Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Miami, FL

April 22, 2012Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 22, 2012, 1:58 AM EDT for Glades County, Florida. It was in force for 32 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
Apr 22, 2012, 1:58 AM EDT (05:58 UTC)
Expired
Apr 22, 2012, 2:30 AM EDT
In force
32 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Glades County, FL

The radar

The Tampa radar (KTBW), 130 km from the middle of the area, began a volume at 06:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 21, 11:08 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 6.0 hours before the alert went out and 130 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 00:00Z on 2012-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 00:00Z on 2012-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 square meters per square second.1939587897Sfc1 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
12 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

967 
WUUS52 KMFL 220558
SVRMFL
FLC043-220630-
/O.NEW.KMFL.SV.W.0006.120422T0558Z-120422T0630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
158 AM EDT SUN APR 22 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 230 AM EDT

* AT 154 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES WEST OF MUSE...AND
  MOVING NORTHEAST AT 30 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
OR LARGE DESTRUCTIVE 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.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR ROOM IN
THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS SPOTTED.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT SUNDAY MORNING FOR
SOUTHERN FLORIDA.

&&

LAT...LON 2689 8127 2677 8149 2677 8157 2703 8157
      2704 8152
TIME...MOT...LOC 0557Z 228DEG 25KT 2681 8161

$$

BAXTER
1 follow-up statement
878 
WWUS52 KMFL 220609
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
209 AM EDT SUN APR 22 2012

FLC043-220630-
/O.CON.KMFL.SV.W.0006.000000T0000Z-120422T0630Z/
GLADES FL-
209 AM EDT SUN APR 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM EDT
FOR SOUTHWESTERN GLADES COUNTY...

AT 203 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
MUSE...MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
MUSE...
  AND SURROUNDING COMMUNITIES.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

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.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT SUNDAY MORNING FOR
SOUTHERN FLORIDA.

LAT...LON 2689 8127 2677 8149 2677 8157 2703 8157
      2704 8152
TIME...MOT...LOC 0609Z 228DEG 25KT 2687 8154

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 12:16 AM EDTSpecial Weather StatementMFLBroward74 min
Apr 22, 1:22 AM EDTSpecial Marine WarningMFL53 min
Apr 22, 1:47 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry58 min
Apr 22, 2:12 AM EDTSpecial Marine WarningMFL63 min
Apr 22, 2:18 AM EDTSevere Thunderstorm WarningMFLGlades42 min
Apr 22, 2:26 AM EDTSpecial Marine WarningMFL64 min
Apr 22, 2:46 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry59 min
Apr 22, 2:57 AM EDTSevere Thunderstorm WarningMFLGlades33 min
Apr 22, 3:13 AM EDTSpecial Marine WarningMFL62 min
Apr 22, 3:22 AM EDTSpecial Marine WarningMFL38 min
Apr 22, 3:43 AM EDTSpecial Weather StatementMFLHendry62 min
Apr 22, 4:35 AM EDTSpecial Weather StatementMFLBroward, Miami-Dade, Palm Beach55 min
Apr 22, 4:49 AM EDTWind AdvisoryMFLBroward, Collier, Miami-Dade, Monroe12 hr
Apr 22, 5:02 AM EDTSpecial Marine WarningMFL106 min
Apr 22, 5:26 AM EDTSpecial Weather StatementMFLMiami-Dade49 min
Apr 22, 12:00 PM EDTSpecial Marine WarningMFL60 min
Apr 22, 12:41 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade35 min
Apr 22, 12:52 PM EDTSpecial Marine WarningMFL83 min
Apr 22, 1:36 PM EDTSpecial Marine WarningMFL54 min
Apr 22, 1:46 PM EDTSpecial Marine WarningMFL44 min
Apr 22, 2:12 PM EDTSpecial Marine WarningMFL63 min
Apr 22, 3:47 PM EDTSpecial Marine WarningMFL31 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.