Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 73, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Dec 21, 2021, 11:08 AM EST for Miami-Dade County, Florida. It was in force for 22 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
- Dec 21, 2021, 11:08 AM EST (16:08 UTC)
- Expired
- Dec 21, 2021, 11:30 AM EST
- In force
- 22 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Miami-Dade County, FL
The radar
The Miami radar (KAMX), 27 km from the middle of the area, began a volume at 16:09 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
Miami, FL (KMFL), launched 12:00Z, 4.1 hours before the alert went out and 17 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
- 601 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 844 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.4
The text
As transmitted.
405
WUUS52 KMFL 211608
SVRMFL
FLC086-211630-
/O.NEW.KMFL.SV.W.0073.211221T1608Z-211221T1630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
1108 AM EST Tue Dec 21 2021
The National Weather Service in Miami has issued a
* Severe Thunderstorm Warning for...
Central Miami-Dade County in southeastern Florida...
* Until 1130 AM EST.
* At 1107 AM EST, a severe thunderstorm was located over Key
Biscayne, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Miami, Miami Beach, Key Biscayne, Virginia Key and Fisher Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2566 8021 2573 8022 2577 8016 2578 8012
2570 8010
TIME...MOT...LOC 1607Z 254DEG 26KT 2572 8018
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kelly1 follow-up statement
454
WWUS52 KMFL 211620
SVSMFL
Severe Weather Statement
National Weather Service Miami FL
1120 AM EST Tue Dec 21 2021
FLC086-211630-
/O.EXP.KMFL.SV.W.0073.000000T0000Z-211221T1630Z/
Miami-Dade FL-
1120 AM EST Tue Dec 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MIAMI-DADE COUNTY WILL
EXPIRE AT 1130 AM EST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 2566 8021 2573 8022 2577 8016 2578 8012
2570 8010
TIME...MOT...LOC 1620Z 254DEG 26KT 2574 8008
$$
KellyThe office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 7:22 PM EST | Rip Current Statement | MFL | Broward, Collier, Miami-Dade, Palm Beach | 48 hr |
| Dec 21, 1:34 AM EST | Gale Warning | MFL | 20 hr | |
| Dec 21, 1:34 AM EST | Small Craft Advisory | MFL | 8 hr | |
| Dec 21, 1:34 AM EST | Small Craft Advisory | MFL | 44 hr | |
| Dec 21, 3:28 AM EST | Special Marine Warning | MFL | 62 min | |
| Dec 21, 3:34 AM EST | Wind Advisory | MFL | Collier, Glades, Hendry, Palm Beach | 14 hr |
| Dec 21, 4:06 AM EST | Special Marine Warning | MFL | 39 min | |
| Dec 21, 4:38 AM EST | Special Marine Warning | MFL | 52 min | |
| Dec 21, 5:18 AM EST | Special Marine Warning | MFL | 57 min | |
| Dec 21, 5:41 AM EST | Special Weather Statement | MFL | Collier | 49 min |
| Dec 21, 7:45 AM EST | Special Marine Warning | MFL | 30 min | |
| Dec 21, 7:57 AM EST | Special Weather Statement | MFL | Palm Beach | 33 min |
| Dec 21, 8:06 AM EST | Special Marine Warning | MFL | 39 min | |
| Dec 21, 8:27 AM EST | Special Weather Statement | MFL | Collier | 48 min |
| Dec 21, 8:59 AM EST | Special Weather Statement | MFL | Broward | 46 min |
| Dec 21, 9:45 AM EST | Special Weather Statement | MFL | Miami-Dade | 45 min |
| Dec 21, 10:25 AM EST | Special Weather Statement | MFL | Miami-Dade | 50 min |
| Dec 21, 10:28 AM EST | Special Marine Warning | MFL | 92 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.