Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Melbourne, FL

May 27, 2018Okeechobee County, Florida

NWS Melbourne, FL issued this special weather statement at May 27, 2018, 2:02 PM EDT for Okeechobee County, Florida. It was in force for 58 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 27, 2018, 2:02 PM EDT (18:02 UTC)
Expired
May 27, 2018, 3:00 PM EDT
In force
58 min
Issued by
NWS Melbourne, FL

County Okeechobee County, FL

The radar

The Melbourne radar (KMLB), 90 km from the middle of the area, began a volume at 18:04 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, 6.0 hours before the alert went out and 132 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 2018-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 64 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 2018-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -85 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
64 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
713 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-85 m²/s²
0-3 km storm-relative helicity
-29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 27, 10:50 AM EDT, 3 hours 12 minutes earlier.

Area forecast discussion, May 27, 10:50 AM EDT, 3 hours 12 minutes before
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Hazardous weather outlook, May 27, 10:45 AM EDT, 3 hours 17 minutes before
Hazardous Weather Outlook
National Weather Service Melbourne FL
1045 AM EDT Sun May 27 2018

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-280000-
Flagler Beach to Jupiter Inlet out 60 nm-Volusia-Lake-Orange-
Seminole-Brevard-Osceola-Indian River-Okeechobee-St. Lucie-Martin-
1045 AM EDT Sun May 27 2018

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
Squalls containing heavy rain and gusty winds will move northward
across the region through the afternoon. Occasional lightning
strikes and wind gusts up to 50 mph will occur in the stronger
storms. A few storms may contain damaging wind gusts near 60 mph.
Wind shear will support rotating cells and potential for isolated
tornadoes into early this evening. The threat for severe weather
should decrease overnight.

.FLOOD IMPACT...
Conditions remain favorable for heavy rainfall and localized
flooding where any persistent rainbands can set up. Some locations
are experiencing saturated soil due to heavier rains since last
week. Anyone planning travel today should not try to drive through
water of unknown depth on roadways. A Flood Watch Continues through
Monday.

.HIGH WIND IMPACT...
Southeast winds near 20 mph will occasionally gust up to 35 mph away
from showers and storms. This will produce hazardous boating
conditions on the intracoastal waters and inland lakes. A Lake Wind
Advisory is in effect.

.RIP CURRENT IMPACT...
Strong winds and building surf will occur today as Alberto moves
northward over the eastern Gulf of Mexico. Rough surf and strong
currents will be present. Bathers are advised against entering the
water to any floating depth. Do not swim alone.

.MARINE THUNDERSTORM GUST IMPACT...
There is a high likelihood of wind gusts around 35 to 40 knots
over the Atlantic waters as numerous squalls move north across the
marine area as well as over larger lakes and bodies of water of
central Florida.

.WATERSPOUT IMPACT...
Sufficient low level wind shear will support waterspouts over the
adjacent Atlantic waters and large lakes of east central Florida.

.WIND AND SEA IMPACT...
Hazardous boating conditions occurring with southeast winds 20 to 30
knots with occasional gusts to gale force offshore. A Small Craft
Advisory is in effect areawide.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
Abundant tropical moisture will continue across the region and a
few periods of showers and lightning storms are expected through
at least Memorial Day.

The main hazard will be a possibility of widespread heavy rainfall,
causing flooding to become more of a concern. Dangerous lightning
strikes, gusty winds will be possible. Boating and beach conditions
will remain hazardous into Monday as well.

.SPOTTER INFORMATION STATEMENT...
Spotters should monitor the weather and self activate if necessary.
Please report rainfall amounts of 3 inches or greater to the National
Weather Service in Melbourne.

SK/JP

In the hours before

Local storm report, May 27, 8:05 AM EDT, 5 hours 57 minutes before
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Local storm report, May 27, 10:54 AM EDT, 3 hours 8 minutes before
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Special weather statement, May 27, 2:02 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Melbourne FL
202 PM EDT SUN MAY 27 2018

FLZ054-058-059-064-271900-
St. Lucie FL-Okeechobee FL-Martin FL-Indian River FL-
202 PM EDT SUN MAY 27 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN ST. LUCIE...OKEECHOBEE...
SOUTHWESTERN INDIAN RIVER AND WESTERN MARTIN COUNTIES UNTIL 300 PM
EDT...

At 202 PM EDT, Doppler radar was tracking a strong thunderstorm near
Basinger, moving north at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Treasure Island, Indiantown, Okeechobee, Fort Drum and Basinger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 2711 8066 2716 8071 2721 8081 2714 8087
      2722 8095 2722 8097 2730 8100 2733 8105
      2736 8103 2739 8112 2745 8115 2749 8120
      2755 8121 2758 8116 2765 8114 2764 8087
      2766 8087 2763 8054 2696 8045 2696 8061
TIME...MOT...LOC 1802Z 182DEG 32KT 2736 8099

Smith

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 2:46 AM EDTBeach Hazards StatementMLBVolusia18 hr
May 27, 5:25 AM EDTSpecial Weather StatementMLBBrevard, Indian River50 min
May 27, 5:31 AM EDTSpecial Marine WarningMLB59 min
May 27, 6:29 AM EDTSpecial Marine WarningMLB61 min
May 27, 7:08 AM EDTSpecial Marine WarningMLB52 min
May 27, 7:30 AM EDTSpecial Marine WarningMLB60 min
May 27, 8:02 AM EDTSpecial Marine WarningMLB58 min
May 27, 8:12 AM EDTLake Wind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia13 hr
May 27, 11:19 AM EDTSpecial Marine WarningMLB56 min
May 27, 2:42 PM EDTSpecial Weather StatementMLBBrevard, Indian River63 min
May 27, 2:48 PM EDTSpecial Marine WarningMLB87 min
May 27, 3:16 PM EDTSpecial Marine WarningMLB59 min
May 27, 3:18 PM EDTSpecial Weather StatementMLBMartin27 min
May 27, 3:40 PM EDTSpecial Marine WarningMLB50 min
May 27, 3:54 PM EDTSpecial Weather StatementMLBMartin36 min
May 27, 5:03 PM EDTSpecial Weather StatementMLBMartin57 min
May 27, 5:32 PM EDTSevere Thunderstorm WarningMLBMartin43 min
May 27, 5:58 PM EDTAreal Flood WarningMLBMartin, Saint Lucie3 hr
May 27, 6:01 PM EDTTornado WarningMLBOkeechobee29 min
May 27, 6:15 PM EDTSpecial Weather StatementMLBMartin30 min

Nearby

Special Weather Statements in Florida, 2018Every special weather statement in 2018

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.