Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 39, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Oct 28, 2021, 2:19 PM EDT for Lake County, Orange County, Seminole 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
- Oct 28, 2021, 2:19 PM EDT (18:19 UTC)
- Expired
- Oct 28, 2021, 3:00 PM EDT
- In force
- 41 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lake County, FL, Orange County, FL, Seminole County, FL
The radar
The Melbourne radar (KMLB), 111 km from the middle of the area, began a volume at 18:18 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 28, 9:00 AM EDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 6.3 hours before the alert went out and 102 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1603 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
449
WUUS52 KMLB 281819
SVRMLB
FLC069-095-117-281900-
/O.NEW.KMLB.SV.W.0039.211028T1819Z-211028T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
219 PM EDT Thu Oct 28 2021
The National Weather Service in Melbourne has issued a
* Severe Thunderstorm Warning for...
Western Seminole County in east central Florida...
Southern Lake County in east central Florida...
Northwestern Orange County in east central Florida...
* Until 300 PM EDT.
* At 218 PM EDT, a severe thunderstorm was located 9 miles south of
Groveland, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Orlando, Sanford, Apopka, Altamonte Springs and Ocoee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.
Tornadoes can develop quickly from severe thunderstorms. Although a
tornado is not immediately likely, if one is spotted, act quickly
and move to a place of safety inside a sturdy structure such as a
small interior room.
&&
LAT...LON 2848 8196 2904 8143 2902 8139 2898 8135
2897 8137 2894 8135 2889 8135 2889 8137
2887 8136 2886 8135 2885 8136 2883 8130
2867 8126 2835 8195
TIME...MOT...LOC 1818Z 231DEG 33KT 2843 8190
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Leahy2 follow-up statements
258
WWUS52 KMLB 281840
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
240 PM EDT Thu Oct 28 2021
FLC069-095-117-281900-
/O.CON.KMLB.SV.W.0039.000000T0000Z-211028T1900Z/
Seminole FL-Lake FL-Orange FL-
240 PM EDT Thu Oct 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR WESTERN SEMINOLE...CENTRAL LAKE AND NORTHWESTERN ORANGE
COUNTIES...
At 239 PM EDT, a severe thunderstorm was located over Clermont, or
near Ferndale, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Orlando, Sanford, Apopka, Altamonte Springs and Ocoee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
small central room in a sturdy structure.
&&
LAT...LON 2904 8143 2902 8139 2898 8135 2897 8137
2894 8135 2889 8135 2889 8137 2887 8136
2886 8135 2885 8136 2883 8130 2867 8126
2842 8180 2857 8188
TIME...MOT...LOC 1839Z 231DEG 33KT 2856 8172
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Leahy799
WWUS52 KMLB 281852
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
252 PM EDT Thu Oct 28 2021
FLC069-281902-
/O.CAN.KMLB.SV.W.0039.000000T0000Z-211028T1900Z/
Lake FL-
252 PM EDT Thu Oct 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LAKE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.
LAT...LON 2858 8165 2864 8166 2879 8149 2878 8142
2883 8142 2888 8136 2887 8136 2886 8135
2885 8136 2883 8130 2867 8126 2849 8166
2854 8166
TIME...MOT...LOC 1852Z 240DEG 30KT 2856 8161
$$
FLC095-117-281900-
/O.CON.KMLB.SV.W.0039.000000T0000Z-211028T1900Z/
Seminole FL-Orange FL-
252 PM EDT Thu Oct 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR WESTERN SEMINOLE AND NORTHWESTERN ORANGE COUNTIES...
At 252 PM EDT, a severe thunderstorm was located over Oakland, or
over Winter Garden, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Orlando, Sanford, Apopka, Altamonte Springs and Ocoee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
small central room in a sturdy structure.
&&
LAT...LON 2858 8165 2864 8166 2879 8149 2878 8142
2883 8142 2888 8136 2887 8136 2886 8135
2885 8136 2883 8130 2867 8126 2849 8166
2854 8166
TIME...MOT...LOC 1852Z 240DEG 30KT 2856 8161
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
LeahyThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 11:13 AM EDT | Special Weather Statement | MLB | Seminole | 47 min |
| Oct 28, 11:27 AM EDT | Special Marine Warning | MLB | 46 min | |
| Oct 28, 1:14 PM EDT | Special Weather Statement | MLB | Lake | 76 min |
| Oct 28, 1:38 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange | 52 min |
| Oct 28, 2:14 PM EDT | Special Weather Statement | MLB | Lake, Volusia | 61 min |
| Oct 28, 2:37 PM EDT | Special Marine Warning | MLB | 83 min | |
| Oct 28, 2:49 PM EDT | Special Marine Warning | MLB | 41 min | |
| Oct 28, 2:55 PM EDT | Special Weather Statement | MLB | Orange | 50 min |
| Oct 28, 3:13 PM EDT | Special Weather Statement | MLB | Volusia | 47 min |
| Oct 28, 3:29 PM EDT | Tornado Warning | MLB | Volusia | 16 min |
| Oct 28, 3:52 PM EDT | Special Weather Statement | MLB | Brevard, Osceola, Seminole | 53 min |
| Oct 28, 3:55 PM EDT | Special Marine Warning | MLB | 65 min | |
| Oct 28, 4:13 PM EDT | Special Marine Warning | MLB | 41 min | |
| Oct 28, 4:19 PM EDT | Special Weather Statement | MLB | Okeechobee | 41 min |
| Oct 28, 4:59 PM EDT | Tornado Warning | MLB | Indian River, Osceola | 31 min |
| Oct 28, 5:21 PM EDT | Tornado Warning | MLB | Brevard, Indian River | 24 min |
| Oct 28, 5:41 PM EDT | Special Marine Warning | MLB | 2 hr | |
| Oct 28, 5:43 PM EDT | Special Weather Statement | MLB | Indian River | 47 min |
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.