Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 149, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Nov 2, 1997, 9:46 AM EST for Hendry County, Florida. It was in force for 59 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
- Nov 2, 1997, 9:46 AM EST (14:46 UTC)
- Expired
- Nov 2, 1997, 10:45 AM EST
- In force
- 59 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Hendry County, FL
The radar
The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 14:49 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 |
|---|---|---|---|
| Nov 2, 7:30 AM EST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 2.8 hours before the alert went out and 120 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
- 1853 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 788 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 021450 RRA SVRMIA FLC051-021545- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 946 AM EST SUN NOV 2 1997 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 AM EST FOR PEOPLE IN THE FOLLOWING LOCATION...... IN SOUTH FLORIDA ...CENTRAL AND EASTERN HENDRY COUNTY A LINE OF VERY STRONG THUNDERSTORMS... A FEW SEVERE... EXTENDED FROM LAKE OKEECHOBEE ACROSS EASTERN GLADES AND CENTRAL HENDRY COUNTIES INTO COLLIER. THE LINE WAS MOVING SOUTH SOUTHEAST AT 10 TO 15 MPH WHILE INDIVIDUAL THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 40 TO 45 MPH. THE SEVERE THUNDERSTORM WARNING IS NOW IN EFFECT FOR CENTRAL AND EASTERN HENDRY COUNTY AND REPLACES THE EARLIER WARNING ISSUED FOR WESTERN HENDRY COUNTY. DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK SHELTER INR A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Nov 2, 6:00 AM EST, 3 hours 46 minutes before
FLZ063-066>078-502>504-022300- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 600 AM EST SUN NOV 2 1997 A COLD FRONT WILL BE MOVING SOUTHWARD THROUGH CENTRAL FLORIDA TODAY. AHEAD OF THE FRONT MODERATE SOUTHWEST WINDS WILL KEEP CONDITIONS RATHER MOIST AND UNSTABLE ACROSS SOUTH FLORIDA TODAY. THUNDERSTORMS ARE EXPECTED TO SPREAD OVER THE NORTHERN PART OF THE AREA LATER THIS MORNING AND CONTINUE SOUTHEASTWARD REACHING MOST AREAS ELSEWHERE BY EARLY AFTERNOON. THERE IS THE POSSIBILITY THAT ISOLATED THUNDERSTORMS MIGHT BECOME SEVERE PRODUCING STRONG WINDS AND DANGEROUS LIGHTNING. THESE WILL BE THE PRIMARY WEATHER HAZARDS. WINDY CONDITIONS CAN BE EXPECTED IN MANY AREAS ESPECIALLY ALONG THE WEST COAST WHERE SOUTHWEST WINDS WILL BLOW AT AROUND 20 MPH.
Special weather statement, Nov 2, 6:15 AM EST, 3 hours 31 minutes before
FLZ063-066>078-502>504-022300- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 600 AM EST SUN NOV 2 1997 A COLD FRONT WILL BE MOVING SOUTHWARD THROUGH CENTRAL FLORIDA TODAY. AHEAD OF THE FRONT MODERATE SOUTHWEST WINDS WILL KEEP CONDITIONS RATHER MOIST AND UNSTABLE ACROSS SOUTH FLORIDA TODAY. THUNDERSTORMS ARE EXPECTED TO SPREAD OVER THE NORTHERN PART OF THE AREA LATER THIS MORNING AND CONTINUE SOUTHEASTWARD REACHING MOST AREAS ELSEWHERE BY EARLY AFTERNOON. THERE IS THE POSSIBILITY THAT ISOLATED THUNDERSTORMS MIGHT BECOME SEVERE PRODUCING STRONG WINDS AND DANGEROUS LIGHTNING. THESE WILL BE THE PRIMARY WEATHER HAZARDS. WINDY CONDITIONS CAN BE EXPECTED IN MANY AREAS ESPECIALLY ALONG THE WEST COAST WHERE SOUTHWEST WINDS WILL BLOW AT AROUND 20 MPH.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 2, 8:52 AM EST | Severe Thunderstorm Warning | MFL | Glades | 68 min |
| Nov 2, 9:06 AM EST | Severe Thunderstorm Warning | MFL | Hendry | 69 min |
| Nov 2, 9:20 AM EST | Severe Thunderstorm Warning | MFL | Glades | 55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.