Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 13, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 25, 2021, 9:44 AM EDT for Brevard County, Seminole County, Volusia County, Florida. It was in force for 46 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
- Apr 25, 2021, 9:44 AM EDT (13:44 UTC)
- Expired
- Apr 25, 2021, 10:30 AM EDT
- In force
- 46 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Brevard County, FL, Seminole County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 70 km from the middle of the area, began a volume at 13:43 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, 1.7 hours before the alert went out and 43 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
- 1032 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.3
The text
As transmitted.
006
WUUS52 KMLB 251344
SVRMLB
FLC009-117-127-251430-
/O.NEW.KMLB.SV.W.0013.210425T1344Z-210425T1430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
944 AM EDT Sun Apr 25 2021
The National Weather Service in Melbourne has issued a
* Severe Thunderstorm Warning for...
Northeastern Seminole County in east central Florida...
Northwestern Brevard County in east central Florida...
Southeastern Volusia County in east central Florida...
* Until 1030 AM EDT.
* At 943 AM EDT, a severe thunderstorm was located near Osteen, or
near Geneva, moving east at 25 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...
Deltona, Sanford, Oak Hill, Mims and Geneva.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2860 8057 2874 8127 2890 8122 2887 8074
2866 8059
TIME...MOT...LOC 1343Z 280DEG 22KT 2881 8110
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
Combs3 follow-up statements
216
WWUS52 KMLB 251356
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
956 AM EDT Sun Apr 25 2021
FLC009-117-127-251430-
/O.CON.KMLB.SV.W.0013.000000T0000Z-210425T1430Z/
Seminole FL-Brevard FL-Volusia FL-
956 AM EDT Sun Apr 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT
FOR EAST CENTRAL SEMINOLE...NORTHWESTERN BREVARD AND SOUTHEASTERN
VOLUSIA COUNTIES...
At 956 AM EDT, a severe thunderstorm was located near Maytown, or
near Geneva, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Oak Hill, Mims, Geneva, Playalinda Beach and Scottsmoor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 2868 8098 2874 8112 2888 8106 2886 8073
2865 8059 2860 8058
TIME...MOT...LOC 1356Z 284DEG 25KT 2878 8104
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
Combs324
WWUS52 KMLB 251415
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
1015 AM EDT Sun Apr 25 2021
FLC117-127-251425-
/O.CAN.KMLB.SV.W.0013.000000T0000Z-210425T1430Z/
Seminole FL-Volusia FL-
1015 AM EDT Sun Apr 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SEMINOLE AND
SOUTHEASTERN VOLUSIA COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 2872 8095 2879 8095 2880 8075 2879 8074
2880 8074 2880 8069 2865 8059 2864 8059
TIME...MOT...LOC 1415Z 283DEG 29KT 2874 8087
$$
FLC009-251430-
/O.CON.KMLB.SV.W.0013.000000T0000Z-210425T1430Z/
Brevard FL-
1015 AM EDT Sun Apr 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT
FOR NORTHWESTERN BREVARD COUNTY...
At 1015 AM EDT, a severe thunderstorm was located over Scottsmoor,
moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Haulover Canal, Playalinda Beach, Scottsmoor, Mims and Klondike
Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2872 8095 2879 8095 2880 8075 2879 8074
2880 8074 2880 8069 2865 8059 2864 8059
TIME...MOT...LOC 1415Z 283DEG 29KT 2874 8087
HAIL...1.00IN
WIND...60MPH
$$
Combs339
WWUS52 KMLB 251426
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
1026 AM EDT Sun Apr 25 2021
FLC009-251435-
/O.EXP.KMLB.SV.W.0013.000000T0000Z-210425T1430Z/
Brevard FL-
1026 AM EDT Sun Apr 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BREVARD COUNTY
WILL EXPIRE AT 1030 AM 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.
LAT...LON 2872 8095 2879 8095 2880 8075 2879 8074
2880 8074 2880 8069 2865 8059 2864 8059
TIME...MOT...LOC 1425Z 275DEG 25KT 2874 8078
$$
CombsThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 6:52 AM EDT | Special Marine Warning | MLB | 53 min | |
| Apr 25, 6:56 AM EDT | Special Weather Statement | MLB | Flagler | 34 min |
| Apr 25, 7:31 AM EDT | Special Weather Statement | MLB | Lake | 59 min |
| Apr 25, 8:30 AM EDT | Special Weather Statement | MLB | Lake | 30 min |
| Apr 25, 8:39 AM EDT | Severe Thunderstorm Warning | MLB | Lake, Seminole, Volusia | 36 min |
| Apr 25, 9:28 AM EDT | Special Weather Statement | MLB | Seminole | 32 min |
| Apr 25, 10:04 AM EDT | Special Marine Warning | MLB | 56 min | |
| Apr 25, 12:13 PM EDT | Special Weather Statement | MLB | Brevard | 32 min |
| Apr 25, 12:54 PM EDT | Special Weather Statement | MLB | Brevard | 36 min |
| Apr 25, 12:57 PM EDT | Special Marine Warning | MLB | 63 min | |
| Apr 25, 4:33 PM EDT | Special Marine Warning | MLB | 57 min | |
| Apr 25, 7:22 PM EDT | Special Marine Warning | MLB | 53 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.