National Weather Service United States Department of Commerce

Fall Weather Pattern Arrives

Rain and much cooler temperatures behind a cold front will bring a feeling of fall to the east coast today. In addition, an active fall storm pattern developing in the Pacific Northwest this week will bring areas of heavy rains, and very high elevations could receive heavy snow. Wetting rains to the valley floors will spread south Thu and Fri into northern California,where active fires continue. Read More >

Synopsis

 

There were two rounds of strong to severe thunderstorms that impacted the region over the weekend of the March 30-31, 2013. The first round of severe weather developed in the evening across portions of southern and central Oklahoma along a weak pre-frontal trough that stretched across the Southern Plains from the Caprock to the Missouri Ozarks. Clearing across the western half of Oklahoma through the late morning and early afternoon resulted in temperatures climbing into the 70s and 80s. Combined with these warm temperatures, seasonable dew points in the mid to upper 50s provided good overall instability from central Oklahoma to northern Texas. Between 5 and 6 PM CDT, a few isolated thunderstorms quickly developed near the Wichita Mountains and central Oklahoma. Large hail developed with these storms, with many reports (see summary of Local Storm Reports below) of 1 to 1.5 inch hail. The strongest of these storms, over Comanche County, near Cache, produced 2.30 inch hail. The few isolated updrafts slowly weakened/dissipated through 10pm, leading to a lull in activity until later in the evening as the primarily cold front finally surged through the region.

The second round of thunderstorms were focused primarily along a strong cold front that surged southward across the Oklahoma and into northern Texas by Sunday morning. The first showers developed shortly before midnight across northwestern Oklahoma, and quickly intensified through the early morning hours of the 31st as the front quickly moved southward into the better axis of instability across central Oklahoma. These initial updrafts quickly intensified and congealed into a semi-organized squall line that moved directly through the Oklahoma City metro after 3 AM CDT. Winds along this line were estimated to be near 60 mph, with reports of quarter sized hail in OKC, numerous reports of quarter to golf ball sized hail in Norman, and quarter sized south through Carter and Johnston Counties. The squall line surged quickly to the south crossing the Red River Valley between 6 and 7 AM CDT where it continued to produce large hail and severe winds across northern Texas.

 

Radar Loop

 

The radar loop spans from 5:07 PM CDT on March 30, 2013 through 5:59 AM CDT on March 31, 2013.

 

Local Storm Reports

 
 
..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     HAIL             6 NNW CACHE             34.71N 98.66W 
03/30/2013  E1.00 INCH       COMANCHE           OK   PARK/FOREST SRVC

            AT CAMP DORIS IN WICHITA WILDLIFE REFUGE

0620 PM     HAIL             CACHE                   34.63N 98.62W 
03/30/2013  E1.50 INCH       COMANCHE           OK   TRAINED SPOTTER 

0625 PM     HAIL             3 NW LAKE LAWTONKA      34.76N 98.54W 
03/30/2013  E1.00 INCH       COMANCHE           OK   TRAINED SPOTTER 

0630 PM     HAIL             6 SE CACHE              34.57N 98.54W 
03/30/2013  E1.25 INCH       COMANCHE           OK   PUBLIC          

            NEAR INTERSECTION OF DEYO MISSION RD AND SW WOODLAWN DR.

0633 PM     HAIL             CACHE                   34.63N 98.62W 
03/30/2013  E1.75 INCH       COMANCHE           OK   TRAINED SPOTTER 

0642 PM     HAIL             1 ENE CACHE             34.63N 98.60W 
03/30/2013  M2.30 INCH       COMANCHE           OK   TRAINED SPOTTER 

0701 PM     HAIL             7 WSW LAWTON            34.56N 98.54W 
03/30/2013  E1.25 INCH       COMANCHE           OK   TRAINED SPOTTER 

0704 PM     HAIL             7 SE CACHE              34.56N 98.53W 
03/30/2013  E1.00 INCH       COMANCHE           OK   TRAINED SPOTTER 

0704 PM     HAIL             4 NW EARLSBORO          35.30N 96.85W 
03/30/2013  E0.50 INCH       POTTAWATOMIE       OK   FIRE DEPT/RESCUE

0727 PM     HAIL             5 WSW ELGIN             34.75N 98.37W 
03/30/2013  E1.75 INCH       COMANCHE           OK   TRAINED SPOTTER 

0735 PM     HAIL             2 NW SEMINOLE           35.25N 96.70W 
03/30/2013  E0.50 INCH       SEMINOLE           OK   PUBLIC          

0802 PM     HAIL             5 WNW WALTERS           34.38N 98.39W 
03/30/2013  E1.00 INCH       COTTON             OK   TRAINED SPOTTER 

0805 PM     HAIL             3 W WALTERS             34.36N 98.36W 
03/30/2013  E1.00 INCH       COTTON             OK   BROADCAST MEDIA 

0833 PM     HAIL             5 SW POCASSET           35.14N 98.02W 
03/30/2013  E1.00 INCH       GRADY              OK   TRAINED SPOTTER 

0854 PM     HAIL             HOLDENVILLE             35.08N 96.40W 
03/30/2013  E1.00 INCH       HUGHES             OK   EMERGENCY MNGR  

0900 PM     HAIL             3 W TABLER              35.05N 97.87W 
03/30/2013  E1.00 INCH       GRADY              OK   TRAINED SPOTTER 

0332 AM     HAIL             9 WSW OKLAHOMA CITY     35.42N 97.66W 
03/31/2013  E1.50 INCH       OKLAHOMA           OK   PUBLIC          

0352 AM     HAIL             4 WNW NORMAN            35.24N 97.51W 
03/31/2013  E1.25 INCH       CLEVELAND          OK   PUBLIC          

0354 AM     HAIL             NORMAN                  35.22N 97.44W 
03/31/2013  E1.25 INCH       CLEVELAND          OK   TRAINED SPOTTER 

0355 AM     TSTM WND GST     2 NW NORMAN             35.24N 97.47W 
03/31/2013  M59.00 MPH       CLEVELAND          OK   AWOS            

            MAX WESTHEIMER AIRPORT

0355 AM     HAIL             NORMAN                  35.22N 97.44W 
03/31/2013  E1.00 INCH       CLEVELAND          OK   PUBLIC          

            NW 36TH AND MAIN STREET

0400 AM     HAIL             2 S NOBLE               35.11N 97.39W 
03/31/2013  E1.75 INCH       CLEVELAND          OK   TRAINED SPOTTER 

0400 AM     HAIL             2 SSW NORMAN            35.19N 97.46W 
03/31/2013  E1.75 INCH       CLEVELAND          OK   PUBLIC          

0400 AM     HAIL             NORMAN                  35.22N 97.44W 
03/31/2013  E1.25 INCH       CLEVELAND          OK   TRAINED SPOTTER 

            INTERSECTION OF FLOOD AND CRUCE STREETS

0400 AM     HAIL             2 WSW NORMAN            35.21N 97.47W 
03/31/2013  E2.00 INCH       CLEVELAND          OK   PUBLIC          

            SW 24TH AND BROOKS STREET

0400 AM     TSTM WND GST     2 WSW NORMAN            35.21N 97.47W 
03/31/2013  E60.00 MPH       CLEVELAND          OK   PUBLIC          

0400 AM     HAIL             3 SSE NORMAN            35.18N 97.42W 
03/31/2013  E1.00 INCH       CLEVELAND          OK   NWS EMPLOYEE    

            AT THE NWS FORECAST OFFICE

0405 AM     HAIL             1 SW NORMAN             35.21N 97.45W 
03/31/2013  E1.25 INCH       CLEVELAND          OK   TRAINED SPOTTER 

0424 AM     HAIL             1 E NOBLE               35.14N 97.38W 
03/31/2013  E1.50 INCH       CLEVELAND          OK   TRAINED SPOTTER 

0445 AM     HAIL             3 W WAYNE               34.92N 97.37W 
03/31/2013  E1.00 INCH       MCCLAIN            OK   BROADCAST MEDIA 

0510 AM     TSTM WND GST     5 E STRINGTOWN          34.47N 95.97W 
03/31/2013  E60.00 MPH       ATOKA              OK   PUBLIC          

0510 AM     TSTM WND DMG     6 S DICKSON             34.10N 96.99W 
03/31/2013                   CARTER             OK   PUBLIC          

            TREE LIMBS UP TO FOUR INCHES IN DIAMETER SNAPPED OFF BY 
            THUNDERSTORM WINDS.

0510 AM     HAIL             1 N VANOSS              34.78N 96.87W 
03/31/2013  E1.75 INCH       PONTOTOC           OK   EMERGENCY MNGR  

0530 AM     HAIL             2 WNW ROFF              34.64N 96.87W 
03/31/2013  E1.00 INCH       PONTOTOC           OK   CO-OP OBSERVER  

0530 AM     TSTM WND DMG     SULPHUR                 34.51N 96.97W 
03/31/2013                   MURRAY             OK   LAW ENFORCEMENT 

            A WINDOW WAS BLOWN OUT AT A LOCAL BUSINESS. A POWER LINE 
            WAS ALSO DOWN. TIME OF THE REPORT ESTIMATED.

0557 AM     HAIL             ARDMORE                 34.17N 97.14W 
03/31/2013  E1.00 INCH       CARTER             OK   TRAINED SPOTTER 

0600 AM     HAIL             2 SW MANNSVILLE         34.17N 96.90W 
03/31/2013  E1.00 INCH       MARSHALL           OK   PUBLIC          

0612 AM     HAIL             1 N FILLMORE            34.29N 96.50W 
03/31/2013  E1.00 INCH       JOHNSTON           OK   CO-OP OBSERVER