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Short-Term Severe/Flooding Discussion


Quincy
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We managed a PDS tornado warning and brief touchdown in MO today.

 

214a92t.png

 

 

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
711 PM CDT FRI SEP 18 2015
 
MOC037-190030-
/O.CON.KEAX.TO.W.0036.000000T0000Z-150919T0030Z/
CASS MO-
711 PM CDT FRI SEP 18 2015
 
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CENTRAL
CASS COUNTY...
 
AT 710 PM CDT...A CONFIRMED LARGE AND EXTREMELY DANGEROUS TORNADO WAS
LOCATED OVER FREEMAN...MOVING EAST AT 20 MPH.
 
THIS IS A PARTICULARLY DANGEROUS SITUATION.
 
HAZARD...DAMAGING TORNADO.
 
SOURCE...LAW ENFORCEMENT CONFIRMED TORNADO....

 

 

0010   FREEMAN CASS MO 3862 9451 TORNADO REPORTED WITH SNAPPED POWER LINES AND TREES. MINOR STRUCTUAL DAMAGE TO HOMES REPORTED. (EAX)

 

0008   FREEMAN CASS MO 3862 9451 TORNADO REPORTED IN FREEMAN WITH DAMAGE TO ROOFTOPS (EAX)

 

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  • 1 month later...

BULLETIN - EAS ACTIVATION REQUESTED  
TORNADO WARNING  
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX  
535 AM CDT SAT OCT 31 2015  
 
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY  HAS ISSUED A  
 
* TORNADO WARNING FOR...  
  NORTHERN BRAZORIA COUNTY IN SOUTHEASTERN TEXAS...  
  NORTHWESTERN GALVESTON COUNTY IN SOUTHEASTERN TEXAS...  
  SOUTHEASTERN HARRIS COUNTY IN SOUTHEASTERN TEXAS...  
 
* UNTIL 600 AM CDT  
      
* AT 535 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A  
  TORNADO WAS LOCATED OVER PEARLAND...MOVING NORTHEAST AT 30 MPH.  
 
  HAZARD...TORNADO.   
 
  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...  
  SOUTH HOUSTON...SOUTH BELT / ELLINGTON...ELLINGTON FIELD AND  
  EDGEBROOK AREA AROUND 545 AM CDT.  
  CLEAR LAKE AROUND 550 AM CDT.  
  DEER PARK...MORGAN'S POINT AND HOUSTON SHIP CHANNEL AROUND 600 AM  
  CDT.  
  

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Now a confirmed one...

 

 

Tornado Warning
SEVERE WEATHER STATEMENTNATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX601 AM CDT SAT OCT 31 2015TXC071-201-291-311115-/O.CON.KHGX.TO.W.0040.000000T0000Z-151031T1115Z/CHAMBERS TX-HARRIS TX-LIBERTY TX-601 AM CDT SAT OCT 31 2015...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FORNORTHWESTERN CHAMBERS...EAST CENTRAL HARRIS AND SOUTHWESTERN LIBERTYCOUNTIES...AT 600 AM CDT...A CONFIRMED TORNADO WAS LOCATED OVER SAN JACINTOSTATE PARK...OR OVER LA PORTE...MOVING NORTHEAST AT 35 MPH. AT 550AM PASADENA FIRE DEPARTMENT REPORTED A TORNADO AT GENOA AND REDBLUFF ROADS IN PASADENA.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 TORNADO WILL BE NEAR...  BAYTOWN AND HIGHLANDS AROUND 610 AM CDT.  BARRETT AROUND 615 AM CDT.PRECAUTIONARY/PREPAREDNESS ACTIONS...TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW! MOVE TO ABASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDYBUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A MOBILE HOME...ORIN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECTYOURSELF FROM FLYING DEBRIS.
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  • 1 month later...
  • 4 weeks later...

A couple of reports of damaging winds across coastal central to Southern California today.

 

At the moment, a healthy-looking bowing segment is approaching the area just north of San Diego. A pair of discrete supercells formed out in front just offshore. Have already seen one report of a waterspout.

 

An MD was just issued. 5% watch probabilities. Mentioning a couple of damaging wind gusts and perhaps a tornado.

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It looks like central California had a tornado yesterday. No official word on anything in Southern California yet.

 

EF-0 TORNADO TOUCHED DOWN NEAR THE HIGHWAY 152-HIGHWAY 156 INTERCHANGE ... APPROXIMATELY 7 MILES NORTH OF HOLLISTER. THERE WAS INTERMITTENT DAMAGE ALONG A 1 MILE PATH

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  • 2 months later...

Could see a few hail-producing storms tonight on either side of the Red River from northwest Texas into southern Oklahoma. HRRR continues the theme of moderate instability tonight, that the SPC was doubting from earlier NAM progs. Based on mesoanalysis and trends,  some pockets of >1000 J/kg CAPE could be realized this evening. Given very steep mid-level lapse rates/cold air aloft, hail is the main threat.

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There is a severe thunderstorm nearly stationary over Custer State park in the South Dakota Black Hills right now. 3" hail was reported. Vehicles are said to be stuck in accumulating hail. Flash flooding may be ongoing.I don't know how to post the warnings. It is the Rapid city  SD weather office.

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There is a severe thunderstorm nearly stationary over Custer State park in the South Dakota Black Hills right now. 3" hail was reported. Vehicles are said to be stuck in accumulating hail. Flash flooding may be ongoing.I don't know how to post the warnings. It is the Rapid city  SD weather office.

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE RAPID CITY SD

728 PM MDT FRI MAY 20 2016

SDC033-103-210145-

/O.CON.KUNR.SV.W.0008.000000T0000Z-160521T0145Z/

CUSTER SD-PENNINGTON SD-

728 PM MDT FRI MAY 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT

FOR NORTH CENTRAL CUSTER AND SOUTHWESTERN PENNINGTON COUNTIES...

AT 728 PM MDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE

EXTENDING FROM CUSTER STATE PARK TO KEYSTONE...AND ARE NEARLY

STATIONARY.

 

THESE ARE VERY DANGEROUS STORMS.

HAZARD...BASEBALL SIZE HAIL AND MANY INCHES OF ACCUMULATED HAIL.

SOURCE...LAW ENFORCEMENT. SEVERAL INCHES OF HAIL HAS ACCUMULATED IN

         THE KEYSTONE AND IRON MOUNTAIN AREA.

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This storm has dropped an estimated 5.5" on the Black Hills mountaintops-- this is probably causing raging creeks and rivers, perhaps threatening a few rural areas and campgrounds. I hope there weren't any hikers caught in that. That's some major water and lightning.

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SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE RAPID CITY SD

728 PM MDT FRI MAY 20 2016

SDC033-103-210145-

/O.CON.KUNR.SV.W.0008.000000T0000Z-160521T0145Z/

CUSTER SD-PENNINGTON SD-

728 PM MDT FRI MAY 20 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT

FOR NORTH CENTRAL CUSTER AND SOUTHWESTERN PENNINGTON COUNTIES...

AT 728 PM MDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE

EXTENDING FROM CUSTER STATE PARK TO KEYSTONE...AND ARE NEARLY

STATIONARY.

 

THESE ARE VERY DANGEROUS STORMS.

HAZARD...BASEBALL SIZE HAIL AND MANY INCHES OF ACCUMULATED HAIL.

SOURCE...LAW ENFORCEMENT. SEVERAL INCHES OF HAIL HAS ACCUMULATED IN

         THE KEYSTONE AND IRON MOUNTAIN AREA.

The UNR LSR indicates that 8 inches of hail had accumulated. Holy cow.  :yikes:  

0416 PM HAIL 3 S KEYSTONE 43.85N 103.42W

05/20/2016 E1.75 INCH CUSTER SD LAW ENFORCEMENT

8 INCHES OF HAIL ACCUMULATED. MOTORISTS STRANDED ON

IRON MOUNTAIN ROAD. SNOW PLOWS HAVE BEEN CALLED OUT TO

CLEAR ROADS.

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This storm has dropped an estimated 5.5" on the Black Hills mountaintops-- this is probably causing raging creeks and rivers, perhaps threatening a few rural areas and campgrounds. I hope there weren't any hikers caught in that. That's some major water and lightning.

This brings to mind the 1972 Rapid city flood. It started in the Hills near keystone.  There were 15'' of rain in 6 hours and the flood killed 239 people.  I don't think it is likely to happen again.

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  • 2 weeks later...

The MCC in Oklahoma has created a train wreck this morning (Monday). Still a chance things recover in Colorado; note 12 hours of sunlight to go as I type. Temps/Dews should be adequate by late afternoon. LLJ looks just-in-time JIT but tries late afternoon. With the main outflow boundary buried to the south Palmer Divide topography may have to work on its own. Outflow lifting back north may be better aligned with Raton Mesa topography late this afternoon. Despite JIT recovery, I think it is at least a local set-up in Colorado.

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For tomorrow: SPC introduced an Enhanced risk for eastern Kansas, western Missouri, and parts of IA and NE. With such high CAPE and some possibility of very low LCLs in Kansas, as well as reasonable SRH and 35kt of shear, this might a signal for >5% tornado risk in some section of eastern Kansas. Eastern Oklahoma may need to have the slight risk also.

Edit: also 50-55kt winds at 300mb could help sustain supercells

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Line coming out of foothills moving way too fast, not enough time for warming after initial stratus/crud in the Denver metro area. Might end up being a bust- any time/energy for another round later?

 

Figures, I actually got buckets over the roses, the cars in the garage and the glass patio table under the roof before I left this AM.

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Line coming out of foothills moving way too fast, not enough time for warming after initial stratus/crud in the Denver metro area. Might end up being a bust- any time/energy for another round later?

 

Figures, I actually got buckets over the roses, the cars in the garage and the glass patio table under the roof before I left this AM.

Some areas are probably developing thunder, from what used to be rain showers just a short time ago. Still nothing super organized.

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