Serving Up More Delicious Weather!

(Sunday, July 19, 2009) – The Sunday Evening surface weather map showed high pressure dominating from Chicago to Birmingham. A frontal boundary near the Gulf Coast divided the summer-time heat and humidity from this delicious weather we’ve been enjoying which have included some record cool nights and record cool days as well.

This intrusion of Canadian air is made possible by the dominance of an upper atmospheric trough. Its axis extends from James Bay Canada to the Gulf Coast.

The question is how long will this good weather pattern last? It appears that the general pattern of a ridge over the west and trough over the east should predominate for the work week. The trough will relax a bit and this will let out temperatures moderate somewhat as the week progresses.

A surface trough/front and upper level disturbance will bring us rain chances from the Tuesday night through Thursday night time frame. We may pull off staying out of the 90s all week. Enjoy!

DELIGHTFUL TEMPERATURES SETTING RECORDS

RECORD REPORT…UPDATED
WEST TENNESSEE WEATHER ONLINE JACKSON TN
1:51 PM CDT SUN JUL 19 2009

…DELIGHTFUL TEMPERATURES SETTING RECORDS…

THE LOW TEMPERATURE THIS MORNING AT MCKELLAR-SIPES REGIONAL AIRPORT WAS 55º. THIS ESTABLISHES AN NEW RECORD LOW FOR JULY 19TH. THE PREVIOUS RECORD WAS 59º SET IN 1976 AND TIED IN 1984. THE NORTH JACKSON CLIMATE STATION AND THE SOUTH JACKSON CLIMATE STATION (BEMIS)  BOTH  HAD LOWS OF 56º. 

A RECORD HIGH WAS SET IN JACKSON ON SATURDAY. THE HIGH TEMPERTURE AT MCKELLAR-SIPES REGIONAL AIRPORT, WAS 78º. THIS SETS A NEW RECORD LOW MAXIMUM TEMPERATURE FOR JULY 18TH. THE PREVIOUS RECORD WAS 84º IN 1976. THE NORTH JACKSON CLIMATE STATION LIKEWISE HAD A HIGH OF 78º ON SATURDAY. IN SOUTH JACKSON/BEMIS, THE HIGH WAS 80º.

EH
www.jacksonweather.net

July Cool Snap? Yes!!!

(Friday, July 17, 2009) – Weather map for Sunday morning showing Canadian air mass settling into our region.  High pressure sprawled out all over the Mississippi River Valley and Eastern States.  High humidity will be shoved well south and cooler temperatures will be handed to us for enjoyment!

Here is a table of temperature forecasts through the weekend.  The blue temperature in parenthesis is the record low for the day:

Day           Low        High

Today                        83

Saturday    54 (56)   82

Sunday       55  (59)   81

Strong Storms; Heavy Downpours Overnight

Severe Weather Outlook

ISSUED AT 203 PM CDT SUN JUL 5 2009

A FEW STRONG THUNDERSTORMS PRODUCING STRONG WIND GUSTS AND HEAVY RAINFALL IS POSSIBLE ACROSS AREAS ALONG AND SOUTH OF I-40 THIS AFTERNOON.

What Happened? Late-Night Sirens Warrented?

(Sunday, July 5, 2009) – At 12:33 AM, the NWS in Memphis issued a tornado warning (see text below) that included Madison County.  This was based on the rotational signature (see radar image below, note the yellow circle) that was near Cedar Grove in Carroll County.  In the radar image the green against the red in the image was a rotational signature that prompted the warning.  The NWS uses a “storm-based” polygon warning system in which the polygon now projects the path and areas that could be affected by the storm.  This polygon picked up the NE corner of Madison County.  Thus the sirens were triggered. 

At 12:49 AM, the warning was cancelled for Madison County (see text below).

1233 AM CDT SUN JUL 5 2009

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* TORNADO WARNING FOR…
  SOUTHWESTERN CARROLL COUNTY IN NORTHWEST TENNESSEE…
  HENDERSON COUNTY IN SOUTHWEST TENNESSEE…
  NORTHEASTERN MADISON COUNTY IN SOUTHWEST TENNESSEE…

* UNTIL 115 AM CDT

* AT 1234 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM PRODUCING A TORNADO 8 MILES NORTH OF BLUE
  GOOSE…OR 10 MILES SOUTHEAST OF MILAN…MOVING SOUTHEAST AT 20 MPH.

===========================================================

1249 AM CDT SUN JUL 5 2009

…THE TORNADO WARNING FOR NORTHEASTERN MADISON AND SOUTHWESTERN
CARROLL COUNTIES IS CANCELLED…

AT 1248 AM CDT…WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA
…AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE…THE TORNADO WARNING IS CANCELLED.

Tornado Warning for Madison County Cancelled

1249 AM CDT SUN JUL 5 2009

…THE TORNADO WARNING FOR NORTHEASTERN MADISON AND SOUTHWESTERN CARROLL COUNTIES IS CANCELLED…

AT 1248 AM CDT…WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA …AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE…THE TORNADO WARNING IS CANCELLED.

Tornado Warning for Madison County…Storms Are East of the County

Storms are east of Madison County and moving AWAY from the county.

Severe T’storm Watch Expanded; Storms North of I-40 Pushing East

(Saturday, July 4, 2009) – The NWS in Memphis has expanded the Severe Thunderstorm Watch (#547) to include Carroll and Henry Counties.  This is in addition to Lake, Obion and Weakley Counties already under the watch which continues through 8 PM. 

Shortly before 6 PM CDT, NWS Doppler radar was inticating a band of scattered thunderstorms from near Dresden to Newbern to Dyersburg. The storms are moving east at 40 mph.  The strongest activity was in Dyer County.  Severe thunderstorms are impacting the Jackson Purchase area of Western KY.  West TN residents near the KY state line need to monitor the movement of those storms this evening.

Severe Risk Appears to be Diminishing Some

…Severe Thunderstorm Watch in Effect Until 8 PM for Lake, Obion and Weakley Counties…

From the NWS in Memphis:

A FEW THUNDERSTORMS MAY BECOME SEVERE ACROSS PORTIONS OF EAST ARKANSAS AND WEST TENNESSEE TONIGHT. THE TIME OF GREATEST THREAT FOR SEVERE THUNDERSTORMS IS FROM 4 PM TO 11 PM. ANY THUNDERSTORMS THAT BECOME SEVERE WILL PRODUCE DAMAGING WINDS AND PERHAPS LARGE HAIL. HEAVY RAINFALL IS ALSO POSSIBLE WITH THESE THUNDERSTORMS.