Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Melbourne, FL

January 25, 2011Martin County, Florida

NWS Melbourne, FL issued this special weather statement at Jan 25, 2011, 9:31 PM EST for Martin County, Florida. It was in force for 44 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
Jan 25, 2011, 9:31 PM EST (02:31 UTC)
Expired
Jan 25, 2011, 10:15 PM EST
In force
44 min
Issued by
NWS Melbourne, FL

County Martin County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 02:31 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.

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 2.5 hours before the alert went out and 144 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 2011-01-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1046 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-01-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 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
1046 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
1.3
Supercell composite
8.2

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 Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Jan 25, 9:03 PM EST, 28 minutes earlier.

Area forecast discussion, Jan 25, 9:03 PM EST, 28 minutes before
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Hazardous weather outlook, Jan 25, 2:20 PM EST, 7 hours 11 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
220 PM EST TUE JAN 25 2011

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-252300-
COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE
OUT 20 NM-
COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN
INLET OUT 20 NM-
COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM-
WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO
60 NM OFFSHORE-
WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO
60 NM OFFSHORE-
WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE-
INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA-
SOUTHERN LAKE-NORTHERN BREVARD-
220 PM EST TUE JAN 25 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

...A TORNADO WATCH IS IN EFFECT FOR ALL OF EAST CENTRAL FLORIDA AND
THE ADJACENT NEAR SHORE WATERS THROUGH 900 PM EST...

.DAY ONE...THROUGH TONIGHT.

...THUNDERSTORM IMPACT...
A SQUALL LINE OVER THE EASTERN GULF OF MEXICO AT MID AFTERNOON WILL
ADVANCE QUICKLY EASTWARD INTO THIS EVENING. THE SQUALL LINE SHOULD
REACH NORTHERN INTERIOR SECTIONS OF EAST CENTRAL FLORIDA EARLY THIS
EVENING THEN PUSH THROUGH EAST CENTRAL FLORIDA THROUGH THE OVERNIGHT
HOURS. THE THREAT FOR DAMAGING WIND GUSTS WITH BOW ECHOS AND
ISOLATED TORNADOES CONTINUES WITH THIS SQUALL LINE. STORM MOTION
WILL BE RAPIDLY TOWARD THE NORTHEAST AT 50 MPH.

ADDITIONALLY...CONDITIONS ARE BECOMING INCREASINGLY FAVORABLE FOR
SCATTERED STORMS TO RAPIDLY DEVELOP AND STRENGTHEN OVER EAST CENTRAL
FLORIDA AHEAD OF THE SQUALL LINE THROUGH THE LATE AFTERNOON COMMUTE
HOURS. THESE STORMS WILL HAVE A MORE SIGNIFICANT THREAT FOR
SUPERCELLS AN ISOLATED LARGE LONG TRACK TORNADOES. AREAS NEAR THE
EAST COAST WILL HAVE ENHANCED LOW LEVEL CONVERGENCE AND SHEAR DUE TO
SOUTHEASTERLY SURFACE WINDS.

MAKE SURE YOU HAVE YOUR NOAA WEATHER RADIO IN GOOD WORKING ORDER...
WITH FRESH BATTERIES IN CASE OF A POWER FAILURE. HAVING A NOAA
WEATHER RADIO ALERT YOU OF AN APPROACHING TORNADO...ESPECIALLY IN
THE MIDDLE OF THE NIGHT...HAS SAVED LIVES.

...FLOOD IMPACT...
PERIODS OF VERY HEAVY RAINFALL MAY PRODUCE TEMPORARY FLOODING OF
LOW LYING AND POOR DRAINAGE AREAS BEGINNING LATE THIS AFTERNOON
BUT ESPECIALLY TONIGHT.

...HIGH WIND IMPACT...
STRONG AND GUSTY SOUTHEAST WINDS WILL CREATE ROUGH AND HAZARDOUS
BOATING CONDITIONS ON AREA LAKES AND THE INTRACOASTAL WATERS
DURING THE DAY. A LAKE WIND ADVISORY IS IN EFFECT FOR WINDS NEAR
20 MPH WITH GUSTS OF 30 TO 35 MPH.

...MARINE THUNDERSTORM GUST IMPACT...
A FEW STRONG STORMS CAPABLE OF PRODUCING STRONG WIND GUSTS OF 35
KNOTS OR GREATER MAY PUSH OFFSHORE LATE THIS AFTERNOON. LATER
TONIGHT...A SQUALL LINE IS EXPECTED TO PUSH OFFSHORE WITH A GREATER
THREAT FOR STRONG WIND GUSTS OF 35 TO 45 KNOTS...AND POSSIBLY
HIGHER. INDIVIDUAL STORM MOTION WILL BE TOWARD THE NORTHEAST AROUND
50 MPH.

...WATERSPOUT IMPACT...
MARINE SUPERCELL THUNDERSTORMS WITH TORNADIC WATERSPOUTS ARE
POSSIBLE THROUGH THIS EVENING AND OVERNIGHT...ESPECIALLY OVER THE
GULF STREAM.

...WIND AND SEA IMPACT...
A SMALL CRAFT ADVISORY IS IN EFFECT FOR SOUTHEAST WINDS AROUND 20
KNOTS TODAY...VEERING TO THE SOUTH AND SOUTHWEST TONIGHT WITH
OCCASIONAL GUSTS TO GALE FORCE OFFSHORE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
STRONG AND GUSTY WEST WINDS WILL PERSIST WEDNESDAY AND CONTINUE TO
PRODUCE HAZARDOUS BOATING CONDITIONS. ALTHOUGH IT WILL TURN COLDER
BEHIND THE FRONT...FREEZING TEMPERATURES ARE NOT EXPECTED AT
THIS TIME.

.SPOTTER INFORMATION STATEMENT...
FORMAL ACTIVATION IS LIKELY. THE NATIONAL WEATHER SERVICE MAY NEED
A PCARS RADIO OPERATOR.

KELLY/GLITTO

In the hours before

Special weather statement, Jan 25, 7:40 PM EST, 1 hour 51 minutes before
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Local storm report, Jan 25, 7:46 PM EST, 1 hour 45 minutes before
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Local storm report, Jan 25, 8:28 PM EST, 1 hour 3 minutes before
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Local storm report, Jan 25, 8:43 PM EST, 48 minutes before
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Local storm report, Jan 25, 9:08 PM EST, 23 minutes before
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Special weather statement, Jan 25, 9:31 PM EST, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jan 25, 7:04 PM ESTSpecial Weather StatementMLBOsceola41 min
Jan 25, 7:22 PM ESTTornado WarningMLBBrevard, Indian River, Osceola53 min
Jan 25, 7:40 PM ESTSpecial Weather StatementMLBIndian River, Okeechobee, Saint Lucie50 min
Jan 25, 8:04 PM ESTSevere Thunderstorm WarningMLBIndian River, Okeechobee, Saint Lucie56 min
Jan 25, 8:12 PM ESTTornado WarningMLBIndian River, Okeechobee, Saint Lucie63 min
Jan 25, 8:17 PM ESTSpecial Marine WarningMLB118 min
Jan 25, 8:36 PM ESTTornado WarningMLBMartin, Okeechobee, Saint Lucie54 min
Jan 26, 4:12 AM ESTLake Wind AdvisoryMLBLake, Orange, Osceola, Seminole, Volusia14 hr

Nearby

Special Weather Statements in Florida, 2011Every special weather statement in 2011

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.