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Severe Thunderstorm Watch Issued for Alabama

| 1:11 am April 20, 2015

4-20-2015 1-10-54 AM
BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 85
NWS STORM PREDICTION CENTER NORMAN OK
110 AM CDT MON APR 20 2015

SEVERE THUNDERSTORM WATCH 85 IS IN EFFECT UNTIL 700 AM CDT
FOR THE FOLLOWING LOCATIONS

. ALABAMA COUNTIES INCLUDED ARE

BLOUNT CHEROKEE COLBERT
CULLMAN DEKALB ETOWAH
FAYETTE FRANKLIN JACKSON
LAUDERDALE LAWRENCE LIMESTONE
MADISON MARION MARSHALL
MORGAN WALKER WINSTON http://www.jamesspann.com/wordpress/wp-admin/media-upload.php?post_id=90623&type=image&TB_iframe=1

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Severe Threat Lessens But Continues

| 12:51 am April 20, 2015

Posted 12:49 a.m.

The SPC has issued a new Mesoscale Discussion for Alabama:

4-20-2015 12-48-24 AM

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New Severe Thunderstorm Warning Further East

| 12:49 am April 20, 2015

Posted 12:49 a.m. Sunday

4-20-2015 12-52-03 AM

Severe thunderstorms in Northwest Alabama from Hamilton to east of Vernon in Lamar County have produced winds over 60 mph. Be in safe shelter as these dangerous storms approach.

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
NORTHEASTERN LAMAR COUNTY IN WEST CENTRAL ALABAMA…
MARION COUNTY IN NORTHWESTERN ALABAMA…
NORTHWESTERN FAYETTE COUNTY IN WEST CENTRAL ALABAMA…

* UNTIL 130 AM CDT

* AT 1247 AM CDT…SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 9 MILES NORTHWEST OF HACKLEBURG TO NEAR WESTON TO
NEAR VERNON…MOVING NORTHEAST AT 50 MPH.

HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE…RADAR INDICATED.

IMPACT…EXPECT WIND DAMAGE TO ROOFS…SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE…
HAMILTON…WINFIELD…FAYETTE…GUIN…HACKLEBURG…BRILLIANT…
GLEN ALLEN…BEAVERTON…GU-WIN…BLOOMING GROVE…BLUFF…BRINN…
LAKE BUTTAHATCHEE…BEAR CREEK…TWIN…PINEY GROVE…TESSNER…
WAYSIDE…FOWLERS CROSSROADS AND PIKEVILLE.

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Severe Thunderstorm Warning: Lamar and Marion Counties

| 12:28 am April 20, 2015

Posted 12:31 a.m.

2015-04-20_00-36-01

UPDATE AT 12:45 AM
Trees are reported down at Shottsville in Marion County.

ORIGINAL POST
Strong winds from a heat burst or similar phenomenon has caused a 66 mph wind gust at Columbus AFB just across the border in Mississippi from Lamar County. These winds can cause damage.

The storms near Caledonia MS could produce large hail as well. This activity will push to near Vernon in Lamar County.

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
LAMAR COUNTY IN WEST CENTRAL ALABAMA…
NORTHWESTERN MARION COUNTY IN NORTHWESTERN ALABAMA…

* UNTIL 115 AM CDT

* AT 1227 AM CDT…SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM AMORY TO 11 MILES NORTHWEST OF BEDFORD TO NEAR
ABERDEEN TO NEAR COLUMBUS AFB…MOVING NORTHEAST AT 45 MPH.

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Heat Burst!

| 12:28 am April 20, 2015

Decaying thunderstorms over South Central Mississippi have caused a phenomenon we normally only see across the Plains: a heat burst.

As thunderstorms die, evaporating precipitation falling into dry air making the more dense that its surroundings. It sinks and heats by compression, drying at the same time.

When this air hits the ground, it spreads out causing strong winds. Temperatures rise and dewpoints drop rapidly. This happened at Jackson MS in the past hour.

2015-04-20_00-08-43

This could reach over into Sumter County shortly. Interesting.

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Storms Are Weaker, But Still Pack a Punch

| 12:04 am April 20, 2015

4-20-2015 12-02-08 AM

Monday, 12:05 a.m.

Strong storms continue to march across Mississippi tonight, but they have weakened somewhat over the past hour.

There are no warnings in Mississippi now.

There have been reports of large hail and 40 mph wind gusts in the past hour in the storm that is currently near New Albany.

All of this activity will push into Northwest Alabama from Lamar and Marion Counties into Franklin, Colbert and Lauderdale. The storms should continue to slowly weaken.

The threat of severe weather is diminishing as the storms move into more stable air, but there still could be severe weather overnight. We are waiting to see if the watch will be extended into Alabama. We will continue to monitor closely.

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