Alert archive / Florida / Tornado Warnings in 2008

Tornado Warning 13, NWS Key West, FL

September 10, 2008Monroe County, Florida

NWS Key West, FL issued this tornado warning at Sep 10, 2008, 12:53 AM EDT for Monroe County, Florida. It was in force for 22 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 10, 2008, 12:53 AM EDT (04:53 UTC)
Expired: Sep 10, 2008, 1:15 AM EDT
In force: 22 min
Issued by: NWS Key West, FL
Area: Storm-based polygon

County Monroe County, FL

The radar

The Miami radar (KAMX), 73 km from the middle of the area, began a volume at 04:56 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

Miami, FL (KMFL), launched 00:00Z, 4.9 hours before the alert went out and 98 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3819 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 207 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.

000 
WFUS52 KKEY 100453
TORKEY
FLC087-100515-
/O.NEW.KKEY.TO.W.0013.080910T0453Z-080910T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
1253 AM EDT WED SEP 10 2008

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* TORNADO WARNING FOR...
  UPPER KEYS IN MONROE COUNTY IN FLORIDA...

* UNTIL 115 AM EDT

* AT 1247 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 6 MILES   
  SOUTHEAST OF WINDLEY KEY...MOVING NORTHWEST NEAR 50 MPH.

* COMMUNITIES IN THE PATH OF THE TORNADO INCLUDE PLANTATION KEY.

TORNADOES ASSOCIATED WITH TROPICAL CYCLONES MOVE RAPIDLY...ARE OFTEN
WRAPPED IN HEAVY RAIN...AND ARE DIFFICULT TO SEE OR HEAR UNTIL THEY
ARE VERY CLOSE. SEEK SAFE SHELTER IMMEDIATELY

LAT...LON 2495 8057 2495 8059 2491 8063 2493 8065
      2495 8064 2495 8062 2497 8059 2497 8057
      2502 8055 2502 8052 2505 8050 2503 8048
TIME...MOT...LOC 0452Z 146DEG 58KT 2501 8058

$$

KASPER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 11:30 PM EDT	Small Craft Advisory	KEY		65 hr
Sep 10, 1:05 AM EDT	Special Marine Warning	KEY		85 min
Sep 10, 2:13 AM EDT	Tornado Warning	KEY	Monroe	32 min
Sep 10, 2:27 AM EDT	Special Marine Warning	KEY		63 min
Sep 10, 3:33 AM EDT	Special Marine Warning	KEY		57 min
Sep 10, 3:45 AM EDT	Tornado Warning	KEY	Monroe	30 min
Sep 10, 4:22 AM EDT	Areal Flood Advisory	KEY	Monroe	3 hr
Sep 10, 4:35 AM EDT	Special Marine Warning	KEY		55 min
Sep 10, 6:54 AM EDT	Special Marine Warning	KEY		111 min
Sep 10, 8:12 AM EDT	Special Marine Warning	KEY		45 min
Sep 10, 5:02 PM EDT	Special Marine Warning	KEY		58 min

Nearby

Tornado Warnings in Florida, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.