Alert archive / Florida / Mesoscale Discussions in 2003
Mesoscale Discussion 259
The Storm Prediction Center issued this mesoscale discussion at Mar 16, 2003, 11:19 PM EST for 25 counties in Florida. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 16, 2003, 11:19 PM EST (04:19 UTC)
- Expired
- Mar 17, 2003, 2:15 AM EST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Broward County, FL, Charlotte County, FL, Citrus County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Martin County, FL, Monroe County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Pasco County, FL, Polk County, FL, Saint Lucie County, FL, Sumter County, FL
The radar
The Tampa radar (KTBW), 51 km from the middle of the area, began a volume at 04:23 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
Tampa Bay, FL (KTBW), launched 00:00Z, 4.3 hours before the alert went out and 51 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
- 372 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1109 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
761 ACUS11 KWNS 170420 SWOMCD SPC MCD 170419 FLZ000-170715- MESOSCALE DISCUSSION 0259 NWS STORM PREDICTION CENTER NORMAN OK 1019 PM CST SUN MAR 16 2003 AREAS AFFECTED...SRN/CNTRL PENINSULA CONCERNING...CONVECTIVE TRENDS VALID 170419Z - 170715Z ...EXPANSIVE BAND OF THUNDERSTORMS WILL LIFT NEWD ACROSS THE CENTRAL/SRN PENINSULA OVER THE NEXT FEW HOURS... LATE EVENING WATER VAPOR IMAGERY DEPICTS GOOD CONTINUITY OF UPPER SHORTWAVE TROUGH MOVING NEWD ACROSS THE SERN GULF OF MEXICO/WRN FL STRAITS TOWARD THE FL PENINSULA. AN EXPANSIVE AREA OF THUNDERSTORMS HAVE DEVELOPED AHEAD OF THIS FEATURE AND EXTEND JUST OFFSHORE WEST OF CTY...SSEWD TO NEAR KEY...MOVING ENEWD AT ROUGHLY 30 KT. IF CURRENT SPEED/MOVEMENT CONTINUES...LEADING EDGE OF THIS ACTIVITY WILL SHIFT TO THE ERN PENINSULA BY 07-08Z. VERTICAL SHEAR PROFILES ARE JUST STRONG ENOUGH TO SUPPORT ORGANIZED MULTI-CELL CLUSTERS CAPABLE OF PRODUCING BRIEF GUSTY WINDS OR MARGINAL SEVERE HAIL. LONG-LIVED ROTATING UPDRAFTS ARE NOT EXPECTED AND THUS TORNADO POTENTIAL APPEARS MINIMAL. ..DARROW.. 03/17/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MFL...MLB...TBW...JAX...TAE... 29468310 28578083 26338006 25228082 27198240 28828311
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 1:57 PM EST | Mesoscale Discussion | SPC | Charlotte, Citrus, Collier, DeSoto, Dixie, Gilchrist and 17 more | 2 hr |
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.