Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 11, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Feb 2, 1998, 8:52 PM EST for Palm Beach County, Florida. It was in force for 63 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
- Feb 2, 1998, 8:52 PM EST (01:52 UTC)
- Expired
- Feb 2, 1998, 9:55 PM EST
- In force
- 63 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 01:54 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 |
|---|---|---|---|
| Feb 2, 8:00 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 00:00Z, 1.9 hours before the alert went out and 203 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
- 42 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 317 m²/s²
- 0-3 km storm-relative helicity
- 448 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
850 WUUS1 KMIA 030154 RRA SVRMIA AMZ610-650-670-FLC099-030255- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 852 PM EST MON FEB 2 1998 THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 955 PM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEASTERN FLORIDA ...PALM BEACH COUNTY INCLUDING ADJACENT COASTAL WATERS AT 850 PM EST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM MOVING INTO SOUTHEAST PALM BEACH COUNTY FROM BROWARD COUNTY. OTHER THUNDERSTORMS CONTINUE OVER CENTRAL AND EASTERN BROWARD COUNTY AND WILL MOVE NORTH NORTHEAST AT 40 MPH INTO EASTERN PALM BEACH COUNTY. 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. 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.
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, Feb 2, 8:37 PM EST, 15 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-031100- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 830 PM EST MON FEB 3 1998 ...TORNADO WATCH IN EFFECT UNTIL 200 AM... ...GALE WARNING TONIGHT... ...FLOOD WATCH TONIGHT... ...WIND ADVISORY TONIGHT... GALE WARNINGS ARE IN EFFECT FOR THE COASTAL WATERS OF SOUTH FLORIDA AND A WIND ADVISORY IS IN EFFECT FOR THE MAINLAND AND THE KEYS. SOUTHEAST WINDS OF 30 TO 40 KTS OVER THE WATER AND 25 TO 30 MPH WITH HIGHER GUSTS OVER THE MAINLAND AND THE KEYS WILL CONTINUE TONIGHT. MOTORISTS...ESPECIALLY THOSE DRIVING HIGH WIND PROFILE VEHICLES ARE ADVISED TO DRIVE WITH EXTRA CARE DUE TO STRONG WIND GUSTS. HIGHER THAN NORMAL TIDE CONDITIONS ARE ALSO EXPECTED WITH MINOR COASTAL FLOODING POSSIBLE ACROSS THE KEYS DURING THE TIME OF HIGH TIDE. THE WINDS ARE THE RESULT OF A DEEPENING LOW PRESSURE IN THE CENTRAL GULF OF MEXICO. SHOWERS AND POSSIBLY SEVERE THUNDERpSTORMS WILL CONTINUE TO DEVELOP OVER SOUTH FLORIDA TONIGHT. THESE STORMS WILL BRING PERIODS OF HEAVY RAIN...STRONG WIND GUSTS AND POSSIBLE TORADOES.
Local storm report, Feb 2, 8:45 PM EST, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
845 PM EST MON FEB 2 1998
TIMEEST .....CITY LOCATION..... STATE ...EVENT/REMARKS...
5PM - 6AM BOYNTON BEACH -PALM BEACH FL 1.50 INCHES LAST 30 MINS.
SOME FLOODING EARLIER.
8:30PM-7AM PBI INTL. APT.-PALM BEACH FL 8.17 INCHES OF RAIN.
322 PM BOCA RATON FL FUNNEL CLOUD.
340 PM DUCK KEY -MONROE FL WIND GUSTING TO 65 KTS.
430 PM BIG PINE KEY FL TWO DOWNED TREES ON HOUSE
DUE TO HEAVY WINDS.
525 PM CONCH KEY FL WIND GUSTING TO 71 KTS.
540 PM DUCK KEY FL SUSTAINED WIND 50 KTS.
545 PM DUCK KEY FL SUSTAINED WIND 65G80 MPH.
550 PM DUCK KEY FL WIND 60G85 KTS.
615 PM CONCH KEY FL WIND 36G46 KTS.
635 PM MARCO ISLAND -COLLIER FL POSSIBLE FUNNEL CLOUD.
645 PM MARATHON -MONROE FL GOLF BALL SIZE HAIL.
TREES DOWN.
710 PM CONCH KEY -MONROE FL TORNADO ON GROUND.
DAMAGE TO FIREHOUSE.
715 PM GRASSY KEY -MONROE FL MANGROVE TREES UPROOTED.
POWER POLES DOWN.
715 PM GRASSY KEY -MONROE FL 700PM TORNADO TORE ROOF OF HOUSE.
715 PM RESORT AT MARATHON -MONROE FL TORNADO ON GROUND.
INJURIES REPORTED.
730 PM VIRGINIA KEY -MIAMI-DADE FL WIND GUSTS 40-50 MPH.
POWER OUT FOR 2 HRS AT
VIRGINIA KEY AND KEY BISCAYNE.
730 PM PALMETTO XPRESSWAY
AND MILLER ROAD -MIAMI-DADE FL UNCONFIRMED TORNADO.
815 PM 10 MILES SOUTH OF MIAMI FL WIND GUST TO 70 MPH.
835 PM HOLLYWOOD -BROWARD FL WIND GUST TO 90 KTS.
840 PM OPA LOCKA APT -MIAMI-DADE FL TORNADO TOUCHDOWN.
900 PM BROWARD COUNTY FL MAJOR STREET FLOODING.
POWER OUTAGES AT DANIA
AND PEMBROKE PINES.
905 PM BROWARD COUNTY FL SMALL HAIL AT CORAL SPRINGS.The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 7:02 PM EST | Severe Thunderstorm Warning | MFL | Monroe | 58 min |
| Feb 2, 7:18 PM EST | Tornado Warning | MFL | Miami-Dade | 52 min |
| Feb 2, 7:23 PM EST | Tornado Warning | MFL | Monroe | 62 min |
| Feb 2, 7:34 PM EST | Tornado Warning | MFL | Miami-Dade | 61 min |
| Feb 2, 8:12 PM EST | Severe Thunderstorm Warning | MFL | Broward | 63 min |
| Feb 2, 8:29 PM EST | Tornado Warning | MFL | Broward, Miami-Dade | 61 min |
| Feb 2, 8:31 PM EST | Severe Thunderstorm Warning | MFL | Monroe | 59 min |
| Feb 2, 10:18 PM EST | Tornado Warning | MFL | Palm Beach | 62 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.