Alert archive / Florida / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 20, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 12, 2013, 7:14 PM EDT for Hillsborough County, Manatee County, Sarasota County, Florida. It was in force for 46 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
- Jun 12, 2013, 7:14 PM EDT (23:14 UTC)
- Expired
- Jun 12, 2013, 8:00 PM EDT
- In force
- 46 min
- Issued by
- NWS Tampa Bay, FL
- Area
- Storm-based polygon
Counties Hillsborough County, FL, Manatee County, FL, Sarasota County, FL
The radar
The Tampa radar (KTBW), 21 km from the middle of the area, began a volume at 23:16 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
Cape Canaveral, FL (KXMR), launched 12:00Z, 11.2 hours before the alert went out and 211 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
- 1595 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 36 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 Jun 12, 4:22 PM EDT, 2 hours 52 minutes earlier.
Area forecast discussion, Jun 12, 4:22 PM EDT, 2 hours 52 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 422 PM EDT WED JUN 12 2013 .SHORT TERM (TONIGHT-FRIDAY)... SOME DRIER AIR BEGINNING TO MOVE INTO THE NORTHERN HALF OF THE AREA WHICH IS LIMITING CONVECTION. HOWEVER...ACROSS SOUTH OF THE RIDGE AXIS OVER OUR SOUTHERN ZONES THE MOISTURE REMAINS DEEP AND THIS IS COMBINING WITH THE SEA BREEZE AND OUTFLOW BOUNDARIES TO CAUSE SCATTERED TO NUMEROUS STORMS. CONVECTION WILL WIND DOWN THIS EVENING WITH MOSTLY CLEAR TO PARTLY CLOUDY SKIES OVERNIGHT. ON THURSDAY THE RIDGE AXIS WILL CONTINUE TO DRIFT SOUTH WITH THE DRIER AIR CONTINUING ACROSS THE NORTHERN HALF OF THE REGION AND WINDS BECOMING MORE WESTERLY ACROSS THE AREA. THIS WILL LIMIT RAIN CHANCES TO 20 PERCENT FOR ALL BUT THE SOUTHERN INTERIOR AND SOUTHWEST ZONES WHERE AM PLANNING ON GOING WITH 30 POPS. THURSDAY NIGHT INTO FRIDAY THE RIDGE AXIS SINKS INTO THE FLORIDA KEYS WITH A WEAKENING COLD FRONT DROPPING INTO NORTH FLORIDA AND EVENTUALLY OUR AREA DURING FRIDAY. MOISTURE WILL REMAIN LIMITED SO HAVE ONLY GONE WITH SLIGHT CHANCE POPS AT THIS TIME. HIGH TEMPERATURES WILL CLIMB INTO THE MID 90S OVER INLAND AREAS WITH THE WESTERLY WINDS OFF THE GULF KEEPING COASTAL AREAS IN THE 80S. OVERNIGHT LOWS WILL FALL TO AROUND 70 OVER INLAND AREAS AND REMAIN IN THE MID TO UPPER 70S CLOSE TO THE COAST. .LONG TERM (FRIDAY NIGHT-WEDNESDAY)... THE LONG TERM PERIOD BEGINS WITH A DECAYING FRONTAL BOUNDARY ACROSS THE PENINSULA. BY SATURDAY AFTERNOON...SURFACE AND UPPER LEVEL RIDGING WILL BUILD ACROSS THE REGION. THE SURFACE HIGH WILL SHIFT EAST THROUGH THE EARLY PART OF NEXT WEEK...WITH THE AXIS REMAINING NORTH OF THE AREA AND KEEPING EAST TO SOUTHEAST WINDS IN PLACE WITH A SEA BREEZE FORMING EACH AFTERNOON. BEST RAIN CHANCES WILL CONTINUE TO BE IN THE AFTERNOON AND EVENING HOURS EACH DAY... ALTHOUGH SOMEWHAT DRIER AIR WILL BE IN PLACE. TEMPERATURES WILL BE WITHIN A DEGREE OR TWO OF NORMAL VALUES. && .AVIATION... MAINLY VFR CONDITIONS WILL PERSIST WITH SCATTERED STORMS AROUND PGD...FMY AND RSW INTO THE EVENING HOURS. && .MARINE... SURFACE RIDGE AXIS WILL DRIFT SOUTH INTO THE FLORIDA STRAITS OVER THE NEXT FEW DAYS WITH AN INCREASING WESTERLY FLOW SETTING UP THROUGH FRIDAY THEN A MORE LIGHT AND VARIABLE FLOW WILL RETURN OVER THE WEEKEND. WINDS COULD REACH EXERCISE CAUTION CRITERIA OVER THE NORTHERN WATERS DURING FRIDAY. && .FIRE WEATHER... NO FIRE WEATHER CONCERNS FOR THE NEXT FEW DAYS. && .PRELIMINARY POINT TEMPS/POPS... TPA 76 91 76 90 / 20 10 10 20 FMY 73 91 74 91 / 20 30 20 20 GIF 73 94 73 93 / 20 20 10 20 SRQ 74 89 74 89 / 20 10 10 20 BKV 70 93 71 92 / 10 10 10 20 SPG 78 91 78 90 / 20 10 10 20 && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && SHORT TERM/MARINE/FIRE WEATHER...69/CLOSE LONG TERM...05/CARLISLE AVIATION...63/JILLSON
Hazardous weather outlook, Jun 12, 5:56 AM EDT, 13 hours 18 minutes before
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Local storm report, Jun 12, 5:55 PM EDT, 1 hour 19 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 |
|---|---|---|---|---|
| Jun 12, 3:53 PM EDT | Special Weather Statement | TBW | Lee | 37 min |
| Jun 12, 4:25 PM EDT | Special Weather Statement | TBW | Charlotte | 50 min |
| Jun 12, 4:33 PM EDT | Special Weather Statement | TBW | Lee | 42 min |
| Jun 12, 4:37 PM EDT | Areal Flood Advisory | TBW | Lee | 53 min |
| Jun 12, 4:37 PM EDT | Areal Flood Advisory | TBW | Charlotte | 53 min |
| Jun 12, 4:48 PM EDT | Severe Thunderstorm Warning | TBW | Lee | 27 min |
| Jun 12, 5:11 PM EDT | Special Weather Statement | TBW | Sarasota | 49 min |
| Jun 12, 5:23 PM EDT | Areal Flood Advisory | TBW | Lee | 67 min |
| Jun 12, 6:00 PM EDT | Areal Flood Advisory | TBW | Sarasota | 60 min |
| Jun 12, 6:06 PM EDT | Special Marine Warning | TBW | 39 min | |
| Jun 12, 6:26 PM EDT | Special Weather Statement | TBW | Polk | 49 min |
| Jun 12, 6:30 PM EDT | Special Weather Statement | TBW | Sarasota | 60 min |
| Jun 12, 7:02 PM EDT | Special Weather Statement | TBW | Manatee, Sarasota | 28 min |
| Jun 12, 7:50 PM EDT | Areal Flood Advisory | TBW | Manatee | 55 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2013Every severe thunderstorm warning in 2013
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.