Alert archive / Florida / Mesoscale Discussions in 2003
Mesoscale Discussion 341
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2003, 1:36 PM EST for 44 counties in Florida. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2003, 1:36 PM EST (18:36 UTC)
- Expired
- Mar 27, 2003, 3:00 PM EST
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 44 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Charlotte County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, DeSoto County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Glades County, FL, Hamilton County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lafayette County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Martin County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Saint Lucie County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Suwannee County, FL, Union County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 61 km from the middle of the area, began a volume at 18:40 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 6.6 hours before the alert went out and 61 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
- 845 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 820 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
132 ACUS11 KWNS 271836 SWOMCD SPC MCD 271836 FLZ000-GAZ000-272000- MESOSCALE DISCUSSION 0341 NWS STORM PREDICTION CENTER NORMAN OK 1236 PM CST THU MAR 27 2003 AREAS AFFECTED...FL CONCERNING...SEVERE THUNDERSTORM WATCH 78... VALID 271836Z - 272000Z SUPERCELLS IN NCNTRL FL WILL HAVE A LARGE HAIL/HIGH WIND THREAT WITH THE POTENTIAL FOR A BRIEF ISOLATED TORNADO OVER THE NEXT FEW HOURS. OTHER SEVERE STORMS NEAR TAMPA BAY WILL HAVE THE POTENTIAL FOR LARGE HAIL. OUTFLOW BOUNDARY AS SEEN FROM JACKSONVILLE 88D HAS MOVED SW ACROSS NCNTRL FL AHEAD OF SEVERE CONVECTION IN ALACHUA AND LEVY COUNTIES. SUPERCELL JUST WEST OF GAINSVILLE MAY TEMPORARILY HAVE A SLIGHT INCREASE IN TORNADO POTENTIAL AS THE STORM INTERACTS WITH THE BOUNDARY. AS THE BOUNDARY MOVES SWWD AND INTERACTS WITH OTHER STORMS...THE THREAT FOR LARGE HAIL AND DAMAGING WINDS WILL BE ENHANCED. ..BROYLES.. 03/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MFL...MLB...TBW...JAX...TAE... 26318218 28708314 30638348 30508110 28248022 26297981 26148179 26388216
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 10:27 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Broward, Charlotte and 39 more | 2 hr |
| Mar 27, 11:00 AM EST | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 34 more | 6 hr |
| Mar 27, 2:15 PM EST | Tornado Watch | SPC | Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach | 5 hr |
| Mar 27, 4:10 PM EST | Mesoscale Discussion | SPC | Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach | 95 min |
Nearby
Mesoscale Discussions in Florida, 2003Every mesoscale discussion in 2003
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.