Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 137, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 21, 2001, 6:01 PM EDT for Hardee County, Florida. It was in force for 29 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 21, 2001, 6:01 PM EDT (22:01 UTC)
- Expired
- Aug 21, 2001, 6:30 PM EDT
- In force
- 29 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Hardee County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 21, 6:05 PM EDT | Thunderstorm Wind | Lily, FL | The public reported several large to medium sized tree branches were downed by thunderstorm winds along and south of County Road 665 between Lily and Limestone over rural southwest Hardee county. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 10.0 hours before the alert went out and 168 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
- 2741 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Aug 21, 2:15 PM EDT, 3 hours 46 minutes earlier.
Area forecast discussion, Aug 21, 2:15 PM EDT, 3 hours 46 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 215 PM EDT TUE AUG 21 2001 CURRENTLY...SCT SHOWERS/TSTMS HAVE MOVED INTO THE SW FA FROM MOISTURE THAT HAD PUSHED IN FROM THE SE GULF MENTIONED EARLIER. SCT SHOWERS/TSTMS ALSO FORMING ALONG WEST COAST SEA BREEZE NORTH OF TPA...AS WELL AS OVER SE HIGHLAND NEAR THE LAKE. --FCST DISC-- MODELS CONTINUE TO ADVERTISE DRYING TREND WED AND THURS...WITH THE ETA STILL THE DRIEST. THIS APPEARS REASONABLE GIVEN THE DRY SLOT SEEN OVER THE CENT GULF BEHIND THE UPPER TROF. THE UPPER TROF AXIS FINALLY MOVES EAST OF THE AREA LATER TONIGHT...ALLOWING THE UPPER RIDGE TO BUILD OVER THE SE US...WHICH RELOCATES SFC RIDGE AXIS NORTH OF THE AREA AS WELL. THIS WILL ALLOW WEAK EASTERLY LOW LEVEL FLOW WITH AFTN SEA BREEZES. HIGHEST MOISTURE WILL REMAIN OVER THE S FA. THUS...WILL TAPER POPS FROM ISOLD N 2/3 TO CHC S 1/4 OF THE FA. WITH MORE SUN AND EASTERLY FLOW...MAXES SHOULD REMAIN VERY HOT IN THE LOWER TO MID 90S. HOWEVER...HUMIDITY IS EXPECTED TO BE LOWER...WHICH SHOULD ALLOW MINS TO BE SLIGHTLY COOLER. --EXTENDED-- AVN PUSHES THE SFC RIDGE AXIS BACK TOWARD THE CENT FA FRI...AND THEN THE S FA SAT AND SUN AS ANOTHER BROAD UPPER TROF FORMS OVER THE E US. THE UPPER LOW THAT THE MODELS HAVE BEEN HINTING AT OFF THE FL EAST COAST BEGINNING IN THE SHORT TERM (LATE WED) STICKS AROUND THROUGH LATE FRI ACCORDING THE AVN BEFORE MOVING NE. A SFC LOW/WAVE SPAWNS ON THE SE SIDE OF THIS UPPER SYSTEM...AND MOVES NE...STAYING WELL EAST OF THE AREA OVER THE ATLC. WILL NEED TO CONTINUE MONITORING LATER RUNS TO SEE HOW THIS UPPER LOW EVOLVES. FOR NOW...NOT PLANNING ON MUCH IMPACT. --MARINE-- NO HIGHLIGHTS OR SIGNIFICANT CHANGES EXPECTED. PRELIM S: TPA 077/092 076/092 2222 FMY 077/093 076/093 3333= .TBW...NONE. MORALES
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 3:11 PM EDT | Severe Thunderstorm Warning | TBW | Hillsborough | 34 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.