Alert archive / Florida / Special Weather Statements in 2016

Special Weather Statement, NWS Melbourne, FL

May 20, 20164 counties in Florida

NWS Melbourne, FL issued this special weather statement at May 20, 2016, 3:44 PM EDT for 4 counties in Florida. It was in force for 61 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: May 20, 2016, 3:44 PM EDT (19:44 UTC)
Expired: May 20, 2016, 4:45 PM EDT
In force: 61 min
Issued by: NWS Melbourne, FL

Counties Indian River County, FL, Martin County, FL, Okeechobee County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 68 km from the middle of the area, began a volume at 19:47 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, 7.7 hours before the alert went out and 110 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: 499 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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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 May 20, 3:27 PM EDT, 17 minutes earlier.

Area forecast discussion, May 20, 3:27 PM EDT, 17 minutes before

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Hazardous weather outlook, May 20, 11:41 AM EDT, 4 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MELBOURNE FL
1141 AM EDT FRI MAY 20 2016

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-210045-
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-
1141 AM EDT FRI MAY 20 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

.THUNDERSTORM IMPACT...
AN APPROACHING OUTFLOW BOUNDARY AHEAD OF A WEAKENING BAND OF
SHOWERS AND STORMS WILL COMBINE WITH SEA BREEZE COLLISIONS AND A
PASSING DISTURBANCE ALOFT TO GENERATE SCATTERED TO NUMEROUS
LIGHTNING STORMS THIS AFTERNOON AND EVENING. STORMS WILL INITIALLY
DEVELOP ACROSS LAKE COUNTY AND THROUGH THE I-4 CORRIDOR IN THE
EARLY AFTERNOON...BECOMING NUMEROUS TOWARD LATE AFTERNOON AND THE
EARLY EVENING AS THEY TRACK EAST UP TO 15 TO 20 MPH AND INTERACT
WITH THE EAST COAST SEA BREEZE.

THE PRIMARY HAZARDS WILL BE STRONG TO ISOLATED SEVERE WIND GUSTS
UP TO 50 TO 60 MPH...FREQUENT CLOUD TO GROUND LIGHTNING STRIKES
AND LOCALLY HEAVY RAINFALL.

.FLOOD IMPACT...
THUNDERSTORMS DEVELOPING LATER THIS AFTERNOON WILL HAVE THE
POTENTIAL TO PRODUCE LOCALLY HEAVY RAINFALL AMOUNTS AROUND TWO TO
THREE INCHES WITH THE STRONGEST STORMS. SOME OF THE STORMS WILL
LIKELY AFFECT AREAS NEAR THE EAST COAST FROM VERO BEACH SOUTH
THAT HAVE ALREADY EXPERIENCED HEAVY RAIN OVER THE PAST FEW DAYS.
THIS WILL ELEVATE THE RISK FOR ADDITIONAL FLOODING IN LOW-LYING
AND POOR DRAINAGE AREAS ALONG THE TREASURE COAST.

.MARINE THUNDERSTORM GUST IMPACT...
SCATTERED STRONG THUNDERSTORMS MOVING EASTWARD UP TO 15 TO 20 MPH
WILL HAVE THE POTENTIAL TO PRODUCE WIND GUSTS IN EXCESS OF 35 MPH
OVER INLAND LAKES AND AS THEY MOVE OFFSHORE LATER IN THE
AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
ADEQUATE MOISTURE AHEAD OF A FRONTAL BOUNDARY WILL SUPPORT
SCATTERED TO NUMEROUS SHOWERS AND STORMS SATURDAY. SOME OF THE
STORMS MAY BECOME STRONG WITH GUSTY WINDS AND LOCALLY HEAVY
RAINFALL WITH THE POTENTIAL FOR MINOR FLOODING IN AREAS THAT HAVE
EXPERIENCED HEAVY RAIN OVER THE LAST SEVERAL DAYS. A FRONT WILL
MOVE THROUGH THE AREA LATE SUNDAY AND BRING DRY WEATHER EARLY NEXT
WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE
IF NEEDED. RAINFALL SPOTTERS SHOULD REPORT RAINFALL AMOUNTS OVER
TWO INCHES TO THE NATIONAL WEATHER SERVICE IN MELBOURNE.

WIMMER/WEITLICH

In the hours before

Local storm report, May 20, 1:48 PM EDT, 1 hour 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
148 PM EDT FRI MAY 20 2016

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

0131 PM     TSTM WND GST     ORLANDO EXECUTIVE AIRPO 28.55N 81.34W
05/20/2016  M46 MPH          ORANGE             FL   ASOS

&&

FRJ

Special weather statement, May 20, 1:55 PM EDT, 1 hour 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
155 PM EDT FRI MAY 20 2016

FLZ041-045>047-053-141-147-201845-
INLAND VOLUSIA COUNTY FL-NORTHERN BREVARD COUNTY FL-
SOUTHERN BREVARD COUNTY FL-OSCEOLA FL-ORANGE FL-
COASTAL VOLUSIA COUNTY FL-SEMINOLE FL-
155 PM EDT FRI MAY 20 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ORANGE...EASTERN
SEMINOLE...OSCEOLA...NORTHWESTERN BREVARD AND EASTERN VOLUSIA
COUNTIES UNTIL 245 PM EDT...

AT 152 PM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR HOLLY HILL TO NEAR
WEDGEFIELD TO NEAR POINCIANA...AND MOVING EAST AT 30 TO 35 MPH.

WIND GUSTS UP TO 40 TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS AND
WITH AN OUTFLOW BOUNDARY MOVING WELL AHEAD OF THIS LINE.

LOCATIONS IMPACTED INCLUDE...
DAYTONA BEACH...TITUSVILLE...SAINT CLOUD AND COCOA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE PRIMARY THREATS WILL BE CLOUD TO GROUND LIGHTNING AND STRONG WIND
GUSTS...WHICH CAN CAUSE UNSECURED OBJECTS TO BLOW AROUND...SNAP TREE
LIMBS...CAUSE POWER OUTAGES OR CAPSIZE SMALL BOATS. HEAVY RAINFALL
WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE
STORM PASSES.

BOATERS SHOULD BE AWARE THAT STRONG WIND GUSTS SOMETIMES OCCUR WELL
AWAY FROM THE HEAVY RAIN AND LIGHTNING ASSOCIATED WITH STORMS.

HEAVY RAINFALL IS ALSO OCCURRING WITH THESE STORMS...WHICH WILL
REDUCE VISIBILITY AND MAY LEAD TO TEMPORARY FLOODING OF LOW LYING AND
POOR DRAINAGE AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

IF ON OR NEAR LAKES IN THIS AREA...GET OUT OF THE WATER AND MOVE
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW.
DO NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

&&

LAT...LON 2943 8107 2909 8090 2877 8066 2845 8050
      2781 8100 2805 8146 2806 8146 2802 8139
      2802 8138 2808 8135 2809 8145 2814 8145
      2814 8148 2852 8128 2942 8114 2943 8110
TIME...MOT...LOC 1752Z 281DEG 32KT 2927 8095 2847 8112 2811 8149

WEITLICH

Special weather statement, May 20, 2:44 PM EDT, 1 hour before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
244 PM EDT FRI MAY 20 2016

FLZ045-047-053-054-147-201945-
NORTHERN BREVARD COUNTY FL-SOUTHERN BREVARD COUNTY FL-OSCEOLA FL-
ORANGE FL-INDIAN RIVER FL-
244 PM EDT FRI MAY 20 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ORANGE...INDIAN
RIVER...OSCEOLA AND BREVARD COUNTIES UNTIL 345 PM EDT...

AT 241 PM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES EAST OF CHRISTMAS
TO 14 MILES SOUTH OF LAKE KISSIMMEE...AND MOVING EAST AT 20 MPH.

OUTFLOW FROM THIS LINE OF STORMS WILL COLLIDE WITH THE EAST COAST
SEA BREEZE FROM BREVARD COUNTY SOUTHWARD OVER THE NEXT HOUR WITH
ADDITIONAL STRONG STORMS DEVELOPING OVER THE ADVISORY AREA.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
PALM BAY...MELBOURNE...ROCKLEDGE...SEBASTIAN AND COCOA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE PRIMARY THREATS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING AND
STRONG WIND GUSTS...WHICH CAN CAUSE UNSECURED OBJECTS TO BLOW
AROUND...SNAP TREE LIMBS...CAUSE POWER OUTAGES OR CAPSIZE SMALL
BOATS. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK
SHELTER INDOORS UNTIL THE STORM PASSES.

BOATERS SHOULD BE AWARE THAT STRONG WIND GUSTS SOMETIMES OCCUR WELL
AWAY FROM THE HEAVY RAIN AND LIGHTNING ASSOCIATED WITH STORMS.

HEAVY RAINFALL IS ALSO OCCURRING WITH THESE STORMS...WHICH WILL
REDUCE VISIBILITY AND MAY LEAD TO TEMPORARY FLOODING OF LOW LYING AND
POOR DRAINAGE AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 2756 8077 2764 8078 2764 8114 2765 8114
      2782 8121 2786 8130 2792 8131 2802 8143
      2804 8142 2801 8138 2808 8135 2809 8138
      2854 8105 2845 8050 2839 8056 2835 8057
      2814 8054 2754 8027
TIME...MOT...LOC 1841Z 254DEG 19KT 2854 8092 2771 8125

SEDLOCK

Local storm report, May 20, 3:17 PM EDT, 27 minutes before

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Local storm report, May 20, 3:27 PM EDT, 17 minutes before

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Special weather statement, May 20, 3:44 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
May 19, 10:40 PM EDT	Special Marine Warning	MLB		65 min
May 19, 10:41 PM EDT	Special Weather Statement	MLB	Indian River	49 min
May 20, 1:30 AM EDT	Areal Flood Advisory	MLB	Martin	2 hr
May 20, 12:01 PM EDT	Special Weather Statement	MLB	Lake	59 min
May 20, 12:56 PM EDT	Special Weather Statement	MLB	Lake, Orange, Seminole, Volusia	64 min
May 20, 1:09 PM EDT	Special Marine Warning	MLB		96 min
May 20, 1:55 PM EDT	Special Weather Statement	MLB	Brevard, Osceola, Seminole, Volusia	50 min
May 20, 2:03 PM EDT	Special Marine Warning	MLB		117 min
May 20, 2:15 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Volusia	30 min
May 20, 2:43 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	47 min
May 20, 2:44 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Osceola	61 min
May 20, 4:13 PM EDT	Special Marine Warning	MLB		2 hr
May 20, 4:42 PM EDT	Special Weather Statement	MLB	Indian River, Saint Lucie	63 min

Nearby

Special Weather Statements in Florida, 2016 Every special weather statement in 2016

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.