Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 122, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 30, 2001, 6:35 PM EDT for Seminole County, Volusia County, Florida. It was in force for 40 min. 1 report 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 30, 2001, 6:35 PM EDT (22:35 UTC)
- Expired
- Aug 30, 2001, 7:15 PM EDT
- In force
- 40 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
Counties Seminole County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 101 km from the middle of the area, began a volume at 22:39 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 30, 6:45 PM EDT | Hail 0.75 | De Bary, FL |
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
Cape Canaveral, FL (KXMR), launched 12:00Z, 10.6 hours before the alert went out and 82 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
- 1695 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
228 WUUS52 KMLB 302236 SVRMLB FLC117-127-302315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 635 PM EDT THU AUG 30 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN SEMINOLE COUNTY SOUTHWEST VOLUSIA COUNTY IN EAST CENTRAL FLORIDA * UNTIL 715 PM EDT. * AT 629 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER DE BARY...OR ABOUT 4 MILES NORTHWEST OF LAKE MONROE...MOVING NORTHEAST AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR ORANGE CITY AT 705 PM EDT OTHER STRONG TO SEVERE THUNDERSTORMS ARE DEVELOPING SOUTH INTO WESTERN SEMINOLE COUNTY. 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. $$ LAT...LON 2864 8145 2864 8133 2895 8119 2902 8135 28
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 30, 2:25 PM EDT, 4 hours 10 minutes earlier.
Area forecast discussion, Aug 30, 2:25 PM EDT, 4 hours 10 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 225 PM EDT THU AUG 30 2001 CURRENTLY/TONIGHT...A FEW CELLS FORMING OVER INTERIOR SECTIONS PRESENTLY. EAST COAST SEA BREEZE STARTING TO DRIFT INLAND. COVERAGE OF SHOWERS/STORMS SHOULD BE HIGHEST LATE AFTERNOON AND THIS EVENING OVER THE NORTHERN INTERIOR SECTIONS WITH EAST/WEST COAST SEA BREEZE MERGERS. WILL GO HIGHEST WITH SCATTERED EVENING POPS THOSE LOCATIONS. WILL KEEP FORECAST DRY SOUTHERN COASTAL ZONES WHERE SEA BREEZE WILL BE WELL INLAND AND GENERAL STORM DRIFT WILL BE SLOW TO THE NNW. THIS WILL ALLOW THE STORMS THAT DO FORM TO GIVE A HEALTHY DOUSING OF RAIN TO THE LOCATIONS THEY DRIFT OVER. FRI THROUGH SAT...APPROACH OF FRONTAL TROUGH INTO SE U.S. WILL BEGIN TO SUPPRESS LOW LEVEL RIDGE THAT IS OVER THE CENTRAL PENINSULA TODAY SOUTHWARD FRIDAY INTO SATURDAY. AS THIS OCCURS...SWLY WIND COMPONENT WILL EXTEND THROUGH STEERING LEVELS. AFTERNOON CONVECTION THAT DEVELOPS OVER THE INTERIOR AS THE SEA BREEZES COLLIDE WILL BEGIN TO MOVE BACK TOWARD THE EAST COAST IN THE EVENINGS THROUGH ROUGHLY NORTHERN HALF OF THE CWA...WHILE SOUTHERN COASTAL SECTIONS SHOULD REMAIN DRY IN THE EVENINGS. WILL HAVE SCATTERED POPS IN BOTH DAY/EVE NORTHERN AND INTERIOR BUT WITH COLLISIONS OCCURRING LATE AFTERNOON WILL HAVE TO DECIDE WHETHER ONE PERIOD SHOULD BE HIGHER THAN THE OTHER. SEA BREEZE ONSET WILL OCCUR A LITTLE LATER TO THE NORTH ALTHOUGH LOW LEVEL FLOW NOT STRONG ENOUGH TO INHIBIT DEVELOPMENT OF THE SEA BREEZE ALTOGETHER. EXTENDED...END OF LATEST AVN RUN INDICATES FRONTAL BOUNDARY WILL DIMINISH NEAR FL/GA BORDER LATE IN THE WEEKEND BUT RIDGE AXIS WILL REMAIN ACROSS SOUTHERN PENINSULA THROUGH EARLY NEXT WEEK. THIS WILL CONTINUE TO MAKE IT FAVORABLE FOR AFTERNOON CONVECTION TO DRIFT TOWARD THE EAST COAST...ESPECIALLY NORTHERN SECTIONS. WILL KEEP SCATTERED POPS THROUGH EXTENDED. MARINE...AS RIDGE AXIS SLIPS SOUTH OVER THE NEXT COUPLE OF DAYS... WINDS WILL BECOME SWLY OVER NORTHERN LEG BUT WINDS NEAR THE COAST WILL BECOME ONSHORE DURING THE AFTERNOONS. STORMS WILL ALSO BEGIN TO MOVE ACROSS EAST COAST OVER NORTHERN LEG DURING THE EVENINGS. PRELIM NUMBERS... DAB BB 072/091 072/092 072 143 MCO BB 073/093 073/093 073 344 MLB BB 075/089 075/090 075 031 .MLB...NONE. PUBLIC/MARINE...GLITTO AVIATION/FIRE WX...GITTINGER
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.