Alert archive / Florida / Special Weather Statements in 2016

Special Weather Statement, NWS Melbourne, FL

July 18, 2016Orange County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 18, 2016, 1:55 PM EDT for Orange County, Florida. It was in force for 50 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
Jul 18, 2016, 1:55 PM EDT (17:55 UTC)
Expired
Jul 18, 2016, 2:45 PM EDT
In force
50 min
Issued by
NWS Melbourne, FL

County Orange County, FL

The radar

The Melbourne radar (KMLB), 89 km from the middle of the area, began a volume at 17:58 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, 5.9 hours before the alert went out and 101 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, Cape Canaveral, FL at 12:00Z on 2016-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2322 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, Cape Canaveral, FL at 12:00Z on 2016-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 square meters per square second.1939Sfc1 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
2322 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
-7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

963 
WWUS82 KMLB 181755
SPSMLB

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
155 PM EDT MON JUL 18 2016
 
FLZ045-053-181845-
OSCEOLA FL-ORANGE FL-
155 PM EDT MON JUL 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ORANGE AND
NORTHWESTERN OSCEOLA COUNTIES UNTIL 245 PM EDT...

AT 154 PM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 40 MPH OVER CELEBRATION
AND JUST WEST OF KISSIMMEE...MOVING WEST AT 20 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
KISSIMMEE...BAY LAKE...INTERCESSION CITY...
CELEBRATION AND FOUR CORNERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2844 8138 2825 8146 2824 8155 2826 8156
      2826 8166 2847 8166
TIME...MOT...LOC 1754Z 098DEG 17KT 2834 8150 

$$

ULRICH

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 Jul 18, 9:24 AM EDT, 4 hours 31 minutes earlier.

Area forecast discussion, Jul 18, 9:24 AM EDT, 4 hours 31 minutes before
East Central Florida Forecast Discussion
National Weather Service Melbourne FL
924 AM EDT MON JUL 18 2016

.DISCUSSION...
A deep layer onshore flow pattern will continue early this week with
lower than average precipitable water than one would expect in this
regime, especially over the next 24H. The main feature is an apchg
upper TUTT presently moving across the FL Straits toward ECFL. Mid
level drying evident on ltst WV imagery will overspread the forecast
area during the remainder of the day and this combined with a
rapidly onshore moving sea breeze boundary will largely eliminate
the coastal zones from measurable pcpn chcs. The current forecast is
in good shape, reserving the interior zones for iso-sct showers and
some thunderstorm potential from early through mid afternoon.
Isolated showers over the marine area will potentially move through
the hostile sea breeze circulation zone and bring a sprinkle or two
to locations mainly south of Cape Canaveral.

Little change in high temperatures is indicated with mid 90s inland
and around 90 at the coast.

&&

.Climate...Melbourne's low temperature this morning was only 83
degrees. If this holds through 1 AM tonight it will equal the all-
time warm minimum for any date.

&&

.AVIATION...Isolated Atlantic showers will cross the coast mainly S
of KCOF very brief and localized MVFR. Coverage is too low for any
tempo mention. The same goes for interior terminals where small
shower/storm chances exist mainly in the mid-late afternoon.

&&

.MARINE...
Today-Tonight...(prev disc) High pressure ridge axis to our north
will produce an easterly wind flow. Speeds look to be 5-10 knots
north and 10-15 knots south. Seas will be 2-3 feet and up to 4 feet
well offshore. Westward moving showers or storms will continue to
have a low coverage.

&&

.MLB Watches/Warnings/Advisories...
FL...None.
AM...None.

&&

JP/WU
Hazardous weather outlook, Jul 18, 4:00 AM EDT, 9 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
400 AM EDT MON JUL 18 2016

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-182000-
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-
400 AM EDT MON JUL 18 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
SLIGHT ATMOSPHERIC DRYING IS FORECAST TODAY BUT A SMALL CHANCE FOR
LIGHTNING STORMS EXISTS, MAINLY OVER INLAND AREAS.

.RIP CURRENT IMPACT...
AN EASTERLY WIND FLOW WAS PRODUCING A FRESH SWELL 2 TO 3 FEET IN
THE ATLANTIC. THIS WILL KEEP A MODERATE RIP CURRENT RISK AT AREA
BEACHES.

.MARINE THUNDERSTORM GUST IMPACT...
THERE IS A SMALL CHANCE FOR SHOWERS AND LIGHTNING STORMS ACROSS
THE ATLANTIC THIS MORNING, THEN OVER INLAND AREAS THIS AFTERNOON.
SHOWER AND STORM MOVEMENT WILL BE TO THE WEST AT 10 TO 15 KNOTS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
EASTERLY FLOW IS FORECAST THROUGH LATE WEEK, WHICH SHOULD BE
ACCOMPANIED BY OCCASIONAL BANDS OF HIGHER MOISTURE. THIS MAY
INCREASE THE COVERAGE OF SHOWERS AND LIGHTNING STORMS, ESPECIALLY
OVER THE INTERIOR.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

LASCODY

In the hours before

Special weather statement, Jul 18, 1:55 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
155 PM EDT MON JUL 18 2016

FLZ045-053-181845-
OSCEOLA FL-ORANGE FL-
155 PM EDT MON JUL 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ORANGE AND
NORTHWESTERN OSCEOLA COUNTIES UNTIL 245 PM EDT...

AT 154 PM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 40 MPH OVER CELEBRATION
AND JUST WEST OF KISSIMMEE...MOVING WEST AT 20 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
KISSIMMEE...BAY LAKE...INTERCESSION CITY...
CELEBRATION AND FOUR CORNERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2844 8138 2825 8146 2824 8155 2826 8156
      2826 8166 2847 8166
TIME...MOT...LOC 1754Z 098DEG 17KT 2834 8150

ULRICH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 4:33 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola27 min
Jul 18, 4:58 PM EDTSpecial Weather StatementMLBLake62 min

Nearby

Special Weather Statements in Florida, 2016Every 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.