Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Melbourne, FL

July 4, 2018Lake County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 4, 2018, 9:27 PM EDT for Lake County, Florida. It was in force for 48 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 4, 2018, 9:27 PM EDT (01:27 UTC)
Expired
Jul 4, 2018, 10:15 PM EDT
In force
48 min
Issued by
NWS Melbourne, FL

County Lake County, FL

The radar

The Tampa radar (KTBW), 113 km from the middle of the area, began a volume at 01:26 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 00:00Z, 1.5 hours before the alert went out and 124 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 00:00Z on 2018-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1278 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2018-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
1278 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1001 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
16 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 4, 4:25 PM EDT, 5 hours 2 minutes earlier.

Area forecast discussion, Jul 4, 4:25 PM EDT, 5 hours 2 minutes before
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Hazardous weather outlook, Jul 4, 5:31 AM EDT, 15 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Melbourne FL
531 AM EDT Wed Jul 4 2018

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-050000-
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-
531 AM EDT Wed Jul 4 2018

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
A weather disturbance passing overhead will generate scattered to
numerous lightning storms, especially over inland areas this
afternoon. A small threat for lightning will exist this morning in
Volusia and Brevard County as a few storms over the Atlantic push
onshore. A greater threat for storms is expected this afternoon
and early this evening mainly west of Interstate 95.

A few of today's storms could become strong with wind gusts of 40
to 50 mph, small hail, and frequent lightning the primary
threats. Also, torrential downpours of 1 to 2 inches in a short
60- to 90-minute period could lead to temporary road and drainage
flooding. Those with outdoor activities planned on this holiday,
whether on land or water, should remain weather aware. Seek
shelter at the first sight of threatening weather and remember:
when thunder roars, go indoors!

.MARINE THUNDERSTORM GUST IMPACT...
Scattered afternoon storms will be capable of producing wind
gusts in excess of 30 knots over inland lakes this afternoon.

.RIVER FLOOD IMPACT...
The Saint Johns River south of Lake Harney near Geneva remains
above Minor Flood Stage. Additional slight rises are expected to
continue, keeping the river within Minor Flood Stage into this
weekend. A River Flood Warning remains in effect for this area.

The Saint Johns River level near Sanford remains above Action
Stage. Additional slight rises are expected to continue, but
remain within Action Stage at this site through this weekend.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
Scattered to numerous afternoon and evening storms are expected
to continue into early next week. The main storm threats will be
frequent cloud to ground lightning strikes, urban, river and poor
drainage flooding from torrential downpours, and brief gusty
winds.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated today.

Ulrich

In the hours before

Local storm report, Jul 4, 5:36 PM EDT, 3 hours 51 minutes before
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Local storm report, Jul 4, 6:44 PM EDT, 2 hours 43 minutes before
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Local storm report, Jul 4, 9:15 PM EDT, 12 minutes before
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Special weather statement, Jul 4, 9:27 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 5, 11:22 AM EDTSpecial Weather StatementMLBMartin23 min
Jul 5, 11:25 AM EDTSpecial Marine WarningMLB35 min
Jul 5, 12:44 PM EDTSpecial Weather StatementMLBOrange31 min
Jul 5, 12:53 PM EDTSpecial Weather StatementMLBSaint Lucie37 min
Jul 5, 1:32 PM EDTSpecial Weather StatementMLBIndian River28 min
Jul 5, 2:02 PM EDTSpecial Weather StatementMLBOrange28 min
Jul 5, 2:10 PM EDTSpecial Weather StatementMLBVolusia35 min
Jul 5, 2:31 PM EDTSpecial Weather StatementMLBOsceola29 min
Jul 5, 3:06 PM EDTSpecial Weather StatementMLBVolusia39 min
Jul 5, 3:27 PM EDTSpecial Marine WarningMLB48 min
Jul 5, 3:31 PM EDTSpecial Weather StatementMLBIndian River29 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.