Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Melbourne, FL

July 22, 2018Brevard County, Indian River County, Osceola County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 22, 2018, 4:15 PM EDT for Brevard County, Indian River County, Osceola County, Florida. It was in force for 60 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 22, 2018, 4:15 PM EDT (20:15 UTC)
Expired
Jul 22, 2018, 5:15 PM EDT
In force
60 min
Issued by
NWS Melbourne, FL

Counties Brevard County, FL, Indian River County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 66 km from the middle of the area, began a volume at 20:19 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, 8.3 hours before the alert went out and 91 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 2018-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2275 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 2018-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
2275 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
24 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 Jul 22, 3:50 PM EDT, 25 minutes earlier.

Area forecast discussion, Jul 22, 3:50 PM EDT, 25 minutes before
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Hazardous weather outlook, Jul 22, 9:02 AM EDT, 7 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service Melbourne FL
902 AM EDT Sun Jul 22 2018

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-230100-
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-
902 AM EDT Sun Jul 22 2018

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
Scattered to numerous showers and lightning storms will move
quite quickly across the peninsula this afternoon and evening.
Some of these storms will be strong to severe and have the
potential to produce winds gust of 50 to 60 mph. Frequent
lightning and periods of torrential rainfall can also be expected
with the strongest storms. Strong to severe weather is possible
for all of east central Florida, but the greatest chances will be
north of a line from Kissimmee/St. Cloud to Melbourne/Palm Bay.
Storms will move fast from the west to northwest, so those with
outdoor activities should keep an eye on the western and northern
horizon and be prepared to move to safe shelter.

Timing for strong to severe weather will begin mid to late
afternoon across Lake and Volusia counties and late afternoon to
early evening across Seminole, Orange, Brevard, and Osceola
counties. The threat for strong to severe weather will continue
into the late evening and early overnight hours.

.EXCESSIVE HEAT IMPACT...
Heat indices between 100 and 105 degrees are expected where
showers and storms hold off the longest this afternoon. If
working outside or engaging in any outdoor activity, be sure to
remain well hydrated and take frequent rest breaks.

.RIP CURRENT IMPACT...
A small ocean swell will keep a moderate rip current risk at area
beaches. Only swim in the ocean near a lifeguard.

.MARINE THUNDERSTORM GUST IMPACT...
Storms will move to the east to southeast at 20 to 25 mph and
reach east central Florida and the coastal waters in the
afternoon into this evening. The latest indication is for the
greatest threat to be north of a line from Kissimmee/St. Cloud to
Melbourne/Palm Bay extending offshore into the Atlantic waters.
Wind gusts over 35 knots are expected over inland lakes and over
the coastal waters, which will prompt Special Marine Warnings for
portions of the coastal waters. Small craft operators should
navigate to safe harbor well in advance of approaching storms.

.RIVER FLOOD IMPACT...
The Saint Johns River above Lake Harney near Geneva remains at
Minor Flood Stage, and a River Flood Warning remains in effect
for this area. The Saint Johns River at Astor, Sanford and Deland
remain near or above Action Stage.

Barring additional significant rainfall over the basin or its
headwaters, river levels are forecast to either remain steady or
very slowly fall through early next week.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
Scattered to numerous afternoon and evening showers and storms
are expected this week. The main storm threats will continue to
be frequent lightning strikes, gusty winds and torrential
downpours producing urban, river, and poor drainage flooding.

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

Negron/Combs

In the hours before

Local storm report, Jul 22, 3:13 PM EDT, 1 hour 2 minutes before
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Local storm report, Jul 22, 3:15 PM EDT, 1 hour before
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Special weather statement, Jul 22, 3:30 PM EDT, 45 minutes before
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Local storm report, Jul 22, 3:38 PM EDT, 37 minutes before
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Local storm report, Jul 22, 4:06 PM EDT, 9 minutes before
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Special weather statement, Jul 22, 4:15 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 12:42 PM EDTSpecial Marine WarningMLB3 hr
Jul 22, 12:54 PM EDTSpecial Weather StatementMLBVolusia66 min
Jul 22, 1:03 PM EDTSevere Thunderstorm WarningMLBVolusia12 min
Jul 22, 1:18 PM EDTSevere Thunderstorm WarningMLBVolusia42 min
Jul 22, 2:01 PM EDTSpecial Marine WarningMLB3 hr
Jul 22, 2:05 PM EDTSpecial Weather StatementMLBLake, Seminole, Volusia85 min
Jul 22, 2:30 PM EDTAreal Flood AdvisoryMLBLake, Volusia2 hr
Jul 22, 2:39 PM EDTSpecial Weather StatementMLBBrevard, Orange, Seminole66 min
Jul 22, 2:46 PM EDTSevere Thunderstorm WarningMLBLake, Volusia44 min
Jul 22, 3:30 PM EDTSpecial Weather StatementMLBBrevard, Lake, Orange, Osceola, Seminole60 min
Jul 22, 4:23 PM EDTSpecial Marine WarningMLB3 hr
Jul 22, 5:11 PM EDTSpecial Weather StatementMLBIndian River, Martin, Okeechobee, Saint Lucie64 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.