Warnings in Florida, 2004 Every 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.