Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 37, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at May 4, 1998, 6:57 PM EDT for Miami-Dade County, Florida. It was in force for 48 min. 6 reports 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
- May 4, 1998, 6:57 PM EDT (22:57 UTC)
- Expired
- May 4, 1998, 7:45 PM EDT
- In force
- 48 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Miami-Dade County, FL
The radar
The Miami radar (KAMX), 9 km from the middle of the area, began a volume at 23:00 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 |
|---|---|---|---|
| May 4, 7:05 PM EDT | Thunderstorm Wind 60 | Carol City, FL | Tree down at Krome Ave and Okeechobee Rd. |
| May 4, 7:28 PM EDT | Thunderstorm Wind 55 | (Mia)Miami Intl, FL | |
| May 4, 7:40 PM EDT | Hail 0.75 | Cutler Ridge, FL | From Saga Bay...also reported g47 knots and 1.17 inches of rainfall. |
| May 4, 7:44 PM EDT | Hail 1.75 | Perrine, FL | Several trees were downed in the area. |
| May 4, 7:45 PM EDT | Hail 1 | Cutler Ridge, FL | Also reported g50 knots. |
| May 4, 7:45 PM EDT | Hail 2 | South Miami, FL | Hail one to two inches reported by NWS employee at US1 and SW 142nd St. |
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 12:00Z, 11.0 hours before the alert went out and 31 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
- 778 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1145 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
464 WUUS1 KMIA 042258 RRA SVRMIA FLC025-042345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 657 PM EDT MON MAY 4 1998 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN DADE COUNTY IN SOUTHEASTERN FLORIDA * UNTIL 745 PM EDT * AT 659 PM EDT... DOPPLER RADAR AND SPOTTER REPORTS INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHWEST OF KENDALL OR 8 MILES NORTHWEST OF SWEETWATER MOVING SOUTH AT 25 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE... WESTCHESTER BY ABOUT 705 PM EDT KENDALE LAKES BY ABOUT 710 PM EDT KENDALL BY ABOUT 720 PM EDT SOUTH MIAMI HEIGHTS BY ABOUT 730 PM EDT 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. IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 4:22 PM EDT | Severe Thunderstorm Warning | MFL | Glades | 33 min |
| May 4, 7:39 PM EDT | Severe Thunderstorm Warning | MFL | Miami-Dade | 31 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.