Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 22, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Mar 9, 1998, 2:41 AM EST for Collier County, Florida. It was in force for 59 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
- Mar 9, 1998, 2:41 AM EST (07:41 UTC)
- Expired
- Mar 9, 1998, 3:40 AM EST
- In force
- 59 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Collier County, FL
The radar
The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 07:41 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 |
|---|---|---|---|
| Mar 9, 3:10 AM EST | Tornado F1 | Naples, FL | At 310 est tornado touched down near gordon dr/21st ave and broke a half dozen trees in Port Royal. The tornado skipped across Naples Bay before destroying 10 pool cages in Royal Harbor. the tornado moved through Naples Land-Yacht Harbor destroying 6 and damag |
| Mar 9, 3:50 AM EST | Thunderstorm Wind 65 | Immokalee, FL | At Immokalee Regional Airport one aircraft destroyed and 3 aircraft damaged. A metal building was also damaged. One quarter mile away a feed and supply store reported roof damage. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 9, 1:00 AM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 7.7 hours before the alert went out and 113 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
- 1605 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
056 WUUS1 KMIA 090742 RRA SVRMIA AMZ656-676-FLC021-090840- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 241 AM EST MON MAR 9 1998 THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 340 AM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWESTERN FLORIDA ...WESTERN COLLIER COUNTY INCLUDING ADJACENT COASTAL WATERS AT 233 AM EST... DOPPLER RADAR INDICATED A LINE OF STRONG TO SEVERE THUNDERSTORMS 14 MILES WEST OF NAPLES OR 25 MILES WEST OF MARCO ISLAND MOVING EAST AT 45 MPH. SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE... NAPLES BY ABOUT 255 AM EST MARCO ISLAND BY ABOUT 300 AM EST BELLE MEADE BY ABOUT 300 AM EST GOODLAND BY ABOUT 305 AM EST 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. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. MOVE TO A STRONG BUILDING NOW.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 3:22 AM EST | Severe Thunderstorm Warning | MFL | Collier, Glades, Hendry | 63 min |
| Mar 9, 4:09 AM EST | Severe Thunderstorm Warning | MFL | Palm Beach | 31 min |
| Mar 9, 4:21 AM EST | Severe Thunderstorm Warning | MFL | Collier | 34 min |
| Mar 9, 4:41 AM EST | Severe Thunderstorm Warning | MFL | Palm Beach | 64 min |
| Mar 9, 5:33 AM EST | Tornado Warning | MFL | Broward | 32 min |
| Mar 9, 5:54 AM EST | Tornado Warning | MFL | Miami-Dade | 21 min |
| Mar 9, 6:06 AM EST | Tornado Warning | MFL | Broward | 29 min |
| Mar 9, 6:18 AM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 62 min |
| Mar 9, 7:43 AM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 47 min |
| Mar 9, 8:09 AM EST | Severe Thunderstorm Warning | MFL | Monroe | 91 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.