Alert archive / Florida / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 20, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 5, 2011, 9:11 AM EDT for 6 counties in Florida. It was in force for 64 min. 5 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
- Apr 5, 2011, 9:11 AM EDT (13:11 UTC)
- Expired
- Apr 5, 2011, 10:15 AM EDT
- In force
- 64 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
Counties Brevard County, FL, Lake County, FL, Orange County, FL, Osceola County, FL, Seminole County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 60 km from the middle of the area, began a volume at 13:11 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 |
|---|---|---|---|
| Apr 5, 9:15 AM EDT | HAIL 0.7 | Sanford, FL | POLICE IN SANFORD REPORTED DIME-SIZED HAIL. TIME ESTIMATED BY RADAR. |
| Apr 5, 9:26 AM EDT | TSTM WND GST 44 | Orlando International A, FL | KMCO MEASURED WIND GUST OF 38 KT/44 MPH. |
| Apr 5, 9:52 AM EDT | TSTM WND GST 47 | 5 Wsw Playalinda Beach, FL | KTTS AT CAPE KENNEDY MEASURED WIND GUST OF 41 KT/47 MPH. |
| Apr 5, 10:20 AM EDT | TSTM WND GST 52 | 5 Ne Port Canaveral, FL | KSC 54 FT TOWER REPORTED WIND GUST OF 45 KT/52 MPH. |
| Apr 5, 10:25 AM EDT | TSTM WND DMG | Viera, FL | STRUCTURAL DAMAGE REPORTED NEAR VIERA BLVD AND US 1. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 5, 7:04 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 1.2 hours before the alert went out and 66 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
- 656 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 866 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
766
WUUS52 KMLB 051311
SVRMLB
FLC009-069-095-097-117-127-051415-
/O.NEW.KMLB.SV.W.0020.110405T1311Z-110405T1415Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
911 AM EDT TUE APR 5 2011
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN BREVARD COUNTY IN FLORIDA
SOUTHEASTERN LAKE COUNTY IN FLORIDA
ORANGE COUNTY IN FLORIDA
OSCEOLA COUNTY IN FLORIDA
SEMINOLE COUNTY IN FLORIDA
SOUTHERN VOLUSIA COUNTY IN FLORIDA
* UNTIL 1015 AM EDT.
* AT 908 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM ORANGE CITY TO WINTER PARK TO 25 MILES SOUTHWEST OF
POINCIANA PLACE...AND MOVING EAST AT 45 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED
TO... SANFORD...ORLANDO...GOLDENROD...WINTER SPRINGS...PINE
CASTLE...DELTONA...MIDWAY...BELLE ISLE... CONWAY...AZALEA
PARK...LAKE JESSUP...CAMPBELL...KISSIMMEE...UNION
PARK...OSTEEN...ORLANDO INTERNATIONAL
AIRPORT...OVIEDO...POINCIANA...GENEVA...BITHLO...SAINT
CLOUD...NARCOOSSEE...MAYTOWN...CHRISTMAS...SCOTTSMOOR...OAK
HILL...HARMONY...ELDORA... APOLLO BEACH...MIMS...LAKE
KISSIMMEE...TITUSVILLE...HOLOPAW... HAULOVER CANAL...TITUSVILLE
AIRPORT...LONE CABBAGE FISH CAMP... CANAVERAL GROVES...PORT SAINT
JOHN...KLONDIKE BEACH...SHARPES...COCOA...ROCKLEDGE...MERRITT
ISLAND...VIERA...SUNTREE...PORT CANAVERAL...CAPE CANAVERAL AND COCOA
BEACH
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. HAIL TO DIME SIZE MAY ALSO BE POSSIBLE EMBEDDED
IN THIS LINE OF STORMS.
NATIONAL WEATHER SERVICE METEOROLOGISTS ALSO DETECTED SOME WEAK
ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A SMALL INTERIOR
ROOM.
&&
LAT...LON 2903 8141 2893 8086 2888 8081 2893 8083
2893 8081 2846 8052 2830 8062 2858 8060
2825 8065 2792 8087 2790 8133 2804 8146
2805 8146 2802 8138 2807 8135 2808 8145
2825 8157 2826 8166 2834 8167 2834 8179
TIME...MOT...LOC 1309Z 276DEG 37KT 2893 8127 2861 8134
2792 8179
$$
SEDLOCK2 follow-up statements
589
WWUS52 KMLB 051324
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
924 AM EDT TUE APR 5 2011
FLC069-051332-
/O.CAN.KMLB.SV.W.0020.000000T0000Z-110405T1415Z/
LAKE-
924 AM EDT TUE APR 5 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAKE COUNTY IS
CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM EDT
TUESDAY AFTERNOON FOR EAST CENTRAL FLORIDA.
LAT...LON 2898 8127 2888 8081 2893 8083 2893 8082
2860 8060 2848 8064 2857 8059 2847 8052
2831 8062 2848 8064 2847 8064 2825 8065
2792 8087 2790 8132 2804 8146 2805 8146
2802 8138 2807 8135 2808 8145 2826 8161
TIME...MOT...LOC 1322Z 276DEG 37KT 2891 8112 2860 8119
2791 8164
$$
FLC009-095-097-117-127-051415-
/O.CON.KMLB.SV.W.0020.000000T0000Z-110405T1415Z/
OSCEOLA-ORANGE-SEMINOLE-VOLUSIA-BREVARD-
924 AM EDT TUE APR 5 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT
FOR NORTHWESTERN BREVARD...SOUTHEASTERN VOLUSIA...SEMINOLE...ORANGE
AND OSCEOLA COUNTIES...
AT 919 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM DELTONA TO UNIVERSITY OF CENTRAL FLORIDA TO 21 MILES
SOUTHWEST OF POINCIANA PLACE...MOVING EAST AT 45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
UNIVERSITY
PARK...POINCIANA...GENEVA...CHULUOTA...LOCKWOOD...FARMTON...SAINT
CLOUD...NARCOOSSEE...WEDGEFIELD...MAYTOWN...REPTILE
WORLD...CHRISTMAS...PINE GROVE...SCOTTSMOOR...OAK
HILL...HARMONY...AURANTIA...TURNBULL...ELDORA...APOLLO
BEACH...MIMS...SHILOH...LAKE
KISSIMMEE...LAGRANGE...TITUSVILLE...HAULOVER CANAL...HOLOPAW...LONE
CABBAGE FISH CAMP...BELLWOOD...CANAVERAL ACRES...CANAVERAL
GROVES...PORT SAINT JOHN...FOREVER
FLORIDA...SHARPES...VIERA...SUNTREE...PORT CANAVERAL...JETTY
PARK...PINEDA...GEORGIANA...COCOA BEACH...MERRITT ISLAND AND
ROCKLEDGE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM EDT
TUESDAY AFTERNOON FOR EAST CENTRAL FLORIDA.
&&
LAT...LON 2898 8127 2888 8081 2893 8083 2893 8082
2860 8060 2848 8064 2857 8059 2847 8052
2831 8062 2848 8064 2847 8064 2825 8065
2792 8087 2790 8132 2804 8146 2805 8146
2802 8138 2807 8135 2808 8145 2826 8161
TIME...MOT...LOC 1322Z 276DEG 37KT 2891 8112 2860 8119
2791 8164
$$
SEDLOCK711
WWUS52 KMLB 051349
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
949 AM EDT TUE APR 5 2011
FLC117-051358-
/O.CAN.KMLB.SV.W.0020.000000T0000Z-110405T1415Z/
SEMINOLE-
949 AM EDT TUE APR 5 2011
...THE SEVERE THUNDERSTORM WARNING FOR SEMINOLE COUNTY IS
CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM EDT
TUESDAY AFTERNOON FOR EAST CENTRAL FLORIDA.
LAT...LON 2831 8062 2847 8062 2846 8064 2846 8065
2825 8065 2792 8087 2790 8132 2804 8146
2807 8135 2814 8148 2861 8099 2886 8083
2866 8067 2867 8066 2893 8083 2893 8082
2861 8060 2846 8064 2857 8059 2846 8052
TIME...MOT...LOC 1348Z 276DEG 37KT 2888 8082 2857 8089
2788 8134
$$
FLC009-095-097-127-051415-
/O.CON.KMLB.SV.W.0020.000000T0000Z-110405T1415Z/
OSCEOLA-ORANGE-VOLUSIA-BREVARD-
949 AM EDT TUE APR 5 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT
FOR NORTHWESTERN BREVARD...EXTREME SOUTHEASTERN
VOLUSIA...SOUTHEASTERN ORANGE AND NORTHERN OSCEOLA COUNTIES...
AT 944 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM ELDORA TO 6 MILES EAST OF CHRISTMAS PARK TO 7 MILES
WEST OF LAKE KISSIMMEE...MOVING EAST AT 45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MIMS...
SHILOH...LAGRANGE...TITUSVILLE...HAULOVER CANAL...HOLOPAW...LONE
CABBAGE FISH CAMP...BELLWOOD...CANAVERAL ACRES...CANAVERAL
GROVES...PORT SAINT JOHN...KLONDIKE BEACH...FOREVER
FLORIDA...SHARPES...COCOA...DEER PARK...ROCKLEDGE...MERRITT
ISLAND...VIERA...SUNTREE...PORT CANAVERAL...PINEDA...GEORGIANA AND
COCOA BEACH
PRECAUTIONARY/PREPAREDNESS ACTIONS...
NATIONAL WEATHER SERVICE METEOROLOGISTS ALSO DETECTED WEAK ROTATION
WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL
DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY IN A STURDY STRUCTURE...SUCH AS A SMALL INTERIOR ROOM. HAIL
TO DIME SIZE IS POSSIBLE IN STRONGER CELLS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM EDT
TUESDAY AFTERNOON FOR EAST CENTRAL FLORIDA.
&&
LAT...LON 2831 8062 2847 8062 2846 8064 2846 8065
2825 8065 2792 8087 2790 8132 2804 8146
2807 8135 2814 8148 2861 8099 2886 8083
2866 8067 2867 8066 2893 8083 2893 8082
2861 8060 2846 8064 2857 8059 2846 8052
TIME...MOT...LOC 1348Z 276DEG 37KT 2888 8082 2857 8089
2788 8134
$$
SEDLOCKThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 3:10 AM EDT | Lake Wind Advisory | MLB | Lake, Okeechobee, Orange, Osceola, Seminole, Volusia | 10 hr |
| Apr 5, 7:20 AM EDT | Special Weather Statement | MLB | Lake, Volusia | 55 min |
| Apr 5, 7:45 AM EDT | Severe Thunderstorm Warning | MLB | Lake, Volusia | 60 min |
| Apr 5, 7:48 AM EDT | Special Marine Warning | MLB | 117 min | |
| Apr 5, 8:15 AM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange, Osceola, Seminole | 60 min |
| Apr 5, 8:45 AM EDT | Special Weather Statement | MLB | Volusia | 45 min |
| Apr 5, 8:52 AM EDT | Severe Thunderstorm Warning | MLB | Brevard, Volusia | 38 min |
| Apr 5, 9:19 AM EDT | Special Marine Warning | MLB | 116 min | |
| Apr 5, 10:14 AM EDT | Severe Thunderstorm Warning | MLB | Brevard, Indian River, Osceola | 61 min |
| Apr 5, 10:50 AM EDT | Special Marine Warning | MLB | 115 min | |
| Apr 5, 10:58 AM EDT | Severe Thunderstorm Warning | MLB | Brevard, Indian River, Okeechobee, Saint Lucie | 62 min |
| Apr 5, 11:59 AM EDT | Severe Thunderstorm Warning | MLB | Martin, Okeechobee, Saint Lucie | 61 min |
| Apr 5, 12:38 PM EDT | Special Marine Warning | MLB | 112 min | |
| Apr 5, 12:59 PM EDT | Severe Thunderstorm Warning | MLB | Martin | 46 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.