Alert archive / North Carolina / Freeze Warnings in 2007

Freeze Warning 3, NWS Raleigh, NC

April 7, 200731 counties in North Carolina

NWS Raleigh, NC issued this freeze warning at Apr 7, 2007, 4:19 AM EDT for 31 counties in North Carolina. It took effect at Apr 8, 2007, 12:00 AM EDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 7, 2007, 4:19 AM EDT (08:19 UTC)
In effect from: Apr 8, 2007, 12:00 AM EDT
Expired: Apr 8, 2007, 9:14 AM EDT
In force: 9 hr
Issued by: NWS Raleigh, NC

All 31 counties

Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 45 km from the middle of the area, began a volume at 08:18 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

Roanoke, VA (KRNK), launched 00:00Z, 8.3 hours before the alert went out and 174 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 101 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this freeze warning went out at Apr 7, 3:41 AM EDT, 38 minutes earlier.

Area forecast discussion, Apr 7, 3:41 AM EDT, 38 minutes before

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Hazardous weather outlook, Apr 6, 11:03 AM EDT, 17 hours 16 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
1103 AM EDT FRI APR 6 2007

NCZ007>011-021>028-038>043-073>078-083>086-088-089-071515-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-FORSYTH-GUILFORD-ALAMANCE-
ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-DAVIDSON-RANDOLPH-CHATHAM-WAKE-
JOHNSTON-WILSON-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-WAYNE-ANSON-
RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
1103 AM EDT FRI APR 6 2007

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
SATURDAY...
...FIRE WEATHER WATCH IN EFFECT THROUGH SUNDAY EVENING...
...FREEZE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY
MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FREEZE WARNING

TEMPERATURES WILL FALL BELOW FREEZING AFTER MIDNIGHT TONIGHT. A
KILLING FREEZE IS POSSIBLE...ESPECIALLY ACROSS THE NORTHERN TIER
OF CENTRAL NORTH CAROLINA WHICH INCLUDES THE TRIAD AND TRIANGLE
AREAS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FIRE WEATHER WATCH
   FREEZE WARNING
   FREEZE WATCH

COLDER AIR WILL CONTINUE TO MOVE SOUTH INTO THE AREA...AND A HARD
FREEZE IS EXPECTED ACROSS MOST OF CENTRAL NORTH CAROLINA LATE
SATURDAY NIGHT. GUSTY WINDS COMBINED WITH VERY DRY CONDITIONS WILL
CREATE DANGEROUS FIRE CONDITIONS BOTH SATURDAY AND SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Apr 7, 1:59 AM EDT, 2 hours 20 minutes before

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Special weather statement, Apr 7, 3:30 AM EDT, 49 minutes before

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The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 3:29 PM EDT	Freeze Watch	RAH	Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 25 more	13 hr

Nearby

Freeze Warnings in North Carolina, 2007 Every freeze warning in 2007

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.