Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 13, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 19, 2021, 5:48 AM EDT for Polk County, Florida. It was in force for 42 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 19, 2021, 5:48 AM EDT (09:48 UTC)
- Expired
- Apr 19, 2021, 6:30 AM EDT
- In force
- 42 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Polk County, FL
The radar
The Melbourne radar (KMLB), 69 km from the middle of the area, began a volume at 09:52 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 00:00Z, 9.8 hours before the alert went out and 108 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
- 939 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 2.4
The text
As transmitted.
724
WUUS52 KTBW 190948
SVRTBW
FLC105-191030-
/O.NEW.KTBW.SV.W.0013.210419T0948Z-210419T1030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
548 AM EDT Mon Apr 19 2021
The National Weather Service in Ruskin has issued a
* Severe Thunderstorm Warning for...
Southeastern Polk County in central Florida...
* Until 630 AM EDT.
* At 548 AM EDT, a severe thunderstorm was located 13 miles northeast
of Avon Park, moving east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
River Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2765 8113 2765 8139 2778 8141 2781 8120
2778 8119 2776 8118 2775 8118 2774 8116
2773 8117 2771 8115 2767 8115 2766 8113
TIME...MOT...LOC 0948Z 267DEG 17KT 2769 8131
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
TBW1 follow-up statement
642
WWUS52 KTBW 191002
SVSTBW
Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
602 AM EDT Mon Apr 19 2021
FLC105-191030-
/O.CON.KTBW.SV.W.0013.000000T0000Z-210419T1030Z/
Polk FL-
602 AM EDT Mon Apr 19 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM EDT
FOR SOUTHEASTERN POLK COUNTY...
At 602 AM EDT, a severe thunderstorm was located 13 miles northwest
of Kissimmee Prarie Preserve, or 15 miles south of Lake Kissimmee,
moving east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
River Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 2765 8113 2765 8130 2774 8131 2781 8120
2778 8119 2776 8118 2775 8118 2774 8116
2773 8117 2771 8115 2767 8115 2766 8113
TIME...MOT...LOC 1002Z 267DEG 17KT 2769 8124
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
TBWThe office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 9:23 PM EDT | Special Marine Warning | TBW | 37 min | |
| Apr 18, 9:26 PM EDT | Tornado Warning | TBW | Hillsborough, Pasco, Pinellas | 34 min |
| Apr 18, 9:55 PM EDT | Special Weather Statement | TBW | Pinellas | 35 min |
| Apr 18, 10:53 PM EDT | Special Weather Statement | TBW | Polk | 22 min |
| Apr 18, 11:16 PM EDT | Special Weather Statement | TBW | Polk | 44 min |
| Apr 19, 3:33 AM EDT | Special Marine Warning | TBW | 57 min | |
| Apr 19, 4:14 AM EDT | Special Weather Statement | TBW | Polk | 46 min |
| Apr 19, 4:18 AM EDT | Special Weather Statement | TBW | Manatee | 27 min |
| Apr 19, 4:26 AM EDT | Severe Thunderstorm Warning | TBW | Polk | 34 min |
| Apr 19, 4:57 AM EDT | Special Marine Warning | TBW | 63 min | |
| Apr 19, 5:01 AM EDT | Special Weather Statement | TBW | Polk | 44 min |
| Apr 19, 5:42 AM EDT | Special Weather Statement | TBW | Hardee | 48 min |
| Apr 19, 5:58 AM EDT | Areal Flood Advisory | TBW | Polk | 2 hr |
| Apr 19, 6:06 AM EDT | Special Marine Warning | TBW | 39 min | |
| Apr 19, 6:36 AM EDT | Special Weather Statement | TBW | Hardee | 39 min |
| Apr 19, 6:44 AM EDT | Tornado Warning | TBW | Hardee | 36 min |
| Apr 19, 7:19 AM EDT | Special Weather Statement | TBW | Highlands | 41 min |
| Apr 19, 7:57 AM EDT | Areal Flood Advisory | TBW | Hardee, Highlands | 2 hr |
| Apr 19, 8:00 AM EDT | Special Weather Statement | TBW | Highlands | 60 min |
| Apr 19, 10:36 AM EDT | Special Weather Statement | TBW | Charlotte | 39 min |
| Apr 19, 2:22 PM EDT | Rip Current Statement | TBW | Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota | 30 hr |
| Apr 19, 3:00 PM EDT | Special Weather Statement | TBW | Highlands | 30 min |
| Apr 19, 3:33 PM EDT | Severe Thunderstorm Warning | TBW | Highlands | 27 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.