Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 110, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 18, 2001, 4:57 PM EDT for Orange County, Florida. It was in force for 63 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 18, 2001, 4:57 PM EDT (20:57 UTC)
- Expired
- Aug 18, 2001, 6:00 PM EDT
- In force
- 63 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Orange County, FL
The radar
The Melbourne radar (KMLB), 79 km from the middle of the area, began a volume at 20:57 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 18, 5:30 PM EDT | Thunderstorm Wind 60 E | Orlando, FL | Thunderstorm winds blew down trees that heavily damaged three cars and the roof of a house. |
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, 9.0 hours before the alert went out and 81 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
- 1928 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
320 WUUS52 KMLB 182057 SVRMLB FLC095-182200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 457 PM EDT SAT AUG 18 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ORANGE COUNTY IN EAST CENTRAL FLORIDA * UNTIL 600 PM EDT. * AT 455 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER ORLOVISTA...OR ABOUT 3 MILES SOUTH OF PINE HILLS...MOVING LITTLE. * THIS STORM WILL BE AFFECTING AREAS AROUND DOWNTOWN ORLANDO. OTHER STORMS WERE DEVELOPING RAPDILY ACROSS ORANGE COUNTY AND COULD ALSO BECOME SEVERE. 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 2865 8144 2853 8159 2836 8135 2842 8111 RL
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 18, 2:45 PM EDT, 2 hours 12 minutes earlier.
Area forecast discussion, Aug 18, 2:45 PM EDT, 2 hours 12 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 245 PM EDT SAT AUG 18 2001 CURRENTLY...BOTH ATLANTIC AND GULF BREEZES HAVE DEVELOPED AND ARE MOVING INLAND...QUITE UNDISTURBED BY CONVECTION. THIS SHOULD LEAD TO MORE OR LESS A TRUE SEA BREEZE COLLISION OVER THE INTERIOR COUNTIES...NEAR THE ORLANDO METRO AREA OR JUST EAST...LATER THIS AFTN/EVE. SOME OF THE RESULTING STORMS WILL BE STRONG. UNTIL THEN... OTHER STORMS...SOME STRONG...WILL DEVELOP AS THE EAST COAST BREEZE INTERACTS WITH THE LAKE OKEECHOBEE BREEZE (SEEN ON VIS SAT IMAGERY) AND OTHER LAKE BOUNDARIES. UPPER TROUGH DEEPENS OVER EASTERN U.S. AND SFC FRONT DROPS INTO THE DEEP SOUTH DURING THE NEXT 48 HOURS. THIS WILL INCREASE THE SW GRADIENT FLOW SUN...ESP NORTH HALF...ALLOWING STORMS TO MOVE BACK TO THE COAST LATE IN THE DAY. AS A RESULT...ALTHOUGH EAST COAST BREEZE WILL DEVELOP SUNDAY...IT WILL BE HELD CLOSER TO THE COAST THAN TODAY ESP VOLUSIA COUNTY. WILL CONTINUE 50 POP NORTH COAST FOR LATE ACTIVITY. 12Z AVN BRINGS A BAND OF DRIER AIR/SUBSIDENCE NORTH INTO OUR SOUTHERN ZONES SUN AFT. THIS LOOKS REASONABLE LOOKING AT CURRENT WATER VAPOR IMAGERY AND SPEED OF SYSTEM. EXTENT OF DRYING MAY BE MORE OR LESS DEPENDING ON STRENGTH OF CHANTAL. SO WILL GO WITH JUST 30 POPS SOUTHERN ZONES SUN. CHANTAL IS PROGGED TO STAY WELL SOUTH AND WEST OF THE FORECAST AREA. HOWEVER...ETA AND AVN BRING DEEP MOISTURE NORTH ACROSS THE SOUTHERN HALF OF THE PENINSULA MON. AGAIN...EXTENT OF MOISTURE ADVECTION WILL DEPEND ON STRENGTH OF THE SYSTEM. BUT MODEL RUN TO RUN CONSISTENCY HAS INCREASED OUR CONFIDENCE THAT HIGHER POPS ARE IN ORDER MON FOR SOUTHERN ZONES (50%)...BUT BAND OF SUBSIDENCE MOVING UP THE PENINSULA SHOULD KEEP POPS LOWER ELSEWHERE. EXTENDED FORECAST IS HIGHLY DEPENDENT ON TRACK AND INTENSITY OF CHANTAL. MOST MODELS (NOGAPS, UKMET, GFDL) ARE IN AGREEMENT WITH BRINGING THE SYSTEM INTO THE WESTERN GULF OF MEXICO EARLY NEXT WEEK...BUT MRF/AVN ARE DECIDEDLY MORE EASTWARD AND PULLING DEEP MOISTURE OVER THE PENINSULA TUE AND WED. WILL CONTINUE TO DISCOUNT THIS SOLUTION FOR NOW...AND KEEP SCT POPS IN THE EXTENDED. MARINE...A FEW STORMS MAY MOVE OFF THE PENINSULA THIS EVENING NORTH OF THE CAPE...WITH A BETTER CHANCE SUN. MORE WIDESPREAD CONVECTION MAY DEVELOP NORTHWARD INTO THE SOUTHERN WATERS MON. SEAS TO REMAIN PRETTY FLAT WITH PRIMARILY A SMALL EAST SWELL. PRELIM... DAB BB 075/094 074/092 073 3534 MCO BB 075/093 075/092 075 3424 MLB BB 076/091 076/090 075 -524 .MLB...NONE. PUBLIC/MARINE...KELLY AVIATION/FIRE WX...BRAGAW
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 5:16 PM EDT | Severe Thunderstorm Warning | MLB | Volusia | 44 min |
| Aug 18, 5:23 PM EDT | Severe Thunderstorm Warning | MLB | Seminole | 37 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.