Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 123, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Sep 1, 2001, 7:15 PM EDT for Lake County, Florida. It was in force for 45 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
- Sep 1, 2001, 7:15 PM EDT (23:15 UTC)
- Expired
- Sep 1, 2001, 8:00 PM EDT
- In force
- 45 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Lake County, FL
The radar
The Melbourne radar (KMLB), 126 km from the middle of the area, began a volume at 23:15 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, 11.3 hours before the alert went out and 123 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
- 1621 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 848 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
907 WUUS52 KMLB 012316 SVRMLB FLC069-020000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 715 PM EDT SAT SEP 1 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN LAKE COUNTY IN EAST CENTRAL FLORIDA * UNTIL 800 PM EDT. * AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES WEST OF PAISLEY...MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL MOVE EAST ACROSS RURAL NORTHERN LAKE 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 2925 8164 2896 8178 2882 8149 2898 8137 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 Sep 1, 2:15 PM EDT, 5 hours earlier.
Area forecast discussion, Sep 1, 2:15 PM EDT, 5 hours before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 215 PM EDT SAT SEP 1 2001 CURRENTLY/TONIGHT...15Z XMR SOUNDING A COMPLETELY DIFFERENT STORY THAN THE 10Z SOUNDING REGARDING MOISTURE...AS PWATS NOW INDICATED AROUND 1.7 INCHES DUE TO A DRY SLOT AT H9-H7. CU FIELD SHOWS THIS SOMEWHAT DRYER AIR RESIDES ACROSS CEN FL...WITH HIGHER MOISTURE AIR N AND S OF CWA. GOOD CONVECTION NOTED ALONG THE WC SEA BREEZE IN THE BIG BEND AREA WHERE HIGHER MOISTURE EXISTS. BOUNDARY COLLISIONS SHOULD STILL GET STUFF GOING OVER CWA...BUT WILL TAKE MORE TIME TODAY...PROBABLY MOSTLY INTO THE EVENING PERIOD. WILL TWEAK EVENING POPS BEFORE ISSUANCE...BUT CURRENT THINKING IS FOR 30-40 POPS NORTH...THEN TRIMMING DOWN TO 20 POPS (OR LESS) SRN COAST WHERE STEERING FLOW IS WEAKER AND SEA BREEZE WILL MOVE INLAND FURTHER. SUNDAY THROUGH LABOR DAY...WEAK H5 HIGH (590 DM) BECOMES CENTERED OVER REGION. LOW PRESSURE SYSTEM WHICH CAUSED TX FLOODING WILL LIFT OVER THE RIDGE INTO THE TN VALLEY. EXPECT SFC RIDGE AXIS WILL REMAIN OVER SRN CWA NEAR LAKE OKEECHOBEE THROUGH THE PERIOD...PER ETA/NGM. AVN IS FARTHER NORTH WITH THE RIDGE AXIS...BUT HAS SHOWN A NORTHWARD BIAS THIS SUMMER WITH THE PLACEMENT OF THE AXIS...SO NOT BUYING IT FOR NOW. NO MAJOR CHANGE EXPECTED IN THE MOISTURE PROFILE THROUGH THE PERIOD...WITH PWATS 1.8-2.0 INCHES. LOW LVL SW FLOW WILL CONTINUE OVER NRN CWA THROUGH MON...ALTHOUGH WEAKER ON MON. SHOULD SEE SCT TSTMS ALONG THE SEA BREEZE BOUNDARIES...ESPECIALLY WHEN EAST/WEST COAST BOUNDARIES CONVERGE OVER THE ERN HALF OF THE PENINSULA. GIVEN THE ABOVE...EXPECT SCT POPS (NEAR CLIMO) THROUGH THE PERIOD...WITH BEST CHCS OVER THE NRN CWA AND LOWEST CHCS SRN COAST AS THE EC SEA BREEZE MOVES INLAND QUICKER TO THE SOUTH. WITH WEAKER STEERING FLOW ON MON...SHOULD SEE LESS MOVEMENT BACK TO THE COAST IN THE EVENING. EXTENDED...S/WV DROPS OUT OF CANADA INTO THE GREAT LAKES REGION. THE PATTERN AMPLIFIES AS AN H5 RIDGE BUILDS INTO THE NRN PLAINS AND THE TROF DEEPENS OVER THE ERN US. THIS WILL ALLOW A COLD FRONT TO DROP SOUTH STALLING OVER GA BY WED. LOOKS LIKE THE BERMUDA SFC RIDGE AXIS NEVER MOVES NORTH. VERY LIGHT WIND FLOW INDICATED DUE TO THE SFC RIDGE BREAKING DOWN AS THE UPR TROF MOVES OVER THE ERN US COAST BY MID WEEK. NO MAJOR WET OR DRY AIR PROGGED TO MOVE INTO THE REGION...THEREFORE NEAR CLIMO POPS/TEMPS EXPECTED AS INDICATED BY MED RANGE GUIDANCE. MARINE...NO HIGHLIGHTS. MAY NEED TO TWEAK WIND DIRECTION IN THE EXTENDED AS MODELS ARE NO LONGER INDICATING THE SFC RIDGE WILL MOVE NORTH. THIS WOULD MEAN THE DEEP ERLY FLOW PREVIOUSLY INDICATED WOULD NOT OCCUR. WOULD RATHER LEAVE EXTENDED ALONE FOR NOW AND SEE IF SOME MODEL CONTINUITY IS ESTABLISHED NEXT FEW RUNS. PRELIMS... DAB TT 073/091 073/090 073 4544 MCO TT 074/093 074/092 074 4545 MLB TT 075/090 075/090 075 2433 88 .MLB...NONE. PUBLIC/MARINE...GITTINGER AVIATION/FIRE WX...CRISTALDI
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.