Alert archive / Florida / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 6, NWS Miami, FL

February 24, 2010Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 24, 2010, 11:53 AM EST for Palm Beach County, Florida. It was in force for 24 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: Feb 24, 2010, 11:53 AM EST (16:53 UTC)
Expired: Feb 24, 2010, 12:17 PM EST
In force: 24 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 16:54 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 12:00Z, 4.9 hours before the alert went out and 93 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: 1030 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.8

Open this sounding in Storm Lab

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 Feb 24, 10:46 AM EST, 1 hour 7 minutes earlier.

Area forecast discussion, Feb 24, 10:46 AM EST, 1 hour 7 minutes before

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Hazardous weather outlook, Feb 24, 10:50 AM EST, 1 hour 3 minutes before

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
1050 AM EST WED FEB 24 2010

FLZ063-066>075-168-172>174-250030-
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-
1050 AM EST WED FEB 24 2010

...A FEW SEVERE STORMS POSSIBLE THROUGH EARLY EVENING...
...FREEZE WATCH GLADES/HENDRY/INLAND PALM BEACH/INLAND COLLIER FRI MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS: NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS ARE EXPECTED
TO DEVELOP TODAY AND LINGER AROUND INTO THE EARLY EVENING HOURS AS A
FRONT SWEEPS ACROSS SOUTH FLORIDA. GUSTY WINDS, HAIL, BRIEF PERIODS
OF HEAVY DOWNPOURS, AND OCCASIONAL LIGHTNING STRIKES ARE CONCERNS
WITH THE STORMS TODAY. A FEW STORMS COULD PRODUCE WIND GUSTS OF 55
TO 65 MPH. THE MAIN AREA LIKELY TO BE AFFECTED BY THE STRONGEST
ACTIVITY TODAY WILL BE AREAS ALONG AND SOUTH OF A LINE FROM WEST
PALM BEACH TO NAPLES.

WIND: THE STRONGEST STORMS TODAY COULD PRODUCE WIND GUSTS OF 55 TO
65 MPH. ALSO, WINDS WILL INCREASE ACROSS THE LOCAL WATERS BEHIND A
COLD FRONT TONIGHT, WITH SUSTAINED WINDS OF AROUND 25 KNOTS EXPECTED
ACROSS THE OFFSHORE GULF AND ATLANTIC WATERS.

HAIL: THE STRONGEST STORMS COULD PRODUCE HAIL TO AROUND 1 INCH IN
DIAMETER.

TORNADOES: THERE IS A REMOTE POSSIBILITY OF AN ISOLATED TORNADO OR
WATERSPOUT ACROSS MAINLAND SOUTH FLORIDA AND THE ADJACENT COASTAL
WATERS THROUGH THIS EVENING MAINLY ALONG AND SOUTH OF A LINE
EXTENDING FROM WEST PALM BEACH TO NAPLES.

FLOODING: THERE IS ALSO A SLIGHT RISK OF MINOR STREET FLOODING TODAY
DUE TO HEAVY DOWNPOURS FROM SHOWERS OR THUNDERSTORMS.

WAVES: SEAS WILL BUILD TO 7 FEET OR HIGHER ACROSS THE OFFSHORE
GULF AND ATLANTIC WATERS TONIGHT.

TEMPERATURES: MUCH COLDER AIR WILL PUSH INTO THE AREA TONIGHT WITH
LOWS EXPECTED TO FALL INTO THE LOWER TO MID 40S OVER THE INTERIOR
AND UPPER 40S TO LOWER 50S ELSEWHERE. WIND CHILL READINGS WILL BE
IN THE 30S INTERIOR TO THE 40S TO NEAR 50 ELSEWHERE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

COLD TEMPERATURES ARE EXPECTED THURSDAY NIGHT INTO FRIDAY MORNING.
LOWS WILL FALL INTO THE 30S OVER THE INTERIOR TO THE 40S ALONG THE
COASTS. FREEZING TEMPERATURES ARE POSSIBLE ACROSS GLADES, HENDRY,
INLAND PALM BEACH, AND INLAND COLLIER COUNTIES. A FREEZE WATCH IS
NOW IN EFFECT FOR THESE AREAS FRIDAY MORNING FOR THE POTENTIAL OF
A FREEZE.

POOR MARINE CONDITIONS ARE EXPECTED ON THURSDAY WITH RATHER STRONG
NORTHWEST WINDS AND HAZARDOUS SEAS IN THE GULF STREAM AND OFFSHORE
GULF WATERS.

THERE ARE INDICATIONS THAT LOW PRESSURE MAY DEVELOP OVER THE
GULF OF MEXICO ON MONDAY...TRACKING ACROSS NORTH OR CENTRAL
FLORIDA MONDAY NIGHT OR TUESDAY WHILE RAPIDLY STRENGTHENING.
SHOULD THIS OCCUR...SEVERE WEATHER WOULD BE A DISTINCT POSSIBILITY
ACROSS THE LOCAL AREA MONDAY NIGHT OR TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO REPORT ANY STRONG WINDS GUSTS, HAIL OR HIGH
RAINFALL AMOUNTS TO THE NATIONAL WEATHER SERVICE.

FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.

PS

In the hours before

Special weather statement, Feb 24, 10:47 AM EST, 1 hour 6 minutes before

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Local storm report, Feb 24, 10:50 AM EST, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1050 AM EST WED FEB 24 2010

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

1045 AM     HAIL             WEST PALM BEACH         26.71N 80.06W
02/24/2010  E0.50 INCH       PALM BEACH         FL   TRAINED SPOTTER

            DIME SIZE HAIL REPORTED AT OKEECHOBEE ROAD AND CONGRESS
            IN WEST PALM BEACH

&&

RLP

Local storm report, Feb 24, 11:00 AM EST, 53 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MIAMI FL
1100 AM EST WED FEB 24 2010

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

1045 AM     HAIL             WEST PALM BEACH         26.71N 80.06W
02/24/2010  M1.00 INCH       PALM BEACH         FL   TRAINED SPOTTER

            HAIL REPORTED AT OKEECHOBEE ROAD AND CONGRESS IN WEST
            PALM BEACH WAS MEASURED AND CORRECTED TO QUARTER SIZE
            HAIL.

&&

RLP

Special weather statement, Feb 24, 11:21 AM EST, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1121 AM EST WED FEB 24 2010

FLZ066-067-241700-
HENDRY FL-INLAND PALM BEACH COUNTY FL-
1121 AM EST WED FEB 24 2010

...STRONG THUNDERSTORMS MOVING EASTERN PORTIONS OF LAKE OKEECHOBEE AREA...

AT 1121 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF
CLEWISTON TO 3 MILES SOUTH OF OKEELANTA...MOVING NORTHEAST AT 35 MPH.

THESE STORMS WILL AFFECT...

HARLEM...
CLEWISTON...
BELLE GLADE...
PAHOKEE...
CANAL POINT...

AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 40 TO 45 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. SEEK SHELTER IN
A SAFE BUILDING UNTIL THE STORM PASSES.

RESIDENTS NEAR THE PATH OF THESE STORMS SHOULD REMAIN ON THE ALERT
FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

LAT...LON 2694 8031 2645 8069 2663 8103 2678 8094
      2671 8082 2671 8078 2669 8074 2672 8073
      2677 8075 2678 8072 2675 8071 2676 8070
      2681 8070 2687 8063 2696 8061 2696 8037
TIME...MOT...LOC 1621Z 214DEG 32KT 2666 8093 2655 8073

BAXTER

Local storm report, Feb 24, 11:26 AM EST, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1126 AM EST WED FEB 24 2010

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

1028 AM     TSTM WND DMG     2 SE WELLINGTON         26.64N 80.24W
02/24/2010                   PALM BEACH         FL   TRAINED SPOTTER

            FRONT DOOR BLOWN IN, DOWNED TREE BRANCHES AND FLIPPED
            VENDING MACHINE AT LAKE WORTH ROAD AND US 441, DIME SIZE
            HAIL ALSO REPORTED.

&&

RLP

Local storm report, Feb 24, 11:41 AM EST, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1141 AM EST WED FEB 24 2010

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

1024 AM     HAIL             3 SW GREENACRES CITY    26.61N 80.17W
02/24/2010  E1.00 INCH       PALM BEACH         FL   CO-OP OBSERVER

            1 INCH HAIL REPORTED BY COCORAHS OBSERVER 4.2 MILES NNW

            OF ABERDEEN, 0.58 INCHES OF RAIN IN LESS THAN 25 MINUTES.

&&

RLP

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 2:44 AM EST	Dense Fog Advisory	MFL	Broward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more	6 hr
Feb 24, 4:28 AM EST	Freeze Watch	MFL	Collier, Glades, Hendry, Palm Beach	24 hr
Feb 24, 4:50 AM EST	Fire Weather Watch	MFL	Broward, Miami-Dade, Palm Beach	11 hr
Feb 24, 6:38 AM EST	Special Weather Statement	MFL	Monroe	37 min
Feb 24, 9:06 AM EST	Small Craft Advisory	MFL		43 hr
Feb 24, 9:29 AM EST	Special Weather Statement	MFL	Broward	31 min
Feb 24, 9:36 AM EST	Special Weather Statement	MFL	Broward	24 min
Feb 24, 9:52 AM EST	Special Weather Statement	MFL	Palm Beach	23 min
Feb 24, 10:13 AM EST	Special Marine Warning	MFL		62 min
Feb 24, 10:19 AM EST	Severe Thunderstorm Warning	MFL	Palm Beach	26 min
Feb 24, 10:26 AM EST	Special Marine Warning	MFL		94 min
Feb 24, 10:46 AM EST	Severe Thunderstorm Warning	MFL	Palm Beach	18 min
Feb 24, 10:47 AM EST	Special Weather Statement	MFL	Hendry	43 min
Feb 24, 11:10 AM EST	Special Marine Warning	MFL		50 min
Feb 24, 11:20 AM EST	Special Marine Warning	MFL		55 min
Feb 24, 11:21 AM EST	Special Weather Statement	MFL	Palm Beach	39 min
Feb 24, 1:23 PM EST	Severe Thunderstorm Warning	MFL	Miami-Dade	22 min
Feb 24, 1:24 PM EST	Special Weather Statement	MFL	Glades	51 min
Feb 24, 1:50 PM EST	Special Weather Statement	MFL	Broward	40 min
Feb 24, 1:56 PM EST	Special Marine Warning	MFL		64 min
Feb 24, 2:19 PM EST	Special Weather Statement	MFL	Broward	26 min
Feb 24, 2:29 PM EST	Special Weather Statement	MFL	Palm Beach	46 min
Feb 24, 2:36 PM EST	Special Marine Warning	MFL		54 min
Feb 24, 2:36 PM EST	Severe Thunderstorm Warning	MFL	Glades	39 min
Feb 24, 3:04 PM EST	Special Weather Statement	MFL	Martin	26 min
Feb 24, 3:06 PM EST	Special Marine Warning	MFL		54 min
Feb 24, 3:20 PM EST	Special Weather Statement	MFL	Palm Beach	40 min
Feb 24, 4:07 PM EST	Red Flag Warning	MFL	Broward, Miami-Dade, Palm Beach	27 hr
Feb 24, 5:11 PM EST	Special Weather Statement	MFL	Martin	34 min
Feb 24, 5:20 PM EST	Special Weather Statement	MFL	Broward	40 min
Feb 24, 5:23 PM EST	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	21 min
Feb 24, 5:30 PM EST	Special Marine Warning	MFL		60 min
Feb 24, 5:31 PM EST	Special Weather Statement	MFL	Palm Beach	44 min

Nearby

Severe Thunderstorm Warnings in Florida, 2010 Every severe thunderstorm warning in 2010

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.