Alert archive / Florida / Special Weather Statements in 2017
Special Weather Statement, NWS Melbourne, FL
NWS Melbourne, FL issued this special weather statement at Jun 30, 2017, 4:17 PM EDT for Okeechobee County, Florida. It was in force for 43 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 30, 2017, 4:17 PM EDT (20:17 UTC)
- Expired
- Jun 30, 2017, 5:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Melbourne, FL
County Okeechobee County, FL
The radar
The Melbourne radar (KMLB), 72 km from the middle of the area, began a volume at 20:20 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 114 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
- 1757 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- -27 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 Jun 30, 3:55 PM EDT, 22 minutes earlier.
Area forecast discussion, Jun 30, 3:55 PM EDT, 22 minutes before
Area Forecast Discussion National Weather Service Melbourne FL 355 PM EDT Fri Jun 30 2017 .DISCUSSION... Through tonight...Late morning Cape sounding shows temps aloft have cooled a bit to -7C with precip water values of 1.9 inches. Early start to the convection has produced numerous boundary collisions already resulting in frequent lightning and heavy rains just inland from the east coast. The sounding also suggests the possibility of wet microbursts. Expect a collision over the north interior with the west coast breeze in a few hours near Lake county. There is a potential for storms or some debris rain to push back to the volusia coast this evening where steering flow is a little more steadily toward the E/NE. All activity should diminish by midnight. Saturday...High pressure ridge axis will be draped across central FL peninsula and adjacent Atlc and produce a light south to southwest flow turning onshore in a E/SE sea breeze near the coast. Atmosphere will remain quite moist with precip water values around 2 inches so expect the east coast sea breeze to become active with scattered showers/storms by early afternoon. Focus for storms will remain over the north interior during the late afternoon so will hold onto likely (60 percent) PoPs Orlando northward. Steering flow should bring some of the activity back to the coast from the Cape northward. Quicker inland penetration of the sea breeze along the Treasure coast of Martin and Saint Lucie will limit rain chances to 30 percent. High temperatures will reach the low to mid 90s over the interior and near 90 beaches with peak heat indices around 105. Sunday and Monday...Low-level high pressure ridge axis remaining just to our south will keep winds southerly during the late morning and early afternoon before the east coast sea breeze moves inland each afternoon. PWATs approaching 2 inches along with 500 mb temperatures between -7 and -8 Celsius will support showers and thunderstorms with the best chances again favoring the interior locations. The main storms threats will be frequent lightning strikes, localized very heavy rainfall, and gusty downburst winds. Max temps will remain in the low 90s inland and closer to 90 near the coast. Lows will be in the mid 70s with some lower 70s in some of the usual cooler spots. && .AVIATION...High coverage of storms expected over the interior terminals through 00Z, possibly pushing back toward DAB through 02Z. Then quiet overnight thru at least 14Z with convection bubbling up once again as the east coast sea breeze redevelops and sparks isolated to scattered SHRA/TSRA along or just inland from the coast, with higher coverage expected over the interior after 18Z. && .MARINE... Ridge axis north of area will settle southward over the waters through the weekend and into early next week. Light winds and minimal seas will prevail outside of daily convection. Winds generally S/SW over Volusia/Brevard waters except for afternoon sea breezes near shore. Farther south, winds mostly light SE. Seas 1-2 feet nearshore and 2-3 feet offshore. && .PRELIMINARY POINT TEMPS/POPS... DAB 75 91 74 90 / 30 50 30 50 MCO 75 93 75 93 / 30 60 30 60 MLB 76 90 75 89 / 20 40 20 40 VRB 75 89 74 90 / 20 40 20 40 LEE 76 92 76 93 / 40 60 30 60 SFB 75 93 76 93 / 30 60 30 60 ORL 76 93 76 93 / 30 60 30 60 FPR 75 90 73 90 / 20 30 20 40 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && SHORT TERM...Kelly IMPACT WEATHER/DSS....Ulrich AVIATION/MID TERM...Combs
Hazardous weather outlook, Jun 30, 1:00 PM EDT, 3 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Melbourne FL 100 PM EDT Fri Jun 30 2017 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-010000- 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- 100 PM EDT Fri Jun 30 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. .THUNDERSTORM IMPACT... Scattered lightning storms are expected through the remainder of the afternoon, with the highest concentration expected away from the coast. Storm motion will be slow and erratic. Cloud to ground lightning and heavy rainfall amounts between one and three inches in a 60 to 90 minute period will be the main storm threats. Brief gusty winds to 30 or 40 mph we also be possible. .MARINE THUNDERSTORM GUST IMPACT... Thunderstorms could produce wind gusts up to 35 knots over large inland lakes this afternoon. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. Scattered to locally numerous lightning storms are forecast to continue through this weekend as well as the Fourth of July holiday. Storm coverage will remain a little higher over the interior and northern counties. The primary threats will be dangerous lightning strikes and locally heavy rainfall, along with some brief gusty winds. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today. However, spotters are requested to report rainfall amounts of greater than 2 inches or any observed flooding. Cristaldi/Ulrich
In the hours before
Special weather statement, Jun 30, 4:17 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Melbourne FL
417 PM EDT FRI JUN 30 2017
FLZ058-302100-
Okeechobee FL-
417 PM EDT FRI JUN 30 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN OKEECHOBEE COUNTY
UNTIL 500 PM EDT...
At 416 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Fort Drum. This storm was nearly stationary.
Winds in excess of 40 mph will be possible with this storm.
This storm will remain over mainly rural areas of northeastern
Okeechobee County.
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 2759 8078 2756 8078 2756 8068 2726 8068
2726 8079
TIME...MOT...LOC 2016Z 210DEG 4KT 2746 8070
CombsThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:23 PM EDT | Special Weather Statement | MLB | Lake | 52 min |
| Jun 29, 8:39 PM EDT | Areal Flood Advisory | MLB | Lake | 96 min |
| Jun 30, 4:59 PM EDT | Special Weather Statement | MLB | Orange | 46 min |
| Jun 30, 5:21 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 28 min |
| Jun 30, 5:37 PM EDT | Special Weather Statement | MLB | Lake | 38 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.