Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 177, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 26, 1999, 3:11 PM EDT for Hardee County, Florida. It was in force for 34 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
- Jul 26, 1999, 3:11 PM EDT (19:11 UTC)
- Expired
- Jul 26, 1999, 3:45 PM EDT
- In force
- 34 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Hardee County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 26, 3:13 PM EDT | Thunderstorm Wind | Wauchula, FL | A Skywarn Spotter reported that thunderstorm winds downed several large tree limbs at the Paynes Creek State Historical Site. |
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
Tampa Bay, FL (KTBW), launched 12:00Z, 7.2 hours before the alert went out and 63 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
- 1692 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 911 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 1 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 Jul 26, 10:00 AM EDT, 5 hours 11 minutes earlier.
Area forecast discussion, Jul 26, 10:00 AM EDT, 5 hours 11 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN, FL 1000 AM EDT MON JUL 26 1999 12Z SURFACE ANALYSIS INDICATED HIGH PRESSURE RIDGE EXTENDED EAST TO WEST ACROSS SOUTH FLORIDA WHILE LOW PRESSURE TROUGH EXTENDED FROM THE CAROLINAS SOUTHWEST ACROSS NORTH FLORIDA. 12Z MID LEVEL ANALYSIS PAINTED AN EAST-WEST TROUGH BETWEEN 700-500MB THAT EXTENDED FROM THE NORTHEAST GULF OF MEXICO TO NEAR DAYTONA BEACH. UPPER LEVEL TUTT LOW EVIDENCED BETWEEN THE FLORIDA KEYS AND CUBA WITH A WEAKENING UPPER LEVEL DEFORMATION ZONE OVER NORTH FLORIDA. 12Z SKEW-T ANALYSIS INDICATED A SLIGHT INCREASE IN PRECIPITABLE WATER LEVELS TO 1.7-1.8 RANGE ACROSS WEST CENTRAL FLORIDA. WEST COAST AND UPSTREAM SOUNDINGS. LOW AND MID LEVELS WINDS CONSISTENTLY FROM THE WEST WHILE UPPER LEVEL WINDS ABOVE 250 FEET ARE NORTHEAST. CURRENT FORECAST ON TARGET AS PROJECTED MORNING SHOWER AND THUNDERSTORM ACTIVITY CONTINUES TO FIRE UP ALONG WEST FLORIDA COAST. DOWNWARD VERTICAL MOTIONS ALREADY EVIDENT ALONG AND BEHIND MID LEVEL TROUGH FROM LEVY COUNTY NORTH. TROUGH WILL ENHANCE CONVECTIVE ACTIVITY MAINLY OVER THE INTERIOR COUNTIES DURING THE AFTERNOON. WILL UPDATE ZONES FOR MINOR SEMANTIC ,CHANGES OTHERWISE POPS...TEMPS AND WINDS LOOK AOK. MOST RW/TRW ACTIVITY WILL MOVE WEST TO EAST ACROSS FORECAST AREA WITH SIGNIFICANT CIRRUS BLOWOFF EXPECTED BACK TOWARD THE COAST WITH TODAYS STORMS. ZALESKI
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 2:31 PM EDT | Tornado Warning | TBW | Hillsborough | 29 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999
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.