Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 118, NWS Miami, FL

July 17, 2009Broward County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 17, 2009, 8:50 PM EDT for Broward County, Florida. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 17, 2009, 8:50 PM EDT (00:50 UTC)
Expired: Jul 17, 2009, 9:09 PM EDT
In force: 19 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Broward County, FL

The radar

The Miami radar (KAMX), 60 km from the middle of the area, began a volume at 00:50 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 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 Jul 17, 7:22 PM EDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jul 17, 7:22 PM EDT, 1 hour 28 minutes before

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Hazardous weather outlook, Jul 17, 10:12 AM EDT, 10 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA...UPDATED
NATIONAL WEATHER SERVICE MIAMI FL
1012 AM EDT FRI JUL 17 2009

FLZ063-066>075-168-172>174-180515-
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-
1012 AM EDT FRI JUL 17 2009

...SCATTERED THUNDERSTORMS DEVELOPING, FOCUSED INTERIOR/ATLANTIC COAST...
...ONE OR TWO STRONG STORMS POSSIBLE THIS AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS: SCATTERED MAINLY AFTERNOON THUNDERSTORMS ARE
EXPECTED ACROSS INTERIOR AND EAST COAST LOCATIONS, WITH ISOLATED
MAINLY LATE MORNING TO EARLY AFTERNOON THUNDERSTORMS POSSIBLE
ALONG THE IMMEDIATE GULF COAST. WESTERLY STEERING FLOW WILL ALLOW
STORMS TO DRIFT SLOWLY TO THE EAST AFTER THEY DEVELOP. THE
GREATEST THREATS FROM THE STORMS WILL BE DANGEROUS CLOUD TO GROUND
LIGHTNING STRIKES, AND HEAVY RAINFALL. A FEW STRONG STORMS WITH
GUSTY WINDS ARE POSSIBLE ACROSS PALM BEACH COUNTY.

WATERSPOUTS: LIGHT LOW LEVEL WINDS AND A MOIST ENVIRONMENT COULD
LEAD TO A FEW WATERSPOUTS DEVELOPING OVER THE LOCAL WATERS TODAY.

WIND: ONE OR TWO STORMS COULD BECOME STRONG WITH WIND GUSTS OF
40 TO 50 MPH THIS AFTERNOON. SHOULD STRONG STORMS MANAGE TO DEVELOP,
THE MOST LIKELY AREA OF DEVELOPMENT WOULD BE ACROSS PALM BEACH AND
BROWARD COUNTIES.

FLOODING: SLOW MOVING THUNDERSTORMS WILL DROP VERY HEAVY RAINFALL
IN A FEW LOCATIONS THIS AFTERNOON. THIS MAY LEAD TO MINOR URBAN
AND ROADWAY FLOODING AND MINOR FLOODING OF OTHER FLOOD PRONE
AREAS.

TEMPERATURES: HIGH TEMPERATURES THIS AFTERNOON WILL CLIMB INTO THE
MID 90S OVER THE INTERIOR AND ACROSS THE WESTERN SUBURBS OF THE PALM
BEACH, BROWARD, AND MIAMI-DADE METROPOLITAN AREAS. THESE TEMPS,
COMBINED WITH HIGH HUMIDITY, WILL MAKE IT FEEL AS THOUGH IT IS BETWEEN
100 AND 105 DEGREES THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS WILL CONTINUE
EACH DAY, WITH PERHAPS A SLIGHT INCREASE IN ACTIVITY EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

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

DG

In the hours before

Special weather statement, Jul 17, 3:37 PM EDT, 5 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
337 PM EDT FRI JUL 17 2009

FLZ067-172000-
INLAND PALM BEACH COUNTY FL-
337 PM EDT FRI JUL 17 2009

...STRONG THUNDERSTORM MOVING ACROSS CENTRAL PALM BEACH COUNTY...

AT 334 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF OKEELANTA...MOVING NORTHEAST AT
20 MPH. OTHER THUNDERSTORMS ALSO PERSIST ACROSS CENTRAL PALM BEACH
COUNTY MAINLY OVER THE LOXAHATCHEE WILDLIFE AREA.

THIS STORM WILL AFFECT...

BELLE GLADE...

AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS TO 50 MPH...PEA-SIZED
HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE POSSIBLE.
LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN FLORIDA. TREES
AND OPEN SHELTERS OFFER NO PROTECTION. WIND GUSTS OF UP TO 50 MPH CAN
DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED SMALL
OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM PASSES.

LAT...LON 2680 8036 2644 8031 2641 8067 2666 8083
TIME...MOT...LOC 1935Z 247DEG 19KT 2659 8064

KOB

Special weather statement, Jul 17, 4:50 PM EDT, 4 hours before

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Local storm report, Jul 17, 4:55 PM EDT, 3 hours 55 minutes before

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Special weather statement, Jul 17, 8:20 PM EDT, 30 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
Jul 17, 8:20 PM EDT	Special Weather Statement	MFL	Broward	25 min
Jul 17, 8:53 PM EDT	Special Marine Warning	MFL		52 min
Jul 18, 5:11 PM EDT	Special Weather Statement	MFL	Palm Beach	34 min
Jul 18, 5:45 PM EDT	Special Weather Statement	MFL	Palm Beach	30 min
Jul 18, 5:50 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	19 min
Jul 18, 6:20 PM EDT	Special Weather Statement	MFL	Palm Beach	40 min
Jul 18, 6:47 PM EDT	Special Marine Warning	MFL		58 min
Jul 18, 6:50 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	19 min
Jul 18, 7:15 PM EDT	Severe Thunderstorm Warning	MFL	Broward	39 min
Jul 18, 7:42 PM EDT	Special Marine Warning	MFL		93 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009 Every severe thunderstorm warning in 2009

Sources

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