Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Melbourne, FL

April 20, 2015Indian River County, Florida

NWS Melbourne, FL issued this special weather statement at Apr 20, 2015, 4:42 PM EDT for Indian River County, Florida. It was in force for 48 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: Apr 20, 2015, 4:42 PM EDT (20:42 UTC)
Expired: Apr 20, 2015, 5:30 PM EDT
In force: 48 min
Issued by: NWS Melbourne, FL

County Indian River County, FL

The radar

The Melbourne radar (KMLB), 26 km from the middle of the area, began a volume at 20:44 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.7 hours before the alert went out and 67 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: 841 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.2

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 Apr 20, 3:26 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Apr 20, 3:26 PM EDT, 1 hour 16 minutes before

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Hazardous weather outlook, Apr 20, 12:50 PM EDT, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MELBOURNE FL
1250 PM EDT MON APR 20 2015

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-210000-
FLAGLER BEACH TO VOLUSIA-BREVARD COUNTY LINE 0-20 NM-VOLUSIA-
BREVARD COUNTY LINE TO SEBASTIAN INLET 0-20 NM-
SEBASTIAN INLET TO JUPITER INLET 0-20 NM-FLAGLER BEACH TO VOLUSIA-
BREVARD COUNTY LINE 20-60 NM-VOLUSIA-
BREVARD COUNTY LINE TO SEBASTIAN INLET 20-60 NM-
SEBASTIAN INLET TO JUPITER INLET 20-60 NM-INLAND VOLUSIA COUNTY-
NORTHERN LAKE COUNTY-ORANGE-SEMINOLE-SOUTHERN BREVARD COUNTY-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-
COASTAL VOLUSIA COUNTY-SOUTHERN LAKE COUNTY-
NORTHERN BREVARD COUNTY-
1250 PM EDT MON APR 20 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

.THUNDERSTORM IMPACT...
A VERY MOIST ATMOSPHERE COMBINED WITH AN APPROACHING COLD
FRONT...TEAMED WITH COOLER TEMPERATURES IN THE MIDDLE LAYER OF
THE ATMOSPHERE AND A STRONG UPPER LEVEL JET PROVIDING LIFT...WILL
RESULT IN SCATTERED TO NUMEROUS LIGHTNING STORMS THAT WILL LAST
THROUGH SUNSET. SHOWERS AND STORMS ARE EXPECTED TO INCREASE IN
COVERAGE AS THEY WORK THEIR WAY EAST NORTHEAST AT 30 TO 40 MPH.
SOME STORMS ARE EXPECTED TO BECOME SEVERE PRODUCING FREQUENT
LIGHTNING STRIKES...DAMAGING WINDS NEAR 60 MPH...HAIL...AND
LOCALLY HEAVY RAIN.

.RIP CURRENT IMPACT...
LONG PERIOD OCEAN SWELLS WILL PRODUCE A LOW TO MODERATE RISK OF
RIP CURRENTS ESPECIALLY DURING THE AFTERNOON WHEN THE OUTGOING
TIDES ARE AT THEIR STRONGEST. LIFE GUARDS PERFORMED SEVERAL
RESCUES AT AREA BEACHES THIS PAST WEEKEND. ASK THE LIFE GUARDS
ABOUT SURF CONDITIONS AND SWIM NEAR THEM.

.MARINE THUNDERSTORM GUST IMPACT...
LIGHTNING STORMS WILL MOVE TOWARD THE EAST NORTHEAST AT 30 TO
35 KNOTS WHICH WILL BRING THEM ACROSS THE INTRACOASTAL AND NEAR
SHORE ATLANTIC WATERS IN THE LATE AFTERNOON AND EARLY EVENING.
SOME OF THE STORMS WILL CONTAIN STRONG WIND GUSTS OF 35 TO 45
KNOTS AND FREQUENT LIGHTNING. BOATERS ON INLAND LAKES...RIVERS AND
THE INTRACOASTAL AND NEARSHORE WATERS SHOULD KEEP AN EYE TO THE
WEST FOR RAPIDLY APPROACHING STORMS AND IMMEDIATELY SEEK SHELTER.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
LIGHTNING WILL BE THE MAIN HAZARD. A COOL FRONT WILL SETTLE
ACROSS SOUTH FLORIDA TUESDAY AND WEDNESDAY AS HIGHER PRESSURE
BUILDS IN FOR CENTRAL FLORIDA. RAIN CHANCES WILL BE NOTABLY LESS
BUT STILL REMAIN IN THE FORECAST GIVEN DAYTIME HEATING AND
RESIDUAL MOISTURE. SCATTERED SHOWERS AND STORMS WILL ALSO BE IN
THE FORECAST EACH DAY FOR LATE IN THE WEEK AND INTO THE WEEKEND.
THE NEXT FRONT MAY APPROACH OVER THE THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE
IF NEEDED.

KELLY/WIMMER

In the hours before

Local storm report, Apr 20, 3:29 PM EDT, 1 hour 13 minutes before

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Special weather statement, Apr 20, 3:32 PM EDT, 1 hour 10 minutes before

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Special weather statement, Apr 20, 3:34 PM EDT, 1 hour 8 minutes before

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Special weather statement, Apr 20, 3:42 PM EDT, 1 hour before

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Special weather statement, Apr 20, 3:59 PM EDT, 43 minutes before

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Special weather statement, Apr 20, 4:42 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 12:27 PM EDT	Special Weather Statement	MLB	Saint Lucie	48 min
Apr 20, 12:42 PM EDT	Special Weather Statement	MLB	Saint Lucie	63 min
Apr 20, 12:47 PM EDT	Special Marine Warning	MLB		58 min
Apr 20, 1:06 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee, Saint Lucie	39 min
Apr 20, 1:22 PM EDT	Special Marine Warning	MLB		83 min
Apr 20, 1:47 PM EDT	Special Weather Statement	MLB	Saint Lucie	58 min
Apr 20, 1:58 PM EDT	Special Weather Statement	MLB	Orange	62 min
Apr 20, 2:11 PM EDT	Areal Flood Advisory	MLB	Okeechobee	2 hr
Apr 20, 2:44 PM EDT	Special Marine Warning	MLB		91 min
Apr 20, 2:48 PM EDT	Special Marine Warning	MLB		57 min
Apr 20, 2:50 PM EDT	Special Weather Statement	MLB	Indian River, Martin, Okeechobee, Saint Lucie	55 min
Apr 20, 2:58 PM EDT	Special Weather Statement	MLB	Lake	62 min
Apr 20, 3:00 PM EDT	Special Weather Statement	MLB	Seminole	60 min
Apr 20, 3:06 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	39 min
Apr 20, 3:10 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole	41 min
Apr 20, 3:14 PM EDT	Special Weather Statement	MLB	Osceola	31 min
Apr 20, 3:32 PM EDT	Special Weather Statement	MLB	Orange	43 min
Apr 20, 3:34 PM EDT	Special Weather Statement	MLB	Lake	56 min
Apr 20, 3:42 PM EDT	Special Weather Statement	MLB	Okeechobee	33 min
Apr 20, 3:59 PM EDT	Special Weather Statement	MLB	Brevard	46 min
Apr 20, 4:17 PM EDT	Special Marine Warning	MLB		58 min

Nearby

Special Weather Statements in Florida, 2015 Every special weather statement in 2015

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.