Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 39, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at May 5, 1998, 3:57 PM EDT for Palm Beach County, Florida. It was in force for 68 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
- May 5, 1998, 3:57 PM EDT (19:57 UTC)
- Expired
- May 5, 1998, 5:05 PM EDT
- In force
- 68 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 19:58 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 5, 11:30 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 8.0 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
- 323 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1647 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
693 WUUS1 KMIA 051958 RRA SVRMIA FLC099-052105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 357 PM EDT TUE MAY 5 1998 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWEST PALM BEACH COUNTY IN SOUTHEASTERN FLORIDA * UNTIL 505 PM EDT * AT 350 PM EDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 29 MILES NORTHWEST OF TWENTYMILE BEND OR 9 MILES NORTH OF SAND CUT MOVING SOUTHEAST AT 20 MPH. THIS STORM WILL MOVE ALONG THE EASTERN SHORE OF LAKE OKEECHOBEE AND INTO NORTHWEST PALM BEACH COUNTY. BOATERS IN LAKE OKEECHOBEE AND INTERESTS IN WEST PALM BEACH COUNTY SHOULD BE ALERT FOR STRONG GUSTY WINDS...HEAVY RAINS...AND LARGE HAIL. * A LOCATION NEAR THE PATH OF THIS STORM IS... SAND CUT BY ABOUT 400 PM EDT THUNDERSTORMS THREATEN BOATER SAFETY WITH GUSTY WINDS IN EXCESS OF 35 KNOTS...ROUGH SEAS...AND DEADLY LIGHTNING. YOUR BEST COURSE OF ACTION IS TO SEEK SAFE HARBOR...BUT IF YOU ARE CAUGHT ON THE OPEN WATER...STAY BELOW DECK OR KEEP A LOW PROFILE AND KEEP AWAY FROM UNGROUNDED METAL OBJECTS. ALL SHOULD WEAR FLOTATION DEVICES. 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 |
|---|---|---|---|---|
| May 5, 4:22 PM EDT | Severe Thunderstorm Warning | MFL | Broward, Palm Beach | 48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.