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Posted At: January 27, 2007 @ 12:22 PM

Posted By: Reed Timmer

A brief burst of heavy snow occurred in Norman, OK this morning as a small vort max moved over head.  Posted below is a radar image from around 11:30 am, and some pictures of the snow at its heaviest.

Posted At: January 25, 2007 @ 4:36 PM

Posted By: Reed Timmer

A prolific lake effect snow event has been occurring over the last few days downwind of the Great Lakes in MI, OH, PA, and NY.  As much as two feet of snow will fall in northwest PA and extreme northeast OH along the Lake Erie shoreline, as persistent cold northwesterly flow has prevailed over the region.  Shown below is a radar image showing a heavy band of lake effect snow in southwest Michigan.  Snowfall rates in excess of 1 inch power was common in that band.

Posted At: January 19, 2007 @ 2:20 AM

Posted By: Reed Timmer

Winter storm warnings have been issued over 3/4 of the state of Oklahoma, exlcuding the far southeast part of the state.  8 inches or more are possible over parts of southwest, central, north-central, and northeast Oklahoma by Sunday.  The precipitation shield has already developed in southwest Texas.

Posted At: January 15, 2007 @ 10:56 PM

Posted By: Reed Timmer

TornadoVideos.net storm chasers Reed Timmer and Dean Schoeneck ventured to eastern Oklahoma today to photograph the aftermath of the incredible January 12-14 ice storm that dropped 2-3 inches of freezing rain in McIntosh and Haskell Counties, including the town of Eufala.  Downed trees, powerlines, and an insane coating of ice were photographed, including several flipped-over vehicles.  Check out the video clip and still photographs below.  A detailed chase summary will be posted in the chase logs section shortly.

           

Posted At: January 13, 2007 @ 6:03 PM

Posted By: Reed Timmer

The second shortwave produced a few small thunderstorms with sleet over parts of central Oklahoma this morning, but accumulations of ice were minor.  Most of the widespread heavy precipitation developed just to the east of Norman/Oklahoma City, with parts of southeast Oklahoma receiving heavy freezing rain for most of the afternoon Saturday.  Below is a radar image just before the brief, heavy sleet began here in Norman.
                 

Posted At: January 12, 2007 @ 3:58 PM

Posted By: Reed Timmer

The first wave of precipitation from this major weekend ice storm in Oklahoma arrived early this morning, and has mainly been a mixture of freezing rain and sleet...but predominantly the latter.  So far, we have received about 1/8 inch of ice and an inch of sleet, with heavy sleet falling as of 4:00 pm CST.  Shown below is a brief video clip of the conditions just prior to the heavy sleet band, and our initial preparations for riding out the storm:

       

Posted At: January 12, 2007 @ 9:11 AM

Posted By: Reed Timmer

Moderate to heavy freezing rain is moving in to central Oklahoma as of 9:00 am CST.  As expected, the arctic front moved south through OK at a much faster rate than the models predicted, leaving temperatures in the upper twenties in central OK by Friday morning.  A freezing rain advisory has been issued for today, in addition to the ice storm warning tonight through Sunday to account for this early beginning.  However, this advisory may need to be upgraded to an ice storm warning soon given the heavy precipitation and cold temperatures.  Ice has already been accumulating on cars and grassy surfaces.  Pictures to come soon.
            

          

Posted At: January 11, 2007 @ 2:41 PM

Posted By: Reed Timmer

An Ice Storm Warning as been issued for southwest and central OK from Friday night through Sunday, for an extended period of potentially heavy freezing rain.  The following is a quote from the Norman NWS:

 "AN ICE STORM IS EXPECTED TO AFFECT THE AREA...WITH DAMAGING ACCUMULATIONS OF ICE EXPECTED OVER A WIDESPREAD AREA...NOW IS THE TIME TO PREPARE FOR A SIGNIFICANT ICE STORM...INCLUDING THE POSSIBILITY OF EXTENDED POWER OUTAGES."

The following are the NWS Norman Graphicasts from Thursday afternoon:

          

          

Posted At: January 11, 2007 @ 11:51 AM

Posted By: Reed Timmer

A major ice storm will slam central OK this weekend as a strong but shallow Arctic air mass and heavy convective precipitation coincide.  NWS Norman stated the following in their early morning discussion: "There could be a swath of ice accumulation measured in inches".  Right now, it appears that the most significant ice accumulations will occur along and just south of I-44.  Stay tuned for more updates.
                              

Posted At: January 11, 2007 @ 2:52 AM

Posted By: Reed Timmer

Significant ice accumulations are likely over central and northern OK from Friday night through Sunday.  A shallow Arctic air mass will drift southward across OK on Friday, and a strong vorticity maximum will produce heavy precipitation along and north of the front beginning Friday night.  Surface temperatures across central/northern OK will drop below freezing Friday night just before the heavy precipitation arrives, and with very warm temperatures just above the surface, the stage will be set for a major freezing rain event this weekend in OK.  The 00z Thursday WRF forecast temperature at 12z Saturday and 12z Sunday are shown below:
              
The WRF model forecast precip (6 hr accumulated) for the same times are shown below.  The first wave of freezing precipitation over central and northern OK will fall Friday night, with 0.25-0.5" ice accumulations.  The second wave of precipitation will fall Saturday night into Sunday, with another 0.5+" of additional ice accumulation.  However, this assumes the WRF verifies.  Stay tuned to TornadoVideos.net for further updates.