Alert archive / Florida / Special Weather Statements in 2017
Special Weather Statement, NWS Melbourne, FL
NWS Melbourne, FL issued this special weather statement at Jul 4, 2017, 5:04 PM EDT for Orange County, Florida. It was in force for 41 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, 2017, 5:04 PM EDT (21:04 UTC)
- Expired
- Jul 4, 2017, 5:45 PM EDT
- In force
- 41 min
- Issued by
- NWS Melbourne, FL
County Orange County, FL
The radar
The Melbourne radar (KMLB), 82 km from the middle of the area, began a volume at 21:07 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, 9.1 hours before the alert went out and 81 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.
- Mixed-layer CAPE
- 194 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1318 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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, 3:05 PM EDT, 1 hour 59 minutes earlier.
Area forecast discussion, Jul 4, 3:05 PM EDT, 1 hour 59 minutes before
Area Forecast Discussion National Weather Service Melbourne FL 305 PM EDT Tue Jul 4 2017 .DISCUSSION... Through tonight...a few cells forming as of mid afternoon. East coast sea breeze pushing inland and latest meso models continue to indicate some increase in coverage late afternoon through around sunset as the boundary reaches well inland and meets up with cells and outflows associated with west coast sea breeze as it pushes inland. Have PoPs in through sunset all areas and keep a mention in through early evening over the interior sections before activity diminishes or pushes west of east central FL. Also kept in a low PoP for the late night hours over the southern coastal sections where onshore flow and low level moisture may be sufficient to bring a few showers onshore. Wednesday...Low level ridge axis across the northern sections with E-SE flow. May be a few cells persisting in the morning over the southern sections. Position of ridge axis will allow earlier inland push of east coast sea breeze in the south, with highest coverage over the inland sections late afternoon. Have distributed highest PoPs there (40%), then gradually taper down to lowest values northern coastal sections (15-20%). High temps upper 80s-low 90s coast and low-mid 90s inland. Thu-Fri...High pressure in the mid-Atlantic will continue the ESE flow through the end of the week. Slightly lower PWAT values (1- 1.5") decreases available moisture, which lowers rain chances in the period. Best PoPs coverage Thursday is in the southern zones, along the Treasure Coast and Okeechobee County (30-40%). Friday, precip shifts inland, mainly north and west of I-4 (30-40%). Some remnant showers and storms may shift back to the coast through the afternoon. Highs in the low to mid 90s across the area with lows in the low to mid 70s. && .AVIATION...A lower coverage of SHRA/TSRA expected from mid to late afternoon, with scattered activity remaining confined to inland aerodromes (SFB- LEE-ISM-MCO). Confidence in SHRA/TSRA impacting these sites still too low to include TEMPOs at the 18Z package. Coastal sites (DAB to SUA) remain rain-free as sea breeze has already passed to their west and will continue to shift convection inland. && .MARINE...Tonight-Wednesday...Ridge axis near or just north of waters. Winds generally 10kt or less from E-SE and seas 1-2 ft near shore and up to 3 feet well offshore. Shower and storm chances over Atlantic mainly late night through morning hours. Thu-Fri...Chance of marine showers and thunderstorms mainly offshore of the Treasure Coast. Flow remains ESE at 10-15 kts and seas 2-3 feet. && .PRELIMINARY POINT TEMPS/POPS... DAB 76 89 75 90 / 10 20 10 20 MCO 75 92 75 93 / 20 30 10 20 MLB 76 88 77 89 / 10 20 10 20 VRB 76 89 75 89 / 10 30 10 30 LEE 76 93 76 94 / 20 30 20 20 SFB 75 92 75 93 / 10 30 10 20 ORL 75 92 75 93 / 20 30 10 20 FPR 76 88 75 89 / 20 30 10 30 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && Glitto/Smith/Ulrich
Hazardous weather outlook, Jul 4, 5:47 AM EDT, 11 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Melbourne FL 547 AM EDT Tue Jul 4 2017 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-042200- 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- 547 AM EDT Tue Jul 4 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. .THUNDERSTORM IMPACT... Scattered showers and lightning storms are expected to develop once again along sea and lake breezes, and thunderstorm outflow boundaries this afternoon and early this evening. Activity will be focused over the interior counties and west of interstate 95 along the Space and Treasure Coasts. The highest storm chances are expected from northern Osceola County northward across Orange Seminole, Lake and Volusia Counties, including greater Sanford, Orlando Kissimmee-Saint Cloud, Deland, Deltona and Daytona Beach. The main storm threats will be cloud to ground lightning and brief wind gusts in excess of 40 MPH. Storm motion will be slow and erratic, leading to rainfall totals between one and two inches in a 60 to 90 minute period. Move indoors if skies look threatening, or you hear thunder. .MARINE THUNDERSTORM GUST IMPACT... Thunderstorms could produce wind gusts up to 35 knots over large inland lakes this afternoon. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. Scattered afternoon and early evening showers and lightning storms are forecast throughout the week, with rain chances increasing toward the upcoming weekend as a weak frontal trough approaches north Florida. Until then, storm coverage will remain highest over the interior counties. The primary threats will be dangerous lightning strikes and locally heavy rainfall, along with some brief gusty winds. .SPOTTER INFORMATION STATEMENT... Skywarn spotter networks are requested to monitor the weather today and activate should any warnings be issued for their county. This will likely be confined to Lake, Seminole, Orange, Volusia and northern Osceola Counties today. Cristaldi
In the hours before
Special weather statement, Jul 4, 5:04 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Melbourne FL
504 PM EDT TUE JUL 4 2017
FLZ045-042145-
Orange FL-
504 PM EDT TUE JUL 4 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ORANGE COUNTY UNTIL
545 PM EDT...
At 504 PM EDT, Doppler radar was tracking a strong thunderstorm over
Orlando Executive Airport, or over Azalea Park. This storm was nearly
stationary.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Orlando, Winter Park, Maitland, Wedgefield and Bithlo.
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.
Excessive cloud to ground lightning is occurring with this storm.
Lightning can strike many miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle at the first sound of thunder.
&&
LAT...LON 2864 8146 2863 8133 2861 8132 2861 8109
2835 8111 2835 8151
TIME...MOT...LOC 2104Z 086DEG 1KT 2855 8133
BragawThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 5:11 PM EDT | Severe Thunderstorm Warning | MLB | Orange | 34 min |
| Jul 4, 5:28 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Seminole | 32 min |
| Jul 4, 5:58 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 32 min |
| Jul 4, 6:01 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 29 min |
| Jul 4, 6:38 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 19 min |
Nearby
Special Weather Statements in Florida, 2017Every special weather statement in 2017
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.