Alert archive / Florida / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 45, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Sep 29, 2020, 4:49 PM EDT for Polk County, Florida. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 29, 2020, 4:49 PM EDT (20:49 UTC)
- Expired
- Sep 29, 2020, 5:15 PM EDT
- In force
- 26 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Polk County, FL
The radar
The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 20:53 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, 8.8 hours before the alert went out and 275 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
- 1545 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 28, 7:50 PM EDT, 20 hours 59 minutes earlier.
Area forecast discussion, Sep 28, 7:50 PM EDT, 20 hours 59 minutes before
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</html>The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 10:22 PM EDT | River Flood Warning | TBW | DeSoto | 10 days |
| Sep 29, 10:15 AM EDT | River Flood Warning | TBW | Pasco | 22 hr |
| Sep 29, 2:31 PM EDT | Small Craft Advisory | TBW | 21 hr | |
| Sep 29, 2:37 PM EDT | Rip Current Statement | TBW | Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota | 29 hr |
| Sep 29, 3:44 PM EDT | Special Marine Warning | TBW | 31 min | |
| Sep 29, 3:51 PM EDT | Special Weather Statement | TBW | Pinellas | 24 min |
| Sep 29, 4:03 PM EDT | Special Weather Statement | TBW | Hardee | 27 min |
| Sep 29, 4:27 PM EDT | Special Weather Statement | TBW | Polk | 48 min |
| Sep 29, 4:58 PM EDT | River Flood Warning | TBW | Hillsborough | 39 hr |
| Sep 29, 5:16 PM EDT | Special Weather Statement | TBW | Polk | 14 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2020Every severe thunderstorm warning in 2020
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.