Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Melbourne, FL

June 29, 2018Volusia County, Florida

NWS Melbourne, FL issued this special weather statement at Jun 29, 2018, 4:07 PM EDT for Volusia County, Florida. It was in force for 23 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: Jun 29, 2018, 4:07 PM EDT (20:07 UTC)
Expired: Jun 29, 2018, 4:30 PM EDT
In force: 23 min
Issued by: NWS Melbourne, FL

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 139 km from the middle of the area, began a volume at 20:10 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, 8.1 hours before the alert went out and 111 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: 278 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 923 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -15 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 Jun 29, 3:40 PM EDT, 27 minutes earlier.

Area forecast discussion, Jun 29, 3:40 PM EDT, 27 minutes before

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Hazardous weather outlook, Jun 29, 11:13 AM EDT, 4 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Melbourne FL
1113 AM EDT Fri Jun 29 2018

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-300315-
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-
1113 AM EDT Fri Jun 29 2018

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
Deep moisture across central Florida will combine with high
temperatures in the 90s to allow numerous showers and
thunderstorms to develop through late afternoon. Scattered storms
along west coast sea breeze will advance into the east central
peninsula, while scattered storms develop along the I-95 Corridor
as the east coast sea breeze develops. Thunderstorm activity will
peak by late afternoon and early evening between the Florida
Turnpike and I-95 as the east and west coast sea breezes merge.

The main hazard will be frequent cloud-to-ground lightning
strikes and very heavy localized rainfall. Move inside if skies
begin to look threatening or if thunder is heard.

.FLOOD IMPACT...
Afternoon and evening thunderstorms will move to the east at 5 to
10 mph. The slow storm motion will enhance the threat of torrential
localized rainfall between 2 and 3 inches. Low lying and poor
drainage areas that receive this heavy rainfall may see periods of
minor flooding.

.MARINE THUNDERSTORM GUST IMPACT...
A few storms over the interior lakes and along the east coast
sea breeze will be capable of producing wind gusts around 40 mph.
Storm motion will be east to northeast at 5 to 10 mph, so
mariners on inland lakes and along the coast should move to safe
harbor if skies darken to the west.

.RIVER FLOOD IMPACT...
The Saint Johns River above Lake Harney near Geneva in the latest
forecast issued by the SERFC, is expected to reach minor flood
stage of 8 feet Sunday afternoon into early Monday morning and
remain at this height at least through Tuesday. As scattered to
numerous thunderstorms with heavy rain are expected each
afternoon, the levels could exceed the 8 feet level. River
forecasts will be adjusted accordingly.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
Scattered to numerous showers and thunderstorms are expected each
afternoon and evening. A few strong storms with frequent lightning
strikes and 2 to 3 inch downpours are expected where boundary
interactions are most vigorous.

.SPOTTER INFORMATION STATEMENT...
Spotters are requested to monitor the weather and self activate
if needed.

Bragaw

In the hours before

Special weather statement, Jun 29, 2:32 PM EDT, 1 hour 35 minutes before

Special Weather Statement
National Weather Service Melbourne FL
232 PM EDT FRI JUN 29 2018

FLZ045-047-147-291900-
Southern Brevard County FL-Northern Brevard County FL-Orange FL-
232 PM EDT FRI JUN 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR BREVARD AND SOUTHEASTERN ORANGE
COUNTIES UNTIL 300 PM EDT...

At 232 PM EDT, National Weather Service Meteorologists were tracking
a line of strong thunderstorms from west of Titusville south to west
of Palm Bay, moving east at 15 mph. The main threat with these
storms will be deadly cloud to ground lightning. If you are
outdoors, it is recommended you seek shelter inside a sturdy
building until these storms pass. Remember, you do not have to be
close to a storm to be struck by lightning.

Wind gusts up to 50 mph will also be possible with these storms.

Locations impacted include...
Palm Bay, Melbourne, Titusville, Rockledge and Cocoa.

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 2788 8087 2835 8086 2835 8098 2861 8099
      2862 8097 2879 8097 2880 8085 2880 8082
      2879 8079 2881 8080 2881 8069 2860 8054
      2846 8049 2839 8056 2830 8057 2813 8054
      2789 8044
TIME...MOT...LOC 1832Z 268DEG 15KT 2848 8084

Rodriguez

Local storm report, Jun 29, 3:06 PM EDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
National Weather Service Melbourne FL
306 PM EDT FRI JUN 29 2018

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

0300 PM     TSTM WND GST     4 NW HAULOVER CANAL     28.78N 80.80W
06/29/2018  M45 MPH          Brevard            FL   OTHER FEDERAL

            USAF TOWER KSC-421 MEASURED WIND GUST OF 39KT/45MPH FROM
            THE SOUTHWEST

&&

DKW

Special weather statement, Jun 29, 3:25 PM EDT, 42 minutes before

Special Weather Statement
National Weather Service Melbourne FL
325 PM EDT FRI JUN 29 2018

FLZ041-141-292000-
Coastal Volusia FL-Inland Volusia FL-
325 PM EDT FRI JUN 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL VOLUSIA COUNTY UNTIL 400
PM EDT...

At 323 PM EDT, Doppler radar was tracking a strong thunderstorm over
DeLand, and another strong thunderstorm over Lake Ashby, both moving
north-northeast at 15 mph. These storms are producing dangerous, and
very frequent lightning strikes. If outdoors, seek a sturdy shelter
immediately! Remember, you do not have to be near a storm to be
struck by lightning.

Wind gusts up to 50 mph will be also possible with this storm.

Locations impacted include...
Deltona, Daytona Beach, Port Orange, DeLand and New Smyrna Beach.

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 2883 8090 2879 8095 2879 8097 2876 8099
      2878 8106 2881 8107 2882 8109 2883 8112
      2881 8113 2889 8135 2891 8136 2895 8135
      2896 8137 2899 8136 2903 8140 2906 8146
      2909 8146 2910 8150 2919 8153 2925 8113
TIME...MOT...LOC 1923Z 246DEG 14KT 2903 8128

Rodriguez

Local storm report, Jun 29, 3:38 PM EDT, 29 minutes before

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Local storm report, Jun 29, 4:02 PM EDT, 5 minutes before

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Special weather statement, Jun 29, 4:07 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
Jun 29, 10:33 AM EDT	River Flood Warning	MLB	Seminole	38 days
Jun 29, 1:50 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Osceola, Seminole	40 min
Jun 29, 2:22 PM EDT	Special Marine Warning	MLB		113 min
Jun 29, 2:32 PM EDT	Special Weather Statement	MLB	Brevard	28 min
Jun 29, 3:25 PM EDT	Special Weather Statement	MLB	Volusia	35 min
Jun 29, 4:38 PM EDT	Special Weather Statement	MLB	Saint Lucie	37 min
Jun 29, 4:45 PM EDT	Areal Flood Advisory	MLB	Saint Lucie	90 min

Nearby

Special Weather Statements in Florida, 2018 Every 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.