Alert archive / Florida / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 68, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jul 31, 2019, 2:15 PM EDT for Okeechobee County, Florida. It was in force for 31 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 31, 2019, 2:15 PM EDT (18:15 UTC)
- Expired
- Jul 31, 2019, 2:46 PM EDT
- In force
- 31 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Okeechobee County, FL
The radar
The Melbourne radar (KMLB), 97 km from the middle of the area, began a volume at 18:14 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 6.3 hours before the alert went out and 139 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
- 2731 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
173
WUUS52 KMLB 311815
SVRMLB
FLC093-311900-
/O.NEW.KMLB.SV.W.0068.190731T1815Z-190731T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
215 PM EDT Wed Jul 31 2019
The National Weather Service in Melbourne has issued a
* Severe Thunderstorm Warning for...
South central Okeechobee County in east central Florida...
* Until 300 PM EDT.
* At 214 PM EDT, a severe thunderstorm was located near Okeechobee,
and is drifting northwest at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Okeechobee, Whispering Pines, Basswood Estates and Okeechobee
Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2720 8088 2728 8100 2730 8100 2730 8102
2731 8101 2739 8092 2728 8080
TIME...MOT...LOC 1814Z 107DEG 4KT 2728 8090
HAIL...1.00IN
WIND...60MPH
$$
Glitto2 follow-up statements
284
WWUS52 KMLB 311834
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
234 PM EDT Wed Jul 31 2019
FLC093-311900-
/O.CON.KMLB.SV.W.0068.000000T0000Z-190731T1900Z/
Okeechobee FL-
234 PM EDT Wed Jul 31 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTH CENTRAL OKEECHOBEE COUNTY...
At 233 PM EDT, a severe thunderstorm was located about 7 miles
southeast of Basinger, moving northwest at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Basswood Estates.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2722 8091 2728 8100 2730 8100 2730 8102
2731 8101 2739 8092 2728 8085
TIME...MOT...LOC 1833Z 142DEG 9KT 2732 8094
HAIL...1.00IN
WIND...60MPH
$$
Glitto687
WWUS52 KMLB 311846
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
246 PM EDT Wed Jul 31 2019
FLC093-311856-
/O.CAN.KMLB.SV.W.0068.000000T0000Z-190731T1900Z/
Okeechobee FL-
246 PM EDT Wed Jul 31 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL OKEECHOBEE
COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled. However gusty winds are still possible with this
thunderstorm.
LAT...LON 2722 8091 2728 8100 2730 8100 2730 8102
2731 8101 2739 8092 2728 8085
TIME...MOT...LOC 1845Z 107DEG 4KT 2732 8096
$$
GlittoWhat forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 31, 9:15 AM EDT, 5 hours earlier.
Area forecast discussion, Jul 31, 9:15 AM EDT, 5 hours before
East Central Florida Forecast Discussion National Weather Service Melbourne FL 915 AM EDT Wed Jul 31 2019 .DISCUSSION... Currently...Moisture has increased to around 2.0 inches on the morning sounding data from the cape. A very light wind profile remains in place making a challenge for specific rainfall coverage during the day. Using a forecast of numerous boundary interactions from mid to late afternoon, rainfall chances have been increased inland from the immediate coast on today's forecast. Today-Tonight...Good surface based heating will lead to the development of an east coast sea breeze boundary by mid day, and a late afternoon sea breeze collision is expected over the central peninsula. The lowest rain chances will be along the east coast and beaches (around 30 percent) and highest across the interior (40-50 percent). The main threat with storms will be dangerous cloud to ground lightning strikes and heavy downpours. A few storms may produce wind gusts up to 40 to 45 mph. By nightfall, most of the convection will be west of our area, though some showers and storms may be lingering from Lake County south along the Kissimmee River towards Lake Okeechobee. These storms are forecast to dissipate within an hour or two after sunset. Interestingly, about half of the high resolution models indicate convection may blow back east across parts of Orange and Osceola Counties and into Brevard late this evening. While the situation will not evolve exactly as currently depicted, we could see a few showers/storms push their way back into the area after sunset. Otherwise, skies will clear tonight with overnight lows settling into the mid to upper 70s. && .AVIATION... VFR conditions will prevail through mid day. Showers and thunderstorms will develop along the inland advancing sea breeze. The main impacts from storms will most likely be seen at MCO, SFB, LEE, and ISM between 18Z-22Z this afternoon, and vicinity storms at DAB and TIX possible from 17Z-20Z. Storms will be capable of producing IFR visibilities and MVFR ceiling conditions for short periods of time. The sea breeze will advance inland quickly from MLB to SUA, so those terminals should remain clear. && .MARINE... Today-Tonight...Light southeast winds this morning will become onshore at around 10 knots by this afternoon as the Atlantic high pressure builds over the area. Generally favorable boating conditions with seas 1-2 feet nearshore, and 2-3 feet offshore. Scattered showers and storms will be possible through the late morning before clearing out by early afternoon. && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && JP/PG
Hazardous weather outlook, Jul 31, 10:19 AM EDT, 3 hours 56 minutes before
Hazardous Weather Outlook National Weather Service Melbourne FL 1019 AM EDT Wed Jul 31 2019 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-312300- 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- Northern Lake-Orange-Seminole-Southern Brevard-Osceola- Indian River-Okeechobee-St. Lucie-Martin-Coastal Volusia- Southern Lake-Northern Brevard- 1019 AM EDT Wed Jul 31 2019 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. .THUNDERSTORM IMPACT... Scattered lightning storms will develop over the coastal counties as the east coast sea breeze develops. Storms will increase through the afternoon over the interior counties as the sea breeze pushes inland, and will continue into the early evening hours. Frequent lightning and heavy rain will be the primary hazards, but some storms will also be capable of wind gusts up to 45 mph over the interior counties as the east and west coast sea breezes merge. If threatening weather develops or if thunder is heard, cease outdoor activities and seek shelter in an enclosed building. .FLOOD IMPACT... Locally heavy downpours of 1 to 2 inches of rain in a short duration may accompany some storms today, especially inland where multiple boundaries interact. This could lead to ponding of water on roadways, parking lots, and other poorly drained and low-lying areas. .RIP CURRENT IMPACT... A 2 foot long period swell will combine with a high astronomical tide to generate a moderate rip current threat along the beaches of east central Florida. The threat will be highest from Noon through 5 PM this afternoon due to tidal effects. Always swim within site of a lifeguard, and never swim alone. .MARINE THUNDERSTORM GUST IMPACT... Storms will be capable of wind gusts over 35 knots mainly over large inland lakes today but also the Intracoastal Waterway and nearshore Atlantic waters early this afternoon. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. Scattered to numerous showers and lightning storms are expected each day with higher storm coverage over the interior. The main storm hazards will continue to be dangerous cloud to ground lightning strikes, strong wind gusts and local heavy rain. Rain chances will increase substantially across the entire area by this weekend and likely remain high through the start of next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected today and tonight. Pendergrast
In the hours before
Special weather statement, Jul 31, 2:06 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Melbourne FL
206 PM EDT Wed Jul 31 2019
FLZ058-311845-
Okeechobee FL-
206 PM EDT Wed Jul 31 2019
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN OKEECHOBEE COUNTY
UNTIL 245 PM EDT...
At 206 PM EDT, Doppler radar was tracking a strong thunderstorm near
Okeechobee. This storm was drifting toward the northwest at 5
mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Okeechobee, Basinger, Whispering Pines, Basswood Estates and
Okeechobee Airport.
LAT...LON 2717 8088 2716 8089 2717 8091 2719 8091
2720 8094 2722 8095 2722 8097 2723 8099
2725 8098 2726 8100 2730 8100 2730 8103
2732 8103 2741 8102 2732 8077 2721 8080
2719 8084 2715 8086
TIME...MOT...LOC 1806Z 103DEG 4KT 2726 8088
GlittoSpecial weather statement, Jul 31, 2:11 PM EDT, 4 minutes before
Special Weather Statement
National Weather Service Melbourne FL
211 PM EDT Wed Jul 31 2019
FLZ053-311900-
Osceola FL-
211 PM EDT Wed Jul 31 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN OSCEOLA COUNTY UNTIL
300 PM EDT...
At 211 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Holopaw, moving west at 5 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Holopaw, Harmony, Forever Florida and Deer Park.
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.
&&
LAT...LON 2828 8115 2816 8086 2809 8086 2808 8087
2798 8087 2799 8123
TIME...MOT...LOC 1811Z 107DEG 5KT 2809 8095
GlittoThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 2:06 PM EDT | Special Weather Statement | MLB | Okeechobee | 39 min |
| Jul 31, 2:11 PM EDT | Special Weather Statement | MLB | Osceola | 49 min |
| Jul 31, 2:58 PM EDT | Special Weather Statement | MLB | Seminole | 47 min |
| Jul 31, 3:02 PM EDT | Special Weather Statement | MLB | Osceola | 43 min |
| Jul 31, 3:35 PM EDT | Special Weather Statement | MLB | Orange | 25 min |
| Jul 31, 3:44 PM EDT | Special Weather Statement | MLB | Volusia | 46 min |
| Jul 31, 3:49 PM EDT | Special Weather Statement | MLB | Seminole | 41 min |
| Jul 31, 4:12 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 33 min |
| Jul 31, 4:38 PM EDT | Areal Flood Advisory | MLB | Lake, Volusia | 112 min |
| Jul 31, 4:55 PM EDT | Special Weather Statement | MLB | Lake | 65 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2019Every severe thunderstorm warning in 2019
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.