Alert archive / Florida / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 74
The Storm Prediction Center issued this severe thunderstorm watch at Mar 1, 1998, 12:00 AM EST for 7 counties in Florida. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 1, 1998, 12:00 AM EST (05:00 UTC)
- Expired
- Mar 1, 1998, 4:00 AM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
Counties Brevard County, FL, Indian River County, FL, Martin County, FL, Okeechobee County, FL, Osceola County, FL, Palm Beach County, FL, Saint Lucie County, FL
The radar
The Melbourne radar (KMLB), 39 km from the middle of the area, began a volume at 05:02 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, 5.0 hours before the alert went out and 167 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
- 1852 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 516 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 3.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 8:30 PM EST | Tornado Watch | SPC | Charlotte, Citrus, Collier, DeSoto, Glades, Hardee and 11 more | 6 hr |
| Mar 1, 3:15 AM EST | Tornado Watch | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 20 more | 6 hr |
| Mar 1, 9:00 AM EST | Severe Thunderstorm Watch | SPC | Broward, Collier, Glades, Hendry, Martin, Miami-Dade and 3 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Florida, 1998Every severe thunderstorm watch in 1998
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.