Jump to content
  • Member Statistics

    17,603
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

Severe Weather 5-4 through 5-9-23


 Share

Recommended Posts

Mixed signals on today…

On one hand, early day convection has chewed away at much of the thermodynamic environment across Oklahoma and effectively, points north. Relatively weak lapse rates, modest boundary layer moisture and limited air mass recovery is expected. 

With that said, an effective warm front is draped near or just south of the Red River. Lapse rates are steeper out in West Texas and trends suggest there will be moderate destabilization taking place in the Northwest Texas vicinity through the day. This combined with enhancement of upper level flow and backing of low level winds suggest there could be some supercell potential, possibly tornadic, this afternoon. I’d guess somewhere near the Red River.

Central to South Texas looks like a more obviously favored area for severe and locally significant severe (very large hail).

 

  • Like 2
Link to comment
Share on other sites

There are some days where it pays to hold fast to your preconceived target area (like 3/31 for me, was planning to go to SE IA after getting off work at noon but overnight/morning of IL started to look much better according to CAMS which was tempting due to depicted later initation/slower upscale growth, would have cost me Keota :twister: that is in my avatar had I bit, as those simulated sups east of the MS formed but by and large did not produce photogenic :twister:). Today is not one of those days. So much for OK/KS border. OK/TX border it is, for those chasing!

Link to comment
Share on other sites

image.png.cd62fcab5b4d7eb2eef4a4d65201fc00.png

 

 

Mesoscale Discussion 0673
   NWS Storm Prediction Center Norman OK
   0143 PM CDT Thu May 04 2023

   Areas affected...northwest TX...far southwest OK

   Concerning...Severe potential...Tornado Watch likely 

   Valid 041843Z - 042045Z

   Probability of Watch Issuance...80 percent

   SUMMARY...Convective initiation will probably occur near the
   dryline/outflow intersection prior to 3pm.  A tornado watch is being
   considered for portions of northwest TX and immediately adjacent
   parts of southwest OK.

   DISCUSSION...Visible satellite imagery shows a towering cumulus
   field centered on Garza County, TX near a dryline bulge.  Surface
   analysis indicates a messy placement of boundaries across northwest
   TX and southwest OK.  The aforementioned dryline extends southwest
   from near the Caprock into the Pecos Valley.  An outflow boundary
   extends from the southeast TX Panhandle arching southeast into
   northwest TX to the south of the Red River, while a synoptic warm
   front/composite boundary extends eastward near the Red River. 
   Surface temperatures north of the outflow/warm front are in the 60s
   with 70s nestled in between the warm front and outflow boundary.  To
   the south of the outflow boundary, temperatures have warmed into the
   lower 80s in locations void of denser mid to high-level cloud cover.
    
   Surface dewpoints are in the lower 60s east of the dryline from near
   San Angelo to north of Abilene.  Additional heating will occur as
   the cirrus shield over western north TX shifts east and upwards of
   1500 J/kg MLCAPE is forecast by mid afternoon.  Effective shear will
   support a supercellular mode.  Large to very large hail (diameters 1
   to 2.5 inches) and a tornado are possible with storms that manage to
   mature and optimally interact in the vicinity of the west-east
   oriented low-level boundaries.

   ..Smith/Thompson.. 05/04/2023
Link to comment
Share on other sites

Confirmed TOG in Brown County, TX

Tornado Warning
National Weather Service San Angelo TX
652 PM CDT Thu May 4 2023

The National Weather Service in San Angelo has issued a

* Tornado Warning for...
  Northeastern Brown County in west central Texas...

* Until 715 PM CDT.

* At 652 PM CDT, a tornado producing storm was located near May,
  moving east at 35 mph.

  HAZARD...Damaging tornado.

  SOURCE...Radar confirmed tornado.

  IMPACT...Flying debris will be dangerous to those caught without
           shelter. Mobile homes will be damaged or destroyed.
           Damage to roofs, windows, and vehicles will occur.  Tree
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northeastern Brown County, including the following locations...
  Owens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3181 9898 3199 9903 3202 9889 3186 9877
      3184 9877
TIME...MOT...LOC 2352Z 258DEG 32KT 3192 9892

TORNADO...OBSERVED
Link to comment
Share on other sites

MD 677 graphic

 

 Concerning...Tornado Watch 185...

   Valid 050013Z - 050145Z

   The severe weather threat for Tornado Watch 185 continues.

   SUMMARY...A cluster of supercells should continue eastward for a few
   more hours with a risk for hail and possibly a couple of tornadoes
   towards the eastern edge of WW185.

   DISCUSSION...Over the last hour, a cluster of supercells in North TX
   has shown signs of intensification with higher reflectively and
   deeper MESH cores noted from regional radar analysis. Additional
   storm development/clustering has also been observed, suggesting
   low-level jet intensification is ongoing. 1000-1500 J/kg of MLCAPE
   should continue to support robust updrafts toward sunset as storms
   move eastward at around 25 kt.

   Current HRRR forecasts and observational trends suggest some upscale
   growth is possible but the storm mode is expected to remain
   primarily supercellular given 40-45 kt of effective shear. Large
   hail will remain possible with these storms given the supercell mode
   and steep mid-level lapse rates near 8 C/km. Some increase in
   low-level shear may also support a couple of tornadoes across
   portions of North TX as backed low-level flow increases and the
   low-level jet intensifies. Given that storms are approaching the
   eastern edge of WW185, a new watch or a local extension may be
   needed across portions of north TX and far southern OK in the next
   hour.
Link to comment
Share on other sites

27 minutes ago, Ed, snow and hurricane fan said:

3 km NAM, DFW Metroplex, 6 pm as intense cells form in the area.  Shear is meh, but look at how fat the CAPE is.  I wonder if DFW gets into the 10% hatched hail.

May5NAM3kmMetroplex..png

I haven't really invested much time/energy into this marginal setup, but seeing that sounding and what you say about the 3km NAM's depiction...

 

image.png.0e7baf1c4d2fb963405410c24b848725.png

 

  • Haha 1
Link to comment
Share on other sites

Heavy rain, looking at 12Z and 15Z HRRR, may be a threat DFW area, although WPC Day 1 is Marginal.  Even as a blob with little shear, dry adiabatic (9.1C/Kg) lapse rates 850-500mb per 3 km NAM, big hail has to be a possibility.  Near 1500 J/Kg downcape.  HRRR lapse rates not quite as impressive, but shear is higher.  Ferris, TX, just ahead of the storms.

hrrr_2023050615_013_32.49--96.71.png

Link to comment
Share on other sites

After full morning sunshine, what's left of the low cloud field from the Hill Country has moved into DFW and slowed down the rise in temps.

We'll see how quickly it mixes out entirely and what impacts that has on destabilization, unlike yesterday where there was virtually no cloud obstruction

 

Link to comment
Share on other sites

53 minutes ago, Ed, snow and hurricane fan said:

Heavy rain, looking at 12Z and 15Z HRRR, may be a threat DFW area, although WPC Day 1 is Marginal.  Even as a blob with little shear, dry adiabatic (9.1C/Kg) lapse rates 850-500mb per 3 km NAM, big hail has to be a possibility.  Near 1500 J/Kg downcape.  HRRR lapse rates not quite as impressive, but shear is higher.  Ferris, TX, just ahead of the storms.

hrrr_2023050615_013_32.49--96.71.png

FWD did add heavy rain wording to the grids.

Damaging straight lines winds could be a greater threat today versus the past 2 days with much more precip loading and what looks to be a weak shortwave moving through (cold pool potential).

Hi-Res models do look more bullish for the Metroplex than they did Thursday and Friday.

  • Like 1
Link to comment
Share on other sites

Here is a cluster of storms developing now in the enhanced risk section in Texas  (30% hail and wind). They look like they are all developing into supercells. The 0-6km shear of 30 kt means the really should be struggling to develop into supercells, but the 300mb wind is a pretty reasonable 50 kt.  It already looks like we could be seeing dozens of hail reports in the next few hours.

 

cluster of storms.jpg

Link to comment
Share on other sites

637 PM CDT Sat May 6 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHWESTERN BROWN COUNTY...

At 637 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Byrds, moving northeast at 10 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed. Damage
         to roofs, windows, and vehicles will occur.  Tree damage is
         likely.

This dangerous storm will be near...
  Byrds around 640 PM CDT.
  May around 715 PM CDT.
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...