Alert archive / Florida / Flash Flood Warnings in 2024

Flash Flood Warning 1, NWS Tampa Bay, FL

June 11, 2024Manatee County, Sarasota County, Florida

NWS Tampa Bay, FL issued this flash flood warning at Jun 11, 2024, 6:50 PM EDT for Manatee County, Sarasota County, Florida. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 11, 2024, 6:50 PM EDT (22:50 UTC)
Expired
Jun 11, 2024, 10:00 PM EDT
In force
3 hr
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon
Flood severity
None

Counties Manatee County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 42 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 266 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.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2024-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2397 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2024-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2397 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jun 11, 2:59 PM EDT, 3 hours 51 minutes earlier.

Area forecast discussion, Jun 11, 2:59 PM EDT, 3 hours 51 minutes before
Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
259 PM EDT Tue Jun 11 2024

...Flood Watch in Effect for Charlotte and Lee Counties through
Thursday Evening...

.DISCUSSION...
The pattern aloft over the region this afternoon features troughing
from the southeast extending over Florida and ridging centered to
the southeast of the state. Flow in between these features remains
out of the southwest, helping to transport a deep plume of tropical
moisture over the peninsula and generally keeping Florida within a
favorable region for divergence aloft. At the surface, a boundary
remains stalled across northern Florida, with a weak disturbance
trying to form along it. This whole setup has led to widespread
showers with embedded thunderstorms, mainly from just north of I-4
southward, with more scattered convection to the north. For the rest
of today, the highest rainfall totals should continue to be over
this same region and then for tonight, hi-res guidance continues to
show a period of lower coverage before picking back up again late
tonight into early tomorrow morning. Highest rainfall totals have so
far been mainly over Lee County (5 inches or so) with a few other
areas seeing 2-4 inches in some training and then 1-3 inches
elsewhere. The potential remains to see another 1 to 3 inches
through today, and this will likely continue to cause some localized
flooding in these areas. The rest of the region should be able to
handle the rain given how dry it has been, and if we do get a bit of
a break tonight, that will help even more. However, this is all
dependent on where the heaviest rain falls and in what timeframe, so
things could certainly change as far as the Flood Watch, which
remains in effect for Charlotte and Lee Counties through at least
Thursday evening.

The forecast does not change a whole lot through the rest of the
week and into the weekend, with the highest rain chances continuing
for the southern half of the area. Event rainfall totals could end
up being over a foot or higher for some locations over southwest
Florida and likely much closer toward the Nature Coast. This heavy
rainfall and possible flooding will continue to be the main issue
over the next several days, and conditions will have to be closely
monitored for possible watches or warnings, especially with multiple
rounds of heavy rainfall expected to impact the same locations over
the next few days.

&&

.AVIATION...
(18Z TAFS)
Numerous showers with some embedded thunderstorms continue across
the region this afternoon, with some higher wind gusts along with
MVFR or lower conditions expected periodically. Model guidance
continues to suggest a short break in the heavier rainfall for part
of tonight, then additional widespread rainfall is expected for
Wednesday. Similar to today, cigs and vsbys will likely go VFR
outside of activity, but timing could still be rather tough to
pin down.

&&

.MARINE...
Tropical moisture will continue to lift north over the region, with
southwest to south winds continuing. Multiple rounds of showers with
embedded thunderstorms are expected through the end of the week,
with winds and seas higher near storms.

&&

.FIRE WEATHER...
Numerous to widespread showers and some embedded thunderstorms will
continue through the next several days as deep tropical moisture
continues over the region. No fire weather concerns.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA  78  87  78  87 /  70  80  80  80
FMY  76  85  76  86 /  90 100  90 100
GIF  76  87  75  88 /  60  80  70  80
SRQ  77  86  76  89 /  80  90  90  90
BKV  72  88  72  91 /  60  80  70  80
SPG  80  86  80  89 /  70  90  80  80

&&

Sea Breeze Thunderstorm Regime For Wednesday: 5
Sea Breeze Thunderstorm Regime For Thursday: 4

For additional information on sea breeze regimes, go to:
     https://www.weather.gov/tbw/ThunderstormClimatology

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...Flood Watch through Thursday evening for Coastal Charlotte-
     Coastal Lee-Inland Charlotte-Inland Lee.

Gulf waters...None.

&&

05/Carlisle

The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 11, 2:03 AM EDTSpecial Marine WarningTBW27 min
Jun 11, 8:36 AM EDTAreal Flood AdvisoryTBWLee3 hr
Jun 11, 10:48 AM EDTRiver Flood WarningTBWDeSoto11 hr
Jun 11, 12:52 PM EDTSpecial Marine WarningTBW23 min
Jun 11, 1:46 PM EDTFlood WatchTBWCharlotte, DeSoto, Hardee, Lee, Manatee, Sarasota3 days
Jun 11, 2:47 PM EDTAreal Flood AdvisoryTBWPasco, Pinellas2 hr
Jun 11, 6:15 PM EDTAreal Flood AdvisoryTBWManatee, Sarasota3 hr

Nearby

Flash Flood Warnings in Florida, 2024Every flash flood warning in 2024

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.