Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 125, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Aug 7, 1997, 4:00 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 75 min. 2 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
- Aug 7, 1997, 4:00 PM EDT (20:00 UTC)
- Expired
- Aug 7, 1997, 5:15 PM EDT
- In force
- 75 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
Counties Broward County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 88 km from the middle of the area, began a volume at 20:02 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 7, 4:30 PM EDT | Hail 1 | Hollywood, FL | one half to one inch hail around US 1 and sheridan. |
| Aug 7, 4:45 PM EDT | Thunderstorm Wind 55 | Hollywood, FL | power lines down. |
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, 8.0 hours before the alert went out and 66 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
- 2435 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 758 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 072000 RRA SVRMIA FLC011-099-072100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 400 PM EDT THU AUG 7 1997 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION...S... IN SOUTHEAST FLORIDA ...EASTERN BROWARD COUNTY...SOUTHEASTERN PALM BEACH COUNTY AND THE ADJACENT COASTAL WATERS NATIONAL WEATHER SERVICE RADAR INDICATES THUNDERSTORMS BECOMING SEVERE OVER SOUTHEAST PALM BEACH COUNTY STRETCHING INTO EASTERN BROWARD COUNTY. STORMS WILL BE MOVING EAST OVER AREAS NEAR BOYNTON BEACH...TO BOCA RATON...THROUGH POMPANO BEACH TO FT. LAUDERDALE. STORMS WILL PROGRESS OVER ADJACENT ATLANTIC WATERS. DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. 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 |
|---|---|---|---|---|
| Aug 7, 4:45 PM EDT | Severe Thunderstorm Warning | MFL | Miami-Dade | 45 min |
| Aug 7, 5:15 PM EDT | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 45 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1997Every severe thunderstorm warning in 1997
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.