Alert archive / Florida / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 68, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jun 17, 2011, 4:45 PM EDT for Osceola County, Florida. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 17, 2011, 4:45 PM EDT (20:45 UTC)
- Expired
- Jun 17, 2011, 5:29 PM EDT
- In force
- 44 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
County Osceola County, FL
The radar
The Melbourne radar (KMLB), 45 km from the middle of the area, began a volume at 20:46 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 |
|---|---|---|---|
| Jun 17, 4:45 PM EDT | HAIL 1 | 1 Se Holopaw, FL | SPOTTER REPORTED QUARTER-SIZED HAIL ON MERCURY DRIVE IN HOLOPAW. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 8.8 hours before the alert went out and 67 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
- 587 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
745 WUUS52 KMLB 172045 SVRMLB FLC097-172145- /O.NEW.KMLB.SV.W.0068.110617T2045Z-110617T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 445 PM EDT FRI JUN 17 2011 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL OSCEOLA COUNTY IN FLORIDA * UNTIL 545 PM EDT. * AT 441 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HOLOPAW. THIS STORM WAS NEARLY STATIONARY. * OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... HARMONY PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP AWAY FROM WINDOWS. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 2825 8125 2829 8097 2807 8092 2804 8113 TIME...MOT...LOC 2045Z 163DEG 2KT 2813 8105 $$ BOWEN
2 follow-up statements
825 WWUS52 KMLB 172100 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 500 PM EDT FRI JUN 17 2011 FLC097-172145- /O.CON.KMLB.SV.W.0068.000000T0000Z-110617T2145Z/ OSCEOLA- 500 PM EDT FRI JUN 17 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR CENTRAL OSCEOLA COUNTY... AT 457 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HOLOPAW AND WAS NEARLY STATIONARY. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HARMONY...REPTILE WORLD AND ALLIGATOR LAKE PRECAUTIONARY/PREPAREDNESS ACTIONS... HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED IN HOLOPAW WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. && LAT...LON 2825 8125 2829 8097 2807 8092 2804 8113 TIME...MOT...LOC 2059Z 163DEG 2KT 2814 8105 $$ BOWEN
106 WWUS52 KMLB 172129 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 529 PM EDT FRI JUN 17 2011 FLC097-172139- /O.CAN.KMLB.SV.W.0068.000000T0000Z-110617T2145Z/ OSCEOLA- 529 PM EDT FRI JUN 17 2011 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL OSCEOLA COUNTY IS CANCELLED... THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE. LAT...LON 2825 8125 2829 8097 2807 8092 2804 8113 TIME...MOT...LOC 2129Z 163DEG 2KT 2816 8106 $$ BOWEN
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 2:55 PM EDT | Special Weather Statement | MLB | Martin, Saint Lucie | 50 min |
| Jun 17, 3:41 PM EDT | Special Weather Statement | MLB | Martin, Saint Lucie | 49 min |
| Jun 17, 3:47 PM EDT | Special Weather Statement | MLB | Okeechobee | 58 min |
| Jun 17, 4:06 PM EDT | Severe Thunderstorm Warning | MLB | Osceola | 39 min |
| Jun 17, 4:14 PM EDT | Severe Thunderstorm Warning | MLB | Martin | 31 min |
| Jun 17, 5:15 PM EDT | Special Weather Statement | MLB | Orange | 60 min |
| Jun 17, 5:49 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 56 min |
| Jun 17, 6:02 PM EDT | Severe Thunderstorm Warning | MLB | Seminole, Volusia | 58 min |
| Jun 17, 6:11 PM EDT | Special Weather Statement | MLB | Lake | 49 min |
| Jun 17, 6:36 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Volusia | 54 min |
| Jun 17, 6:48 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange | 57 min |
| Jun 17, 7:02 PM EDT | Special Marine Warning | MLB | 118 min | |
| Jun 17, 7:17 PM EDT | Severe Thunderstorm Warning | MLB | Volusia | 42 min |
| Jun 17, 7:32 PM EDT | Special Weather Statement | MLB | Volusia | 43 min |
| Jun 17, 7:41 PM EDT | Areal Flood Advisory | MLB | Lake, Volusia | 2 hr |
| Jun 17, 7:41 PM EDT | Special Weather Statement | MLB | Lake | 49 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.