Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jul 9, 2021, 7:39 PM EDT for Osceola County, Florida. It was in force for 28 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 9, 2021, 7:39 PM EDT (23:39 UTC)
- Expired
- Jul 9, 2021, 8:07 PM EDT
- In force
- 28 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Osceola County, FL
The radar
The Melbourne radar (KMLB), 44 km from the middle of the area, began a volume at 23:39 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, 11.7 hours before the alert went out and 73 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
- 662 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1052 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
778
WUUS52 KMLB 092339
SVRMLB
FLC097-100030-
/O.NEW.KMLB.SV.W.0025.210709T2339Z-210710T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
739 PM EDT Fri Jul 9 2021
The National Weather Service in Melbourne has issued a
* Severe Thunderstorm Warning for...
Northeastern Osceola County in east central Florida...
* Until 830 PM EDT.
* At 739 PM EDT, a severe thunderstorm was located over Holopaw, 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...
Holopaw and Forever Florida.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2801 8119 2820 8113 2820 8099 2799 8100
TIME...MOT...LOC 2339Z 303DEG 3KT 2813 8107
HAIL...1.00IN
WIND...60MPH
$$
Combs2 follow-up statements
019
WWUS52 KMLB 092354
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
754 PM EDT Fri Jul 9 2021
FLC097-100030-
/O.CON.KMLB.SV.W.0025.000000T0000Z-210710T0030Z/
Osceola FL-
754 PM EDT Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR EAST CENTRAL OSCEOLA COUNTY...
At 754 PM EDT, a severe thunderstorm was located over Holopaw, and is
nearly stationary.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Holopaw and Forever Florida.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2801 8119 2816 8111 2816 8099 2799 8100
TIME...MOT...LOC 2354Z 313DEG 3KT 2809 8106
HAIL...1.00IN
WIND...60MPH
$$
Combs937
WWUS52 KMLB 100007
SVSMLB
Severe Weather Statement
National Weather Service Melbourne FL
807 PM EDT Fri Jul 9 2021
FLC097-100017-
/O.CAN.KMLB.SV.W.0025.000000T0000Z-210710T0030Z/
Osceola FL-
807 PM EDT Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL OSCEOLA 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, frequent lightning, and heavy
rain are still possible with this thunderstorm.
LAT...LON 2801 8119 2816 8111 2816 8099 2799 8100
TIME...MOT...LOC 0005Z 303DEG 3KT 2808 8105
$$
CombsThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 4:46 PM EDT | Special Weather Statement | MLB | Volusia | 29 min |
| Jul 9, 5:06 PM EDT | Special Weather Statement | MLB | Seminole | 39 min |
| Jul 9, 5:16 PM EDT | Special Weather Statement | MLB | Flagler | 29 min |
| Jul 9, 5:38 PM EDT | Special Weather Statement | MLB | Volusia | 37 min |
| Jul 9, 5:45 PM EDT | Areal Flood Advisory | MLB | Lake, Volusia | 60 min |
| Jul 9, 5:52 PM EDT | Special Marine Warning | MLB | 53 min | |
| Jul 9, 6:30 PM EDT | Special Weather Statement | MLB | Orange | 60 min |
| Jul 9, 6:54 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 18 min |
| Jul 9, 7:02 PM EDT | Tornado Warning | MLB | Orange | 13 min |
| Jul 9, 7:31 PM EDT | Special Weather Statement | MLB | Osceola | 44 min |
| Jul 9, 7:49 PM EDT | Special Marine Warning | MLB | 41 min | |
| Jul 9, 7:51 PM EDT | Special Weather Statement | MLB | Brevard | 24 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.