Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 35, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 21, 2021, 5:04 PM EDT for Brevard County, Orange County, Osceola 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
- Aug 21, 2021, 5:04 PM EDT (21:04 UTC)
- Expired
- Aug 21, 2021, 5:45 PM EDT
- In force
- 41 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Brevard County, FL, Orange County, FL, Osceola County, FL
The radar
The Melbourne radar (KMLB), 30 km from the middle of the area, began a volume at 21:04 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 38 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
- 708 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1198 m above ground
- 0-6 km bulk shear
- 6 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.
906
WUUS52 KMLB 212104
SVRMLB
FLC009-095-097-212145-
/O.NEW.KMLB.SV.W.0035.210821T2104Z-210821T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
504 PM EDT Sat Aug 21 2021
The National Weather Service in Melbourne has issued a
* Severe Thunderstorm Warning for...
West central Brevard County in east central Florida...
Southeastern Orange County in east central Florida...
Northeastern Osceola County in east central Florida...
* Until 545 PM EDT.
* At 504 PM EDT, a severe thunderstorm was located over Lone Cabbage
Fish Camp, or just south of Canaveral Groves, and is nearly
stationary.
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...
Rockledge, Cocoa, Lone Cabbage Fish Camp, Canaveral Groves and
Canaveral Acres.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2827 8072 2822 8086 2822 8101 2848 8100
2848 8080
TIME...MOT...LOC 2104Z 207DEG 1KT 2836 8085
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Rodriguez3 follow-up statements
995
WWUS52 KMLB 212114
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
514 PM EDT Sat Aug 21 2021
FLC009-095-097-212145-
/O.CON.KMLB.SV.W.0035.000000T0000Z-210821T2145Z/
Brevard FL-Orange FL-Osceola FL-
514 PM EDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL BREVARD...SOUTHEASTERN ORANGE AND NORTHEASTERN
OSCEOLA COUNTIES...
At 514 PM EDT, a severe thunderstorm was located over Canaveral
Groves, or over Lone Cabbage Fish Camp, and is nearly stationary.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Rockledge, Cocoa, Lone Cabbage Fish Camp, Canaveral Groves and
Canaveral Acres.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2829 8073 2823 8083 2822 8086 2822 8101
2848 8100 2848 8080
TIME...MOT...LOC 2114Z 210DEG 3KT 2839 8083
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Rodriguez151
WWUS52 KMLB 212123
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
523 PM EDT Sat Aug 21 2021
FLC095-097-212133-
/O.CAN.KMLB.SV.W.0035.000000T0000Z-210821T2145Z/
Orange FL-Osceola FL-
523 PM EDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ORANGE AND
NORTHEASTERN OSCEOLA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled for
Orange and Osceola Counties.
LAT...LON 2835 8086 2836 8087 2837 8087 2839 8089
2841 8088 2843 8090 2845 8089 2845 8090
2847 8089 2847 8088 2848 8087 2848 8080
2835 8075
TIME...MOT...LOC 2123Z 200DEG 2KT 2841 8082
$$
FLC009-212145-
/O.CON.KMLB.SV.W.0035.000000T0000Z-210821T2145Z/
Brevard FL-
523 PM EDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL BREVARD COUNTY...
At 523 PM EDT, a severe thunderstorm was located over Canaveral
Groves, and is nearly stationary.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Cocoa, Canaveral Groves and Canaveral Acres.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2835 8086 2836 8087 2837 8087 2839 8089
2841 8088 2843 8090 2845 8089 2845 8090
2847 8089 2847 8088 2848 8087 2848 8080
2835 8075
TIME...MOT...LOC 2123Z 200DEG 2KT 2841 8082
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Rodriguez373
WWUS52 KMLB 212136
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
536 PM EDT Sat Aug 21 2021
FLC009-212145-
/O.EXP.KMLB.SV.W.0035.000000T0000Z-210821T2145Z/
Brevard FL-
536 PM EDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BREVARD COUNTY
WILL EXPIRE AT 545 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Melbourne.
LAT...LON 2835 8086 2836 8087 2837 8087 2839 8089
2841 8088 2843 8090 2845 8089 2845 8090
2847 8089 2847 8088 2848 8087 2848 8080
2835 8075
TIME...MOT...LOC 2135Z 207DEG 1KT 2841 8082
$$
RodriguezThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 4:02 PM EDT | Special Weather Statement | MLB | Indian River | 28 min |
| Aug 21, 4:57 PM EDT | Special Weather Statement | MLB | Brevard | 33 min |
| Aug 21, 6:16 PM EDT | Special Weather Statement | MLB | Orange | 29 min |
| Aug 21, 6:35 PM EDT | Areal Flood Advisory | MLB | Orange | 2 hr |
Nearby
Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning in 2021
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.