The Storm Prediction Center (SPC) is forecasting a moderate risk for severe weather today and into tonight for portions of the Southern Plains and Southeast. Another tornado outbreak is possible along with large hail and damaging winds. The following is the public discussion released by the SPC this morning at 11:50 CDT:
TORNADOES LARGE HAIL AND DAMAGING WINDS OVER PARTS OF EASTERN TEXAS NORTHERN AND WESTERN LOUISIANA AS WELL AS SOUTHERN AND EASTERN ARKANSAS THIS AFTERNOON AND TONIGHT... THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE DEVELOPMENT OF TORNADOES...LARGE HAIL AND DAMAGING WINDS OVER PARTS OF EASTERN TEXAS...NORTHERN AND WESTERN LOUISIANA AS WELL AS SOUTHERN AND EASTERN ARKANSAS THIS AFTERNOON AND TONIGHT. THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE - EASTERN AND SOUTHERN ARKANSAS - NORTHERN AND WESTERN LOUISIANA - EASTERN TEXAS ALSO...A THREAT FOR OTHER SEVERE THUNDERSTORMS ARE EXPECTED FROM CENTRAL TEXAS EASTWARD ACROSS THE LOWER MISSISSIPPI VALLEY AND NORTHWARD INTO THE WESTERN PORTIONS OF TENNESSEE AND KENTUCKY. A POTENT UPPER LOW AND STRONG JET MAX WILL MOVE EAST ACROSS TEXAS/LOUISIANA AND ARKANSAS LATER TODAY AND TONIGHT...WITH A SURFACE LOW AND COLD FRONT SHIFTING FROM EASTERN TEXAS ACROSS THE LOWER MISSISSIPPI VALLEY TONIGHT. AHEAD OF THIS FRONT...THE COMBINATION OF A MOIST AIR MASS...DAYTIME HEATING AND COOLING ALOFT WILL RESULT IN AN UNSTABLE ENVIRONMENT FAVORABLE FOR WIDESPREAD SEVERE THUNDERSTORMS...ESPECIALLY FROM MID AFTERNOON THROUGH MIDNIGHT. THE WIND SHEAR WILL BE QUITE STRONG...AND FAVOR TORNADOES...SOME STRONG...ESPECIALLY ACROSS NORTHEAST TEXAS... NORTHERN LOUISIANA AND ACROSS PORTIONS OF SOUTHERN AND EASTERN ARKANSAS. ALTHOUGH TORNADOES ARE ALSO POSSIBLE ACROSS SOUTHEASTERN TEXAS AND LOUISIANA...A SQUALL LINE IS EXPECTED TO DEVELOP AND MOVE ACROSS THIS REGION LATE THIS AFTERNOON/EVENING...WITH DAMAGING STRAIGHT-LINE WINDS MORE LIKELY. STORMS WILL CONTINUE EASTWARD INTO MISSISSIPPI...WESTERN TENNESSEE AND WESTERN KENTUCKY OVERNIGHT WITH A THREAT OF DAMAGING WINDS AND ISOLATED TORNADOES. THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
A severe weather outbreak occurred across the Tennessee Valley, southern Appalachians and into central Georgia/South Carolina, starting Friday, March 14th and continuing into today. One supercell thunderstorm developed west of Atlanta, quickly intensified and drug a tornado directly across downtown Atlanta causing extensive damage to many structures (including high-rises). The following HAMrad II animation shows the storm as it moved through downtown Atlanta and finally weakening after passing to the east of the city. The National Weather Service reported that based on the damage investigation, this tornado was an EF-2 with winds up to 130 mph and a path of about 6 miles.
The following is the official NWS report regarding their damage investigation on the Atlanta tornado:
0938 PM TORNADO 1 NW ATLANTA 33.77N 84.43W 03/14/2008 F2 FULTON GA EMERGENCY MNGR NWS DAMAGE SURVEY CONCLUDED AN EF2 TORNADO 6 MILES LONG AND 200 YARDS WIDE TUCHED DOWN AT SIMPSON AND BURBANK ROAD AT 938 PM. IT MOVED ACROSS DOWNTOWN ATLANTA AND CAME UP AT THE CORNER OF BRAEBURN AND JOSEPHINE ROAD IN WESTERN DEKALB COUNTY.
Earlier today additional supercell thunderstorms developed across the northern suburbs of Atlanta bringing additional storm damage in the form of very strong winds, large hail and even several tornadoes. Several moved close to the HW offices in Kennesaw, including the storm depicted in the following image which brought up to 3″ diameter hail and a possible tornado near Canton just to the north of our offices.
The following map shows the official NWS storm reports across Georgia since yesterday, the second of which only showing the tornadoes and/or funnel clouds that were reported (click for full-size image).
Expanding on the great success of our HAMrad I service, we have been busily working to create our upcoming HAMrad II service which is now in live beta testing.
Some of the great new features of HAMrad II include:
As always, and especially during our beta period, we welcome comments and suggestions. No official go-live date has been set but will be determined by the beta testing period.