Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 118, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 21, 2001, 6:46 PM EDT for Indian River County, Saint Lucie 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
- Aug 21, 2001, 6:46 PM EDT (22:46 UTC)
- Expired
- Aug 21, 2001, 7:45 PM EDT
- In force
- 59 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
The radar
The Melbourne radar (KMLB), 65 km from the middle of the area, began a volume at 22:48 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 nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 10.8 hours before the alert went out and 104 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
- 2741 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
317 WUUS52 KMLB 212247 SVRMLB FLC061-111-212345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 646 PM EDT TUE AUG 21 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN INDIAN RIVER COUNTY NORTHEASTERN ST. LUCIE COUNTY IN EAST CENTRAL FLORIDA * UNTIL 745 PM EDT. * AT 638 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHWEST OF VERO BEACH...MOVING SOUTHEAST AT 10 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. EXCESSIVE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. $$ LAT...LON 2760 8053 2745 8043 2738 8030 2762 8034
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.
NWS Melbourne, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 2:25 PM EDT, 4 hours 21 minutes earlier.
Area forecast discussion, Aug 21, 2:25 PM EDT, 4 hours 21 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 225 PM EDT TUE AUG 21 2001 CURRENTLY...SCATTERED STRONG LIGHTNING STORMS WERE MOVING EAST AS A SURFACE BOUNDARY FROM LEESBURG TO DAYTONA BEACH WAS HELPING TO INITIATE ACTIVITY. ADDITIONAL STRONG STORMS CAN BE EXPECTED TO DEVELOP SOUTH AND EASTWARD OVER THE REGION INTO EVENING. TONIGHT/WED...CU FIELD NORTH OF THE AREA ALREADY SHOWING SIGNS OF DRYING WITH SFC DEWPOINTS IN THE LOW 70S SOUTH TO GNV. FEEL POPS WILL DIMINISH FAIRLY QUICKLY AFTER SUNSET WITH CESSATION OF SFC HEATING. WILL TEMPER NOS BACK TO SLIGHT CHANCE OVER N HALF WITH 30 OVER SOUTH IN HIGHER MOISTURE. A WEAK FRONTAL TROUGH MOVES OVER N FL WITH DRYING TREND BY SUNRISE OVER MOST OF THE AREA. SUBSIDENCE AS WITH ADVANCING HIGH PRESSURE FROM THE SOUTHEAST IS MORE RAPIDLY ADVERTISED BY ETA. AVN NOT AS QUICK TO DRY OUT AIRMASS...ESPECIALLY OVER THE SOUTH DURING WED AND WITH THESE DISCREPANCIES NOTED WILL KEEP POPS IN LOW SCT CATEGORY OVER THE SOUTHERN COUNTIES. GRADIENT ONSHORE FLOW DEVELOPS BY AFTERNOON WITH DRY ADVECTION IN NE FLOW. CHICKEN POPS AT BEST OVER NORTHERN SECTIONS. THU/FRI...AIRMASS MOISTURE RECOVERY IS LIMITED THROUGH THE REMAINDER OF THE WORK WEEK. WILL KEEP RAIN CHANCES LOWER UNTIL PWATS RISE WITH RETURN OF SOUTHERLY WIND COMPONENT. MIXED SIGNALS WRT TO FALLING HEIGHTS OFF THE FL EAST COAST MAY HELP POP NOS TO RISE TO HIGHER CATEGORIES SHOULD TROPICAL WAVE EAST OF BAHAMAS SHOW CLOSER INFLUENCE BY THIS WEEKEND. EXTENDED...SUBTROPICAL RIDGE SUPPRESSED OVER THE BAHAMAS TO FL STRAITS EARLY NEXT WEEK WITH LOWER HEIGHTS OVER THE CONTINENTAL SE. FAVORABLE STEERING ENVIRONMENT FOR AFTERNOON AND EVENING STORM COVERAGE....ALTHOUGH DEEP MOISTURE REMAINS IN QUESTION. MARINE...NO GRADIENT WIND SURGES SEEN IN IMMEDIATE FUTURE BEYOND LOCAL SQUALLS IN VICINITY OF STORMS MOVING OFF SHORE THROUGH THIS EVENING. PRELIM... DAB BB 072/089 072/089 072 3212 MCO BB 074/092 073/092 073 3212 MLB BB 075/089 074/089 075 3322 44 .MLB...NONE. PUBLIC/MARINE...PENDERGRAST AVIATION/FIRE WX...GITTINGER
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 4:50 PM EDT | Severe Thunderstorm Warning | MLB | Brevard | 55 min |
| Aug 21, 4:52 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 53 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2001Every severe thunderstorm warning in 2001
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.