Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 15, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Feb 6, 1998, 9:35 PM EST for Palm Beach County, Florida. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 6, 1998, 9:35 PM EST (02:35 UTC)
- Expired
- Feb 6, 1998, 10:35 PM EST
- In force
- 60 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Palm Beach County, FL
The radar
The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 02:37 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 6, 9:35 PM EST | Tornado F1 | Delray Beach, FL | Reported by Florida Highway Patrol crossing I95 at Linton BLVD. Uprooted 10 feet in diameter Ficus trees and downed power lines. Tipped over a tractor trailer. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 2.6 hours before the alert went out and 93 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
- 9 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
513 WUUS1 KMIA 070236 RRA SVRMIA FLC099-070405- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 935 PM EST FRI FEB 6 1998 THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1035 PM EST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN FLORIDA ...PALM BEACH COUNTY AT 932 PM EST... DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS OVER THE WESTERN SECTIONS OF PALM BEACH COUNTY. THIS ACTIVITY WILL MOVE NORTHEAST TO EAST AT 35 TO 40 MPH. THIS LINE WILL REACH THE POPULATED AREAS OF EASTERN PALM BEACH COUNTY AFTER 1015 PM. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. SEEK SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 6, 8:34 PM EST | Severe Thunderstorm Warning | MFL | Collier | 76 min |
| Feb 6, 8:43 PM EST | Severe Thunderstorm Warning | MFL | Glades, Hendry | 77 min |
| Feb 6, 9:06 PM EST | Tornado Warning | MFL | Collier | 49 min |
| Feb 6, 10:14 PM EST | Severe Thunderstorm Warning | MFL | Broward | 61 min |
| Feb 6, 10:32 PM EST | Severe Thunderstorm Warning | MFL | Palm Beach | 43 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.