Alert archive / Florida / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 29, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Oct 28, 2021, 1:00 PM EDT for 4 counties in Florida. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 28, 2021, 1:00 PM EDT (17:00 UTC)
- Expired
- Oct 28, 2021, 1:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hillsborough County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL
The radar
The Tampa radar (KTBW), 70 km from the middle of the area, began a volume at 16:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 28, 1:10 PM EDT | TSTM WND DMG | 6 Ene Moon Lake Estates, FL | TREES DOWN ON US 41 NORTH OF SR 52 IN SPRING HILL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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
Tampa Bay, FL (KTBW), launched 12:00Z, 5.0 hours before the alert went out and 70 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
- 1406 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 10.9
The text
As transmitted.
269
WUUS52 KTBW 281700
SVRTBW
FLC057-101-103-105-281745-
/O.NEW.KTBW.SV.W.0029.211028T1700Z-211028T1745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
100 PM EDT Thu Oct 28 2021
The National Weather Service in Ruskin has issued a
* Severe Thunderstorm Warning for...
Pasco County in west central Florida...
North central Pinellas County in west central Florida...
Northwestern Polk County in central Florida...
Northern Hillsborough County in west central Florida...
* Until 145 PM EDT.
* At 1259 PM EDT, a severe thunderstorm was located near Keystone, or
near New Port Richey, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Tampa, Safety Harbor, New Port Richey, Oldsmar, Zephyrhills, Dade
City, St. Leo, San Antonio, Saint Leo and Trinity.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 500 PM EDT for central and
west central Florida.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.
A Tornado Watch remains in effect until 500 PM EDT for central and
west central Florida.
&&
LAT...LON 2844 8231 2843 8225 2846 8225 2848 8219
2813 8203 2802 8270 2827 8275
TIME...MOT...LOC 1659Z 255DEG 41KT 2819 8263
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TBWThe office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 4:01 AM EDT | Gale Warning | TBW | 43 hr | |
| Oct 28, 4:01 AM EDT | Small Craft Advisory | TBW | 64 hr | |
| Oct 28, 7:42 AM EDT | Special Marine Warning | TBW | 33 min | |
| Oct 28, 10:16 AM EDT | Special Marine Warning | TBW | 59 min | |
| Oct 28, 10:48 AM EDT | Special Weather Statement | TBW | Levy | 42 min |
| Oct 28, 11:15 AM EDT | Special Marine Warning | TBW | 60 min | |
| Oct 28, 11:29 AM EDT | Special Weather Statement | TBW | Citrus, Levy | 61 min |
| Oct 28, 12:17 PM EDT | Special Marine Warning | TBW | 58 min | |
| Oct 28, 12:29 PM EDT | Special Weather Statement | TBW | Citrus, Hernando, Pasco, Sumter | 61 min |
| Oct 28, 1:02 PM EDT | Special Weather Statement | TBW | Hillsborough, Manatee, Pinellas, Sarasota | 58 min |
| Oct 28, 1:16 PM EDT | Tornado Warning | TBW | Hillsborough, Pinellas | 13 min |
| Oct 28, 1:18 PM EDT | Special Marine Warning | TBW | 57 min | |
| Oct 28, 1:19 PM EDT | Tornado Warning | TBW | Manatee, Sarasota | 26 min |
| Oct 28, 1:33 PM EDT | Special Weather Statement | TBW | Sumter | 42 min |
| Oct 28, 1:52 PM EDT | Tornado Warning | TBW | Hardee, Manatee, Sarasota | 23 min |
| Oct 28, 1:59 PM EDT | Special Weather Statement | TBW | Hillsborough, Manatee, Sarasota | 46 min |
| Oct 28, 2:10 PM EDT | Special Marine Warning | TBW | 65 min | |
| Oct 28, 2:14 PM EDT | Tornado Warning | TBW | Manatee | 16 min |
| Oct 28, 2:27 PM EDT | Tornado Warning | TBW | Hardee, Manatee | 18 min |
| Oct 28, 2:46 PM EDT | Special Weather Statement | TBW | DeSoto, Hardee, Polk | 44 min |
| Oct 28, 2:54 PM EDT | Tornado Warning | TBW | Manatee, Sarasota | 21 min |
| Oct 28, 2:57 PM EDT | Tornado Warning | TBW | DeSoto | 18 min |
| Oct 28, 3:11 PM EDT | Tornado Warning | TBW | DeSoto, Hardee | 19 min |
| Oct 28, 3:18 PM EDT | Special Marine Warning | TBW | 57 min | |
| Oct 28, 3:36 PM EDT | Special Weather Statement | TBW | Charlotte, DeSoto, Hardee, Highlands | 39 min |
| Oct 28, 4:29 PM EDT | Special Marine Warning | TBW | 46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.