Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 102, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jul 13, 1999, 5:14 PM EDT for Orange County, Florida. It was in force for 61 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
- Jul 13, 1999, 5:14 PM EDT (21:14 UTC)
- Expired
- Jul 13, 1999, 6:15 PM EDT
- In force
- 61 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 21:16 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
Jacksonville, FL (KJAX), launched 12:00Z, 9.2 hours before the alert went out and 224 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
- 5 J/kg
- Mixed-layer CIN
- -183 J/kg
- Mixed-layer LCL
- 1336 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Jul 13, 2:30 PM EDT, 2 hours 44 minutes earlier.
Area forecast discussion, Jul 13, 2:30 PM EDT, 2 hours 44 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 230 PM EDT TUE JUL 13 1999 PRECIPITATION GETTING OFF TO A LATE START THIS AFTERNOON WITH BULK OF CONVECTION YET TO OCCUR. SEA BREEZE MERGER OVER CENTRAL FL WILL SIGNAL A FEW STRONG STORMS LATER THIS AFTERNOON. SUBSIDENCE AND DRY AIR OVER THE IMMEDIATE ATLANTIC WATERS WILL MOVE ASHORE IN THE WAKE OF THE SEABREEZE ...CLEARING COASTAL COUNTIES SOUTH OF VOLUSIA FROM ANY PRECIPITATION THE REST OF TODAY. TONIGHT...SYNOPTIC LOW LEVEL WINDS TO BECOME MORE SLY AS HIGH PRESSURE RIDGE OVER THE STATE BROADENS. AFTER DISSIPATION OF EVENING DEBRIS CLOUDS...OVERALL HIGH CLOUD COVERAGE SHOULD BE SPARSE. POCKETS OF GROUND FOG LIKELY AGAIN BY SUNRISE AS WINDS AREA WIDE DROP TO NEAR CALM BY MIDNIGHT. WEDNESDAY-THURSDAY NIGHT...DEEP LAYER RIDGE AXIS RETREATS NORTHWARD...REACHING S GA THURSDAY. LOW-MID LEVEL FLOW AROUND BROAD RIDGE WILL RESULT IN GENERAL SOUTHERLY STEERING WINDS WED AFTERNOON. THUS...BOTH EAST AND WEST COAST BOUNDARIES SHOULD BE SLOW TO MOVE INLAND. POSITION OF RIDGE AXIS SHOULD STILL ALLOW GREATEST INLAND PENETRATION BY WEST COAST BREEZE AND ASSOCIATED CONVECTIVE OUTFLOWS NORTH OF MCO-TTS BY LATE IN THE DAY. ALTHOUGH MOISTURE DEPTH WILL INCH UPWARD...EXPECT LESS CONVERGENCE BETWEEN BREEZE BOUNDARIES THAN RECENT DAYS AND THUS ONLY SCATTERED COVERAGE OF STORMS. DEEPENING E/SE FLOW WILL RETURN THU. EXPECT CONTINUED SCATTERED COVERAGE OF STORMS ALTHOUGH DISTRIBUTION WILL FAVOR INTERIOR COUNTIES DURING THE EARLY-MID AFTERNOON THEN AFFECTING TBW CWA BY SUNSET. TEMPS CLOSE TO NORMAL. FRIDAY-SUNDAY...WILL RIDGE AXIS REMAINING WELL TO THE NORTH...DEEP E/SE FLOW WILL PREVAIL. LACK OF PRONOUCED MOISTURE SOURCES/DISTURBANCES UPSTREAM OVER ATLANTIC/CARRIB SHOULD HOLD PRECIP CHANCES NEAR/BELOW CLIMO. GIVEN FLOW REGIME...EXPECT SOME SHOWERS/STORMS THROUGH EARLY AFTERNOON OVER COASTAL COUNTIES...WITH HIGHEST COVERAGE INLAND DURING THE EARLY-MID AFTERNOON. DONT EXPECT GRADIENT FLOW TO BE STRONG ENOUGH TO WARRANT NOCTURAL RAIN CHANCES AT THIS TIME. TEMPS NEAR CLIMO. MARINE...NO HIGHLIGHTS. AFTER ONE MORE DAY OF WEAK SOUTHERLY GRADIENT WITH PM SEA BREEZES...TRANSITION TO E/SE FLOW WILL OCCUR. SCATTERED SHOWERS/STORMS OVER PENINSULA MAY AFFECT NEAR SHORE WATERS N OF MLB THROUGH MID EVENING TONIGHT. DAB TB 074/090 073/090 073 65353 MCO TB 072/092 073/092 072 65353 MLB BB 071/090 074/089 075 65143 .MLB...NONE. PENDERGRAST/SPRATT
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:06 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 49 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999
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.