Alert archive / Florida / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 30, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at May 22, 2020, 7:28 PM EDT for Hillsborough County, Pinellas County, Florida. It was in force for 32 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
- May 22, 2020, 7:28 PM EDT (23:28 UTC)
- Expired
- May 22, 2020, 8:00 PM EDT
- In force
- 32 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Hillsborough County, FL, Pinellas County, FL
The radar
The Tampa radar (KTBW), 26 km from the middle of the area, began a volume at 23:29 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
Tampa Bay, FL (KTBW), launched 12:00Z, 11.5 hours before the alert went out and 26 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
- 11 J/kg
- Mixed-layer CIN
- -296 J/kg
- Mixed-layer LCL
- 1562 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 7 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 May 22, 2:45 PM EDT, 4 hours 43 minutes earlier.
Area forecast discussion, May 22, 2:45 PM EDT, 4 hours 43 minutes before
Area Forecast Discussion National Weather Service Tampa Bay Ruskin FL 245 PM EDT Fri May 22 2020 .DISCUSSION... Subtle changes to pattern aloft over the region during the past 24 hours, with less pronounced westerly flow throughout the column. Eastern CONUS cut-off low to the north continues to gradually fill and lift out, while at the surface a lingering frontal boundary is slowly lifting north across the Northern Gulf states north of ridging across the Peninsula this afternoon. Mean flow below 700mb per this morning's 12Z upper-air sounding was less than 10 knots out the of southeast, which typically corresponds to more active afternoon and evening sea breeze shower and storm activity over the Western Peninsula. As such, greatest PoPs will likely straddle the I-75 corridor and points a bit east this afternoon into the evening as the sea breeze migrates inland. Some interior areas will be subject to showers and storms as well as the east coast sea breeze pushes across the Peninsula with outflow from its storms moving into the area. Warmer with highs in the upper 80s along the immediate coast to the mid 90s interior, and lows tonight in the upper 60s/lower 70s. Ridging aloft builds over the Eastern CONUS this weekend into next week along with surface ridging over the state, allowing deep layer east/southeast flow to setup over the region with tropical moisture advecting over the Peninsula. Showers and thunderstorms will be featured daily with greatest chances associated with sea breeze location and propagation. After a toasty weekend with highs into the low/mid 90s for most areas, temperatures will moderate a bit through the first half of next week with highs in the upper 80s to around 90 degrees, and lows in the upper 60s/lower 70s. Eastern CONUS ridging may weaken slightly toward the end of the week but expect overall conditions to remain more or less the same across the Peninsula. && .AVIATION... VFR expected through period with VCTS affecting terminals through 02- 03Z with MVFR/brief IFR conditions possible in TSRA. Southwest winds at northern terminals veering northwest at TPA/PIE after 21Z and southeast winds at southern terminals...decreasing to light/variable after 02Z...then increasing out of the southeast after 14Z. && .MARINE... High pressure ridging north of the waters in place through early next week with generally east to southeast winds turning onshore near the coast with afternoon sea breezes. Locally hazardous winds and seas will be possible with afternoon and evening thunderstorms. && .FIRE WEATHER... High pressure ridging over northern Florida will keep southeast to east winds in place with onshore flow at coastal locations during the afternoons in association with the sea breeze each day. Warm and humid air mass will favor scattered to numerous afternoon showers and thunderstorms. High dispersion indices expected during the afternoons, mainly across inland locations. && .Preliminary Point Temps/PoPs... TPA 73 92 74 91 / 40 40 20 40 FMY 73 91 72 88 / 30 60 30 60 GIF 71 92 72 90 / 20 40 10 40 SRQ 72 91 72 90 / 30 40 30 50 BKV 69 94 69 93 / 30 40 20 40 SPG 73 91 73 90 / 40 40 30 50 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...None. Gulf waters...None. && DISCUSSION/AVIATION/MARINE/FIRE WEATHER...Hurt DECISION SUPPORT...Oglesby
In the hours before
Special weather statement, May 22, 6:51 PM EDT, 37 minutes before
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</html>Local storm report, May 22, 7:01 PM EDT, 27 minutes before
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</html>Local storm report, May 22, 7:11 PM EDT, 17 minutes before
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</html>Local storm report, May 22, 7:12 PM EDT, 16 minutes before
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</html>Special weather statement, May 22, 7:14 PM EDT, 14 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 |
|---|---|---|---|---|
| May 22, 4:35 PM EDT | Special Weather Statement | TBW | Sarasota | 25 min |
| May 22, 4:52 PM EDT | Special Weather Statement | TBW | Charlotte, Lee | 53 min |
| May 22, 5:29 PM EDT | Special Weather Statement | TBW | Manatee | 31 min |
| May 22, 5:42 PM EDT | Special Marine Warning | TBW | 48 min | |
| May 22, 5:48 PM EDT | Special Weather Statement | TBW | Charlotte, Lee | 42 min |
| May 22, 6:33 PM EDT | Special Marine Warning | TBW | 42 min | |
| May 22, 6:38 PM EDT | Areal Flood Advisory | TBW | Lee | 82 min |
| May 22, 6:51 PM EDT | Special Weather Statement | TBW | Sumter | 39 min |
| May 22, 7:03 PM EDT | Special Marine Warning | TBW | 27 min | |
| May 22, 7:14 PM EDT | Special Weather Statement | TBW | Hillsborough | 46 min |
| May 22, 7:32 PM EDT | Special Marine Warning | TBW | 28 min | |
| May 22, 7:37 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 23 min |
| May 22, 7:57 PM EDT | Special Marine Warning | TBW | 33 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.