Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 159, NWS Miami, FL

September 28, 2012Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Sep 28, 2012, 5:17 PM EDT for Glades County, Florida. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 28, 2012, 5:17 PM EDT (21:17 UTC)
Expired
Sep 28, 2012, 6:00 PM EDT
In force
43 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Glades County, FL

The radar

The Melbourne radar (KMLB), 129 km from the middle of the area, began a volume at 21:18 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

Tampa Bay, FL (KTBW), launched 12:00Z, 9.3 hours before the alert went out and 148 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.

Skew-T log-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2012-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1081 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2012-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1081 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
914 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

213 
WUUS52 KMFL 282117
SVRMFL
FLC043-282200-
/O.NEW.KMFL.SV.W.0159.120928T2117Z-120928T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
517 PM EDT FRI SEP 28 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL GLADES COUNTY IN SOUTH FLORIDA.

* UNTIL 600 PM EDT

* AT 513 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 3 MILES
  WEST OF BRIGHTON SEMINOLE INDIAN...AND MOVING SOUTHWEST AT 10 MPH.

* THE STORM WILL AFFECT...
  LAKEPORT...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
OR LARGE HAIL. FREQUENT TO EXCESSIVE LIGHTNING AND HEAVY RAINFALL IS
ALSO POSSIBLE. IF THE STORM APPROACHES YOUR LOCATION, SEEK SHELTER IN
AN ENCLOSED BUILDING ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI.

&&

LAT...LON 2708 8092 2708 8094 2707 8093 2703 8096
      2705 8098 2698 8108 2692 8107 2693 8110
      2689 8111 2686 8109 2693 8142 2704 8132
      2704 8128 2709 8127 2713 8123 2713 8117
      2716 8117
TIME...MOT...LOC 2117Z 031DEG 11KT 2707 8112

$$

BAXTER
2 follow-up statements
497 
WWUS52 KMFL 282126
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
526 PM EDT FRI SEP 28 2012

FLC043-282200-
/O.CON.KMFL.SV.W.0159.000000T0000Z-120928T2200Z/
GLADES FL-
526 PM EDT FRI SEP 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR CENTRAL GLADES COUNTY...

AT 523 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHEAST OF BRIGHTON
SEMINOLE INDIAN TO 9 MILES NORTHWEST OF LAKEPORT...MOVING SOUTH AT 10
MPH.

THE SEVERE THUNDERSTORMS WILL BE NEAR...
LAKEPORT...
  AND SURROUNDING COMMUNITIES.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI.

LAT...LON 2708 8092 2708 8094 2707 8093 2703 8096
      2705 8098 2698 8108 2692 8107 2693 8110
      2689 8111 2686 8109 2693 8142 2704 8132
      2704 8128 2709 8127 2713 8123 2713 8117
      2716 8117
TIME...MOT...LOC 2126Z 021DEG 7KT 2701 8093 2706 8123

$$

BAXTER
940 
WWUS52 KMFL 282152
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
552 PM EDT FRI SEP 28 2012

FLC043-282202-
/O.EXP.KMFL.SV.W.0159.000000T0000Z-120928T2200Z/
GLADES FL-
552 PM EDT FRI SEP 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL GLADES COUNTY WILL
EXPIRE AT 600 PM EDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORMS HAVE
WEAKENED. THUS THE THUNDERSTORM WARNING WILL EXPIRE AT 600 PM EDT.

THUNDERSTORMS REMAIN IN THE AREA WHICH CAN STILL PRODUCE FREQUENT
LIGHTNING...GUSTY WINDS TO 40 MPH...VERY HEAVY RAINFALL...AND
SMALL HAIL. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR
THE LATEST UPDATES.

LAT...LON 2708 8092 2708 8094 2707 8093 2703 8096
      2705 8098 2698 8108 2692 8107 2693 8110
      2689 8111 2686 8109 2693 8142 2704 8132
      2704 8128 2709 8127 2713 8123 2713 8117
      2716 8117
TIME...MOT...LOC 2152Z 021DEG 7KT 2696 8095 2701 8125

$$

BAXTER

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 8:27 AM EDTSpecial Marine WarningMFL48 min
Sep 28, 2:30 PM EDTSpecial Weather StatementMFLMiami-Dade30 min
Sep 28, 2:55 PM EDTSpecial Weather StatementMFLMiami-Dade35 min
Sep 28, 3:09 PM EDTSpecial Weather StatementMFLPalm Beach51 min
Sep 28, 3:11 PM EDTSpecial Weather StatementMFLBroward34 min
Sep 28, 3:19 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade41 min
Sep 28, 3:26 PM EDTSevere Thunderstorm WarningMFLPalm Beach34 min
Sep 28, 3:33 PM EDTSpecial Weather StatementMFLMiami-Dade27 min
Sep 28, 4:10 PM EDTSpecial Weather StatementMFLMiami-Dade35 min
Sep 28, 4:15 PM EDTSpecial Weather StatementMFLBroward60 min
Sep 28, 4:58 PM EDTSpecial Weather StatementMFLGlades62 min
Sep 28, 5:33 PM EDTSpecial Marine WarningMFL57 min
Sep 28, 6:19 PM EDTSpecial Marine WarningMFL56 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.