Alert archive / Florida / Wind Chill Advisories in 2009
Wind Chill Advisory 1, NWS Miami, FL
NWS Miami, FL issued this wind chill advisory at Jan 20, 2009, 4:55 AM EST for 7 counties in Florida. It took effect at Jan 20, 2009, 10:00 PM EST. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Jan 20, 2009, 4:55 AM EST (09:55 UTC)
- In effect from
- Jan 20, 2009, 10:00 PM EST
- Expired
- Jan 21, 2009, 9:00 AM EST
- In force
- 11 hr
- Issued by
- NWS Miami, FL
Counties Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 82 km from the middle of the area, began a volume at 09:58 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 00:00Z, 9.9 hours before the alert went out and 224 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
- 32 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1128 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Miami, FL wrote its last area forecast discussion before this wind chill advisory went out at Jan 20, 12:58 AM EST, 3 hours 57 minutes earlier.
Area forecast discussion, Jan 20, 12:58 AM EST, 3 hours 57 minutes before
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</html>Hazardous weather outlook, Jan 19, 9:45 PM EST, 7 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA...UPDATED NATIONAL WEATHER SERVICE MIAMI FL 945 PM EST MON JAN 19 2009 FLZ063-066>075-168-172>174-201330- GLADES-HENDRY-INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER- INLAND COLLIER-INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE- METRO MIAMI DADE-MAINLAND MONROE-COASTAL PALM BEACH- COASTAL BROWARD-COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE- 945 PM EST MON JAN 19 2009 ...GALE WARNING PALM BEACH ATLANTIC WATERS & LAKE OKEECHOBEE OVERNIGHT... ...WIND CHILLS FORECAST TO FALL INTO THE 30S ALL AREAS LATE TUE NIGHT... ...FREEZING TEMPERATURES POSSIBLE INTERIOR, ESPECIALLY LATE WED NIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...TONIGHT WIND: WEST TO SOUTHWEST WINDS OF 20 TO 25 KNOTS WILL INCREASE TO 25 TO 30 KNOTS OVERNIGHT ACROSS THE LOCAL MARINE AREAS. THE STRONGEST WINDS ARE EXPECTED OVER THE ATLANTIC WATERS OFF THE PALM BEACH COAST AS WELL AS OVER LAKE OKEECHOBEE, WHERE SUSTAINED WINDS OF AROUND 30 KNOTS IS EXPECTED WITH FREQUENT GUSTS TO GALE FORCE, OR 34 KNOTS OR HIGHER. DUE TO THESE EXPECTATIONS, A GALE WARNING IS IN EFFECT FOR THE PALM BEACH ATLANTIC WATERS AS WELL AS LAKE OKEECHOBEE. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE REST OF THE LOCAL MARINE AREAS. WAVES: SEAS IN THE GULF STREAM AND THE OFFSHORE GULF WATERS WILL BUILD TO 7 TO 8 FEET LATE TONIGHT. RIP CURRENTS: THERE IS A SLIGHT RISK OF RIP CURRENTS AT THE GULF OF MEXICO BEACHES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A STRONG COLD FRONT WILL MOVE ACROSS THE AREA ON TUESDAY BRINGING IN THE COLDEST AIRMASS OF THIS WINTER SEASON. ON TUESDAY NIGHT, LOWS WILL FALL INTO THE 30S INTERIOR TO THE LOWER TO MID 40S AT THE COASTS. TEMPERATURES COULD EVEN APPROACH FREEZING OVER NORTHERN INTERIOR AREAS TUESDAY NIGHT. WIND CHILLS WILL BE THE BIGGER STORY AREA WIDE. A NORTHWEST WIND OF 5 TO 15 MPH IS EXPECTED TO PREVAIL THROUGHOUT THE NIGHT, DROPPING WIND CHILLS INTO THE LOWER TO MID 30S ACROSS ALL OF MAINLAND SOUTH FLORIDA. WIND CHILL READINGS IN THE UPPER 20S ARE EVEN A POSSIBILITY OVER NORTHERN INTERIOR AREAS. THE COLDEST AIR TEMPERATURES ARE FORECAST WEDNESDAY NIGHT AS WINDS BECOME CALM WHILE A HIGH OF ARCTIC ORIGIN RIDGES INTO THE AREA FROM THE NORTHWEST. THIS WILL SET THE STAGE FOR A BETTER POSSIBILITY OF FREEZING TEMPERATURES ACROSS A LARGE PORTION OF INTERIOR SOUTH FLORIDA WEDNESDAY NIGHT INTO EARLY THURSDAY MORNING. LOWS BY EARLY THURSDAY MORNING ARE FORECAST TO FALL INTO THE LOWER 30S INTERIOR...MID TO UPPER 30S ELSEWHERE...EXCEPT LOWER 40S SOUTHEAST COAST. THERE CONTINUES TO BE SOME UNCERTAINTY IN JUST HOW COLD IT WILL GET ACROSS SOUTH FLORIDA...SO ALL INTERESTS ARE ADVISED TO MONITOR THE LATEST FORECAST UPDATES FROM THE NATIONAL WEATHER SERVICE IN MIAMI ON THIS UPCOMING COLD WEATHER EVENT. MARINE CONDITIONS WILL CONTINUE POOR ON TUESDAY DUE TO STRONG NORTHWEST WINDS. THE WIND WILL SUBSIDE ON WEDNESDAY...BUT SEAS IN THE GULF STREAM WILL CONTINUE HAZARDOUS THROUGH MID WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI. GREGORIA
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 19, 10:07 PM EST | Gale Warning | MFL | 12 hr | |
| Jan 20, 4:26 AM EST | Fire Weather Watch | MFL | Broward, Collier, Miami-Dade, Monroe, Palm Beach | 8 hr |
| Jan 20, 4:42 AM EST | Freeze Watch | MFL | Glades, Hendry, Palm Beach | 9 hr |
| Jan 20, 4:42 AM EST | Freeze Watch | MFL | Broward, Collier, Glades, Hendry, Miami-Dade, Palm Beach | 25 hr |
| Jan 20, 5:05 AM EST | Coastal Flood Statement | MFL | Collier | 13 hr |
| Jan 20, 12:30 PM EST | Fire Weather Watch | MFL | Broward, Collier, Miami-Dade, Monroe, Palm Beach | 39 hr |
| Jan 20, 12:30 PM EST | Red Flag Warning | MFL | Broward, Collier, Miami-Dade, Monroe, Palm Beach | 30 hr |
| Jan 20, 1:29 PM EST | Freeze Warning | MFL | Glades, Hendry, Palm Beach | 20 hr |
Nearby
Wind Chill Advisories in Florida, 2009Every wind chill advisory in 2009
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.