Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 106, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 1, 2001, 5:13 PM EDT for 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
- Jul 1, 2001, 5:13 PM EDT (21:13 UTC)
- Expired
- Jul 1, 2001, 5:45 PM EDT
- In force
- 32 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Whole counties
County Pinellas County, FL
The radar
The Tampa radar (KTBW), 40 km from the middle of the area, began a volume at 21:16 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
Jacksonville, FL (KJAX), launched 12:00Z, 9.2 hours before the alert went out and 306 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
- 1500 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 741 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 0 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 1, 1:56 PM EDT, 3 hours 17 minutes earlier.
Area forecast discussion, Jul 1, 1:56 PM EDT, 3 hours 17 minutes before
WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 156 PM EDT SUN JUL 1 2001 FOR TONIGHT...I EXPECT AN ACTIVE CONVECTIVE PATTERN TO CONTINUE AND POSSIBLY RUN TO FAIRLY LATE...AS OUR COAST SEEMS BE BE MORE INFLUENCED BY THE NEARLY STATIONARY EASTERLY WAVE IN THE GULF THAN THE TUTT LOW OFF THE ATLANTIC COAST. AS FOR THE WAVE CONVECTION CONTINUES TO FLAIR UP EVEN MORE SO THAN YESTERDAY. THE UPPER LOW THAT IS THE DRIVING FORCE BEHIND THE SURFACE FEATURE IS DRIFTING TO THE SOUTH AND WEST. DIFLUENCE IS INCREASING AND GIVING THE CONVECTION A BOOST. ON THE NEGATIVE SIDE FOR ANY DEVELOPMENT THERE IS A LOT OF SHEAR STILL IN THE AREA. THERE OF COURSE IS NOT A LOT OF DATA IN THE GULF AND MOST ALL OF THE WINDS...BEST I CAN TELL ARE CONVECTIVELY DRIVEN...BY THAT I MEAN DISORGANIZED MESOSCALE INFLOWS AND OUTFLOWS...BUT...CONSIDERING ITS PROXIMITY AND POSSIBLE EFFECTS ON OUR MARINE FORECAST WE NEED TO KEEP AN EYE ON IT. UPSTREAM AN UPPER LOW JUST EAST OF THE NORTHERN BAHAMAS IS STARTING TO SPREAD SOME SUBSIDENCE TO THE PENINSULA. THE STRONGER SUBSIDENCE REMAINS OFF SHORE. INTERESTINGLY IT IS STARTING TO ENHANCE A SURFACE WAVE ON ITS SOUTHEAST SIDE. MODEL INDICATIONS ARE THAT THIS TUTT LOW WILL DRIFT SOUTH AND WEST ACROSS CUBA OVER THE NEXT COUPLE DAYS...BUT MODELS DO NOT HANDLE THESE SYSTEMS WELL. IT SEEMS TO BE CUTTING OFF FROM THE TUTT AXIS AND SO A SLOW SOUTHWEST DRIFT SEEMS REASONABLE. BECAUSE OF THIS SYSTEM AND FLORIDA BEING ON THE SUBSIDENT SIDE I WILL CONTINUE THE TREND OF SLIGHTLY LOWER POPS IN THE FORECAST. TUESDAY AND BEYOND...THE MODELS ARE A LITTLE SLOWER IN DROPPING THE EAST COAST LONG WAVE TROUGH SOUTHWARD. IT LOOKS LIKE WE WILL NOT TRANSITION TO WESTERLY FLOW NOW UNTIL THURSDAY. TYPICALLY THE AVN HANDLES THESE LONGWAVE PATTERNS PRETTY WELL BUT WITH ALL OF THE TROPICAL CONVECTION AROUND WARMING THE ATMOSPHERE I WONDER IF THE AVN IS STILL A LITTLE TOO AMBITIOUS WITH THE TROUGH. FOR THE EXTENDED I WILL CONTINUE PERSISTENCE EXCEPT FOR A FEW SUBTLE TIMING CHANGES. NO MARINE OR FIRE WEATHER ISSUES AT THIS TIME...BUT WILL KEEP AN EYE TO THE WEST AS STATED ABOVE. PRELIMINARY NUMBERS TPA 074/090 075/091 075 3424 FMY 074/091 075/092 075 2323 .TBW...NONE. SOBIEN
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.