Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 120, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 25, 2001, 5:18 PM EDT for Osceola County, Florida. It was in force for 57 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 25, 2001, 5:18 PM EDT (21:18 UTC)
- Expired
- Aug 25, 2001, 6:15 PM EDT
- In force
- 57 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Osceola County, FL
The radar
The Melbourne radar (KMLB), 49 km from the middle of the area, began a volume at 21:19 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 25, 6:00 PM EDT | Thunderstorm Wind 50 E | St Cloud, FL | Thunderstorm winds blew down trees and power lines near St. Cloud. |
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, 9.3 hours before the alert went out and 78 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
401 WUUS52 KMLB 252121 SVRMLB FLC097-252215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 518 PM EDT SAT AUG 25 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OSCEOLA COUNTY IN EAST CENTRAL FLORIDA * UNTIL 615 PM EDT. * AT 515 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR NARCOOSSEE...MOVING SOUTHEAST AT 20 MPH. * IN ADDITION...ANOTHER STRONG TO SEVERE THUNDERSTORM WILL DEVELOP JUST WEST OF HOLOPAW THROUGH 430 PM. 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 2843 8117 2835 8136 2773 8108 2785 8081 MJG
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 25, 1:50 PM EDT, 3 hours 28 minutes earlier.
Area forecast discussion, Aug 25, 1:50 PM EDT, 3 hours 28 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 150 PM EDT SAT AUG 25 2001 CURRENTLY/THIS EVENING...LATE DEVELOPING CUMULUS INDICATE THAT DEEP MOISTURE STILL WAS LACKING. WEAK BOUNDARY EVIDENT JUST NORTH OF THE COASTAL WATERS DROPPING SOUTHWARD. MODELS SHOW THIS BOUNDARY HANGING UP VICINITY OF BIG BEND BUT DROPPING SOUTHWARD OFFSHORE AND ALONG THE COAST. PRECIPITABLE WATER FORECASTS SUGGEST MORE THAN SLIGHT CHANCE MOS POPS...BUT WITH WEAK INSTABILITY WILL PROBABLY JUST GO WITH 20 PERCENT EVERYWHERE. SUNDAY...WEAK SURFACE LOW NORTHEAST OF THE AREA WILL CONTINUE TO PUSH AWAY. WEAK BUBBLE HIGH BUILDING BEHIND IT WILL PROVIDE FOR LIGHT NORTH BECOMING NORTHEAST FLOW. MID/UPPER TROUGH AXIS WILL PUSH EAST SOUTHEAST OF THE AREA WITH MODELS GENERALLY SHOWING SOME DRYING...ETA BEING THE MOST EMPHATIC. THINK THAT BEST LOW LEVEL CONVERGENCE WILL BE OVER THE INTERIOR LATE IN THE AFTERNOON SO WILL CONTINUE THE CURRENT NO POP FORECAST ALONG THE COAST AND SLIGHT CHANCE OVER THE INTERIOR AND SOUTH COAST. MONDAY...TROUGH MOVING TOWARDS THE EASTERN SEABOARD WILL LIFT OUT THE WEAK LOW...WHICH WILL ALLOW LOW LEVEL ATLANTIC RIDGE TO TRY TO BUILD BACK ACROSS THE PENINSULA. ASSOCIATED SURFACE TROUGH WILL NOT ALLOW THIS TO OCCUR WITH MUCH VIGOR HOWEVER. MOISTURE CONTINUES TO LOOK MARGINAL...SO EXPECT THAT INLAND AREAS WILL CONTINUE TO BE THE FAVORED SPOT FOR AFTERNOON STORMS. EXTENDED...LOOKED AT A 2 RUN COMPARISON OF THE MRF AND THINGS SEEMED RATHER SIMILAR. ACTIVE LOW NEAR THE ALEUTIANS CONTINUES TO PUMP OUT SHORTWAVES THAT TRAVERSE THE WEST COAST RIDGE THEN DIG INTO THE EASTERN PART OF THE COUNTRY. THIS WILL KEEP SURFACE RIDGE AXIS FROM PUSHING VERY FAR NORTH OF THE AREA. THERE MAY BE A BRIEF WINDOW WHERE SOUTHERN COASTAL SECTIONS HAVE SOME ATLANTIC SHOWERS MOVE ASHORE OVERNIGHT...OTHERWISE CONVECTION SHOULD FAVOR THE DAYTIME. BUILDING 500 MB RIDGE ACROSS THE AREA MAY CONTINUE THE BELOW NORMAL RAINFALL TREND MUCH OF NEXT WEEK. MARINE...NOT A LOT GOING ON RIGHT NOW OVER THE WATERS...AS THEY TOO WERE QUITE FREE OF CLOUDS. BOUNDARY WILL BE PUSHING ACROSS THE NORTH LEG THE REST OF THE AFTERNOON AND INTO SOUTHERN SECTIONS DURING THE EVENING. MODELS NOT SHOWING ANYTHING OVER 10 KNOTS THROUGH SUNDAY ...EXCEPT FOR THE AVN. THEREAFTER...HIGH PRESSURE RIDGE WILL GRADUALLY BECOME ESTABLISHED ACROSS THE SOUTHERN PENINSULA MONDAY...THEN BUILD TO THE CENTRAL PENINSULA TUESDAY...AND POSSIBLY JUST NORTH OF THE WATERS BY THURSDAY. PROXIMITY OF THIS RIDGE SUGGESTS 10 KNOT OR LESS FLOW. LATEST WAVE WATCH MODEL SHOWING INCREASED SEAS SUNDAY DUE TO NORTHEAST SWELLS...WHICH THEN DAMPEN OUT QUICKLY EARLY NEXT WEEK. DAB UB 070/089 070/090 071 1112 MCO BB 071/093 071/093 073 1213 MLB UB 072/089 072/089 073 1112 .MLB...NONE. PUBLIC/MARINE...LASCODY AVIATION/FIRE WX...WIMMER
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 4:57 PM EDT | Severe Thunderstorm Warning | MLB | Orange | 63 min |
| Aug 25, 6:35 PM EDT | Severe Thunderstorm Warning | MLB | Indian River | 40 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.