Saturday, April 07, 2007

Records are in danger tonight

According to the NWS Huntsville, these are the coldest all-time
temperatures in the following locations in North Alabama:

Site Temp Date
Huntsville 24º April 1, 1923
Muscle Shoals 24º April 13, 1940*
Decatur 26º April 13, 1940*
Scottsboro 23º April 3, 1992*
Valley Head 19º April 3, 1992

The NWS Huntsville also shows the following record lows for this date are:
Site Temp Date
Huntsville 27º 1950
Muscle Shoals 30º 1982
Decatur 31º 1950
Scottsboro 25º 1950
Valley Head 21º 1982

The official forecast from the National Weather Service Huntsville tonight is as follows:
Huntsville 23
Muscle Shoals 23
Decatur 23
Scottsboro 23
Valley Head 22
Vinemont 23
If these temperatures are reached many all time April records will be set tonight in North Alabama.

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A freeze warning has been issued by the NWS in Huntsville:
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE HUNTSVILLE AL
345 PM CDT SAT APR 7 2007

LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-
MORGAN-MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-
FRANKLIN
TN-INCLUDING THE CITIES OF...FLORENCE...MUSCLE SHOALS...
RUSSELLVILLE...MOULTON...ATHENS...HUNTSVILLE...DECATUR...
GUNTERSVILLE...SCOTTSBORO...FORT PAYNE...CULLMAN...
LYNCHBURG...FAYETTEVILLE...WINCHESTER

345 PM CDT SAT APR 7 2007

...FREEZE WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
9 AM CDT SUNDAY...

AN UNSEASONABLY COLD AIRMASS COUPLED WITH LIGHT WINDS...CLEAR
SKIES AND VERY DRY CONDITIONS WILL SUPPORT RECORD-SETTING COLD
TEMPERATURES OVERNIGHT. TEMPERATURES WILL FALL QUICKLY BELOW
FREEZING BY LATE EVENING...REMAINING AT OR BELOW FREEZING
THROUGH AT LEAST MID MORNING SUNDAY. MINIMUM TEMPERATURES OF
20 TO 25 DEGREES COULD APPROACH THE COLDEST EVER RECORDED IN
THE MONTH OF APRIL.

THIS WIDESPREAD AND LONG-DURATION HARD FREEZE WILL BE CRITICAL
TO PLANTS AND CROPS. THOSE WITH AGRICULTURAL OR GARDENING
INTERESTS ARE ADVISED TO HARVEST OR PROTECT TENDER VEGETATION
IF SUCH ACTIONS HAVE NOT BEEN TAKEN ALREADY. PERSONS ARE ALSO
URGED TO PROTECT OUTDOOR PETS FROM THE COLD. SUB-FREEZING
TEMPERATURES ARE AGAIN LIKELY SUNDAY NIGHT INTO MONDAY
MORNING.


A FREEZE WARNING IS ISSUED WHEN FREEZING TEMPERATURES ARE
FORECAST TO THREATEN OUTDOOR PLANTS AND TENDER VEGETATION.
POTTED PLANTS NORMALLY LEFT OUTDOORS SHOULD BE COVERED OR
BROUGHT INSIDE AWAY FROM THE COLD.

Here is an exerpt from the NWS Huntsville forecast discussion:
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
318 PM CDT SAT APR 7 2007

...UNPRECEDENTED COLD GRIPS THE TENNESSEE VALLEY...

.DISCUSSION...THE MAIN STORY IN THE SHORT TERM WILL CONTINUE
TO BE THE RECORD-SETTING COLD AND DRY CONDITIONS RESULTING
IN CRITICAL FIRE WEATHER CONDITIONS.

LATEST WV/IR SATL IMAGERY SHOWS NEARLY STATIONARY DEEP
CYCLONIC TROUGH CENTERED AROUND UPSTATE NEW YORK THIS AFTN.
THIS FEATURE IS THE FOCAL POINT FOR DRAWING UNSEASONABLY COLD
CANADIAN AIR ACROSS THE TENNESSEE VALLEY. AFTER RECORD LOWS
WERE SET THIS MORNING AT BOTH HSV AND MSL...TEMPS HAVE
STRUGGLED TO WARM MUCH WITHIN STRONG COLD-ADVECTIVE REGIME.
19Z TEMPS WERE STILL IN THE UPR 30S AT BOTH CULLMAN (3A1)
AND MERIDIANVILLE (MDQ)...WITH 42F AT HSV WELL BELOW THE
COLDEST DAILY MAX TEMP OF 50F SET BACK IN 1939.

.SHORT TERM (TONIGHT THROUGH MONDAY)...
UPR LVL LOW ENTERING WEST TEXAS WILL CONTINUE TO WEAKEN AND
SHEAR EAST ALONG THE GULF COAST OVER THE NEXT COUPLE DAYS...
HAVING LITTLE EFFECT ON OUR SENSIBLE WEATHER. THIN HIGH CLOUDS
WILL STREAK ACROSS THE AREA TONIGHT BUT THE DEEPER MOISTURE
WILL REMAIN WELL SOUTH. LIGHT WINDS AND VERY LOW DEWPOINTS
WILL HELP SET THE STAGE FOR ANOTHER RECORD COLD NIGHT.
FORECASTING LOWS IN THE 20-25F RANGE. LOW LVL THICKNESS/TEMP
PROFILES ARE ACTUALLY WARMER TMRW MORNING THAN THIS MORNING...
BUT LIGHTER WINDS AND THE VERY DRY CONDITIONS WILL PROVIDE
MAXIMUM RADIATIONAL COOLING OVERNIGHT. FREEZE WARNING WILL
REMAIN IN EFFECT FROM 10 PM TONIGHT THROUGH 9 AM SUNDAY.
INCIDENTLY...GOING FOR A LOW OF 23F AT HUNTSVILLE INTERNATIONAL
AIRPORT (HSV). SINCE RECORDS HAVE BEEN KEPT HERE (NEARLY 100
YEARS) THE COLDEST TEMP EVER REPORTED AT HSV IS 24F BACK ON
APRIL 1, 1923.

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Here is an exerpt from the ABC 33/40 Seven Day Forecast by Bill Murray
Historic weather may be on the menu for Alabama on this Holiday Weekend as potentially

the coldest air ever seen in these parts in any April is in store for us. If we drop to 25F or
lower at the Birmingham Airport, it will be the coldest April morning ever in the history of
the station.

WATCHING THE THERMOMETER:
It will be a nervous night for growers all across the state of Alabama and the Deep South.
Peach growers in Central Alabama will be especially concerned. Readings tonight are
expected to range between 20-28. With several hours of freezing readings expected, there
is a risk that we could lose much or all of the peach crop, which was expected to be
especially good this year. That could happen with only a couple of hours below 30F.
We will hope and pray for a miracle.

SUNRISE SERVICES:
Many congregations will be holding Easter Sunrise services in the morning. Conditions
will be dry and cold. So if your service is outdoors, make sure you are bundled up.

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The NWS Birmingham is predicting temperatures below freezing across all of Central
Alabama. They are expecting most reasings in the 25-30 degree range. They are
predicting temperatures to remain below freezing for at least 6 hours.

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