Alert archive / Florida / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 41, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at May 31, 2012, 5:30 PM EDT for Seminole County, Volusia County, Florida. It was in force for 30 min. 2 reports 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
- May 31, 2012, 5:30 PM EDT (21:30 UTC)
- Expired
- May 31, 2012, 6:00 PM EDT
- In force
- 30 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
Counties Seminole County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 97 km from the middle of the area, began a volume at 21:31 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 |
|---|---|---|---|
| May 31, 5:40 PM EDT | HAIL 0.7 | 3 Ssw Farmton, FL | NSSL RELAYED REPORT OF DIME SIZE HAIL FROM 540 PM TO 550 PM 2.8 MILES SSW OF FARMTON. |
| May 31, 6:06 PM EDT | HAIL 0.25 | 2 Ese Lake Harney, FL | NSSL RELAYED REPORT OF PEA SIZE HAIL FROM 606 PM TO 611 PM 2.2 MILES ESE OF LAKE HARNEY. |
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, 9.5 hours before the alert went out and 74 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
- 360 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1044 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
595
WUUS52 KMLB 312130
SVRMLB
FLC117-127-312230-
/O.NEW.KMLB.SV.W.0041.120531T2130Z-120531T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
530 PM EDT THU MAY 31 2012
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN SEMINOLE COUNTY IN FLORIDA
SOUTHEASTERN VOLUSIA COUNTY IN FLORIDA
* UNTIL 630 PM EDT.
* AT 526 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
GENEVA...AND MOVING NORTHEAST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
DELTONA...LAKE HELEN...MAYTOWN AND PORT ORANGE
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.
&&
LAT...LON 2919 8105 2880 8084 2879 8091 2879 8097
2869 8108 2879 8132 2898 8136
TIME...MOT...LOC 2130Z 219DEG 12KT 2879 8109
$$
DWS2 follow-up statements
532
WWUS52 KMLB 312148
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
548 PM EDT THU MAY 31 2012
FLC117-127-312230-
/O.CON.KMLB.SV.W.0041.000000T0000Z-120531T2230Z/
SEMINOLE-VOLUSIA-
548 PM EDT THU MAY 31 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHEASTERN VOLUSIA AND NORTHEASTERN SEMINOLE COUNTIES...
AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR LAKE HARNEY...OR NEAR GENEVA...MOVING EAST-NORTHEAST
AT 10 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FARMTON...LAKE ASHBY...AND MAYTOWN
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 2880 8084 2880 8085 2879 8091 2879 8097
2869 8108 2878 8117 2893 8128 2908 8100
TIME...MOT...LOC 2146Z 243DEG 11KT 2876 8105
$$
DWS910
WWUS52 KMLB 312200
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
600 PM EDT THU MAY 31 2012
FLC117-127-312209-
/O.CAN.KMLB.SV.W.0041.000000T0000Z-120531T2230Z/
SEMINOLE-VOLUSIA-
600 PM EDT THU MAY 31 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VOLUSIA AND
NORTHEASTERN SEMINOLE COUNTIES IS CANCELLED...
THE SEVERE STORMS THAT PROMPTED THE WARNING HAD WEAKENED AND WERE 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.
THE POSSIBILITY FOR SEVERE STORMS IS MOVING INTO NORTH BREVARD
COUNTY THROUGH 7 PM EDT.
LAT...LON 2880 8084 2880 8085 2879 8091 2879 8097
2869 8108 2878 8117 2893 8128 2908 8100
TIME...MOT...LOC 2159Z 254DEG 10KT 2874 8099
$$
DWSThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 4:04 PM EDT | Special Weather Statement | MLB | Lake | 56 min |
| May 31, 4:45 PM EDT | Special Weather Statement | MLB | Seminole | 60 min |
| May 31, 5:57 PM EDT | Special Weather Statement | MLB | Seminole | 33 min |
| May 31, 6:17 PM EDT | Special Weather Statement | MLB | Volusia | 43 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012
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.