Alert archive / Alabama / Frost Advisories in 2011
Frost Advisory 3, NWS Birmingham, AL
NWS Birmingham, AL issued this frost advisory at May 4, 2011, 3:00 PM CDT for 9 counties in Alabama. It took effect at May 5, 2011, 3:00 AM CDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- May 4, 2011, 3:00 PM CDT (20:00 UTC)
- In effect from
- May 5, 2011, 3:00 AM CDT
- Expired
- May 5, 2011, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Birmingham, AL
Counties Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Etowah County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL
The radar
The Birmingham radar (KBMX), 98 km from the middle of the area, began a volume at 20:05 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
Birmingham, AL (KBMX), launched 12:00Z, 8.0 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1242 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -124 m²/s²
- 0-3 km storm-relative helicity
- -63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
745 WWUS74 KBMX 042000 NPWBMX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BIRMINGHAM AL 300 PM CDT WED MAY 4 2011 ...COLD TEMPERATURES EXPECTED ACROSS THE NORTHEAST TONIGHT... .TEMPERATURES ARE EXPECTED TO RANGE FROM THE MID TO UPPER 30S ACROSS THE NORTHEAST PORTIONS OF CENTRAL ALABAMA TONIGHT. WITH CALM WINDS AND CLEAR SKIES...LOOK FOR AREAS OF FROST GENERALLY NORTH OF A LINE FROM HAYDEN...TO TALLADEGA...TO WEDOWEE. ALZ017>021-026>029-051300- /O.NEW.KBMX.FR.Y.0003.110505T0800Z-110505T1300Z/ BLOUNT-ETOWAH-CALHOUN-CHEROKEE-CLEBURNE-ST. CLAIR-TALLADEGA-CLAY- RANDOLPH- INCLUDING THE CITIES OF...ONEONTA...GADSDEN...ANNISTON...CENTRE... HEFLIN...PELL CITY...MOODY...TALLADEGA...SYLACAUGA...ASHLAND... ROANOKE 300 PM CDT WED MAY 4 2011 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM CDT THURSDAY... THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 8 AM CDT THURSDAY. TEMPERATURES ARE EXPECTED TO RANGE FROM THE MID TO UPPER 30S ACROSS THE NORTHEAST PORTIONS OF CENTRAL ALABAMA TONIGHT. AREAS IMPACTED WILL BE ALONG AND NORTH OF A LINE FROM HAYDEN...TO TALLADEGA...TO WEDOWEE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 1:31 AM CDT | Dense Fog Advisory | BMX | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 22 more | 7 hr |
Nearby
Frost Advisories in Alabama, 2011Every frost advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.