Nov 17, 2013 Severe Weather Outbreak, White County, Indiana EF-2 Tornado

November severe weather. How often does that happen? Not much for full outbreaks. This is an account of my adventure into a rare High risk severe weather outlook in mid-November.

We left from Mount Pleasant at 7am Sunday, dark and early. The air was cool, but a warmer wind blew as I crossed the parking lot with 4 items under my arms and on my back. Two cameras, a tripod, backpack with instruments, and a laptop. Our destination was unknown at the time. We had a goal to reach South Bend, IN as this was a reasonable distance to travel and still be within an area of elevated severe chances. We went through all sorts of data on the trip down. It all gets overwhelming and at some point you just need to let it happen.

We took a pit stop at a BK. Kevin and Bryan take notes on current conditions before heading further south.

We took a pit stop at a BK. Kevin and Bryan take notes on current conditions before heading further south.

We reached South Bend and carried on. At this time, storms were firing in central Illinois. We stopped at a fast food restaurant and used some stronger Wifi. About this time the Peoria, IL storm was really cranking up. The storm showed strong structure and looked to remain on a fixed path towards Chicago. Things could go sour fast. This was the EF-4 tornado that affected Washington, IL, carving a large scar through a populated area. From our current spot, we had no chance in intercepting this storm as some of these were moving to the northeast as fast as 60 mph! As we went south, wooded areas became fields with only pockets of trees.

From the NWS in Chicago, IL. Note the cell that has a hook-echo signature near Peoria, IL and continues NE where it impacted Washington, IL as an EF-4.

As we traveled south, the area of storms started to fill in from single cells, to a uniform line. This was bad news if seeking tornadoes. Usually large and strong tornadoes spawn from single power-hungry supercells so they have no neighbors to compete for energy, or be bothered by outflow winds. A line of storms meant winds would be straight and not possibly rotating, thus little chance at a tornado. The line directly to our west was filling in to just be severe thunderstorm level winds and heavy rains. We had a new goal of intercepting a cell coming from Champaign, IL. The cell had exhibited rotation from central Illinois, and had been tornado warned earlier.

We continued to race south on I-65. Towards central Indiana, 65 starts slightly curving to the east so that it goes trough Lafayette, IN. This bought us some time and we found ourselves immersed in a large wind farm. We exited I-65 at  the SR-18 interchange. There we sat for about a half hour to assess storm motion. Looking at the storm, we noted the good structure had diminished and it could just form into a line of high winds instead. Storms moving through Lafayette were looking enticing, but there was no way we would make it down there in time. So this was it. We made our way back towards the interchange and sat pointed west, awaiting our prize.

Turbines lined the road in front of us. These closest ones were the last to disappear in front of our eyes.

Turbines lined the road in front of us. These closest ones were the last to disappear in front of our eyes.

Being in a large wind farm, we could see turbines disappearing in the heavy rain as the line approached. We enjoyed that as entertainment, helping heal the wound of not finding a tornado after a long travel. It traveled quickly. One turbine gone, and then the next. Then the wall of rain and wind hit us.  It immediately reminded me of hurricane videos. My ears popped from pressure change, which was really weird when you are used to that happening changing altitude. Rain was being whipped around in sheets and you could see no further then 10 feet in front of our car. Grass was mimicking the behavior as it was whipped around. This was probably enhanced by the lack of any large objects to block the wind. The wind was traveling over clean and flat farmland for acres in our W and SW direction. It quickly became frightening. Although it didn’t seem much different from a squall line in Michigan. Some other things suddenly became realized.

light

I looked down to my phone with the current radar displayed. We had underestimated the storm’s strength and organization due to poor storm velocity data outside of radar range. This is called range folding. Range folding is purposefully put in place on weather radar to prevent having a false signal reported, so it helps accuracy within reliable ranges. We decided to set up shop in a spot of ambiguity between two nearby radar sites. This is a big no-no as we had virtually been blind.

After a moment of panic in the car with the suddenness of wind and blinding rain, it quickly got worse. New radar scans came in and the velocity image showed a spot of rotation making its way straight for our area. The signature was not a strong tight rotation typically associated with tornadoes, but given the environment we were in, there could be a rain-wrapped tornado on track to us.Fear continued to sink in.
This is NOT how you chase/spot/report severe weather.

whitecountyef2

Our location, marked by a yellow cross, with reflectivity, velocity, spectrum width, and rotation radar overlays. CLICK for ANIMATION and larger.

Winds seemed to calm a bit, I could see further out the side window, at least the field  to the north 20 yards away. We discussed the ears popping and how much the pressure needed to change for that to happen. We had Kestrel devices with us, so we could check that later. At this point we were furiously waiting for radar scans to come in and keep us updated. The winds began to increase again. They got stronger then when the storm began. Rain caused a complete whiteout and I could no longer see anything out of the window, front or sides.

heavy

Lighting was quick, bright, and frequent. The car began rocking like a boat. Sharp clatter prompted Bryan to call to duck our heads. Debris began a migration across the road in front and behind us, maybe even over us. Lots of twisted sheet metal tumbled by like pieces of paper. Then, it was done.

debris

A car drove through behind the wall of rain, like some sheep dog corralling a heard. Sheet metal continued to carry on a path across the road from south to north. Pieces lined a wire fence nearby. We waited for remaining lightning to stop while rear flank winds licked at our car. Once it was safe, we emerged and checked the car. No damage at all. The van that had been behind us checked on us and drove on, wiping his arm across his forehead with relief. Mammatus filled the sky as the system moved out. We could also make out a beaver tail of clouds flanking the storm.

We got very lucky. Once things calmed down, I called a report of a possible rain-wrapped tornado to the National Weather Service in Indianapolis (we were actually in Northern Indiana’s forecast area, but they forwarded the report). We found other evidence when investigating to the southwest. A few barns had been destroyed and a roof removed from a house. Photos can be found in this Flickr album.

20:09 13 NW LAFAYETTE POSSIBLE RAIN WRAPPED TORNADO. SHEET METAL CAUGHT IN A FENCE. NEAREST BUILDINGS ACROSS A FIELD A FEW ACRES AWAY.

With the Canon 6D, all of my photos were geotagged. This made it easy to document where we were relative to the damage we found, and to further report to the NWS.

Example of some photos geotagged to a map in Lightroom. Very handy to have for documentation!

Example of some photos geotagged to a map in Lightroom. Very handy to have for documentation!

The National Weather Service in Northern Indiana confirmed a EF-2 tornado with max wind speeds of 125mph near our location. You can read the full writeup including more maps and radar imagery on their event summary page, which included 15 tornadoes from EF-0 to EF-2 across their forecast area alone!

RATING: EF-2
MAXIMUM ESTIMATED WIND SPEED: 125 MPH
MAXIMUM ESTIMATED PATH WIDTH: APPROXIMATELY 1400 YARDS
PATH LENGTH: 9.52 MILES (LONGER IF YOU INCLUDE BENTON COUNTY
SECTION)
START TIME: ESTIMATED AROUND 246 PM EST
END TIME: ESTIMATED AROUND 255 PM EST
LOCATION: ENTERED WHITE COUNTY NEAR BENTON/WHITE/TIPPECANOE COUNTY
BORDER. LIFTED APPROXIMATELY 2 MILES WNW OF BROOKSTON.
DESCRIPTION: CONTINUED FROM BENTON COUNTY. VERY WIDE CIRCULATION
WITH EMBEDDED VORTICIES. 20 TO 25 BARNS DESTROYED WITH DEBRIS THROWN
UP TO 2 MILES AWAY. 10 TWO FOOT DIAMETER WOODEN ELECTRICITY POLES
SNAPPED AT THE BASE. SMALL HOME HAD ITS ROOF COMPLETELY REMOVED WITH
THE DEBRIS THROWN UP TO HALF A MILE NORTHEAST. SECTIONS OF THE ROOF
WERE STUCK IN THE GROUND LIKE PROJECTILES.

Again, we were super fortunate to drive away from this. There is so much to pour over and be thankful for. Witnessing the damage done by these storms is shocking, and I can’t imagine what places like Washington, Illinois looks like first hand. My thoughts go to those who have lost all.

Other sites with storm review:

EDIT:

Some track maps were released earlier Friday and the picture is a bit clearer where the exact path went, just across a field south of our position at the I-65 and 18 interchange.

Early Week Rumblings (July 8, 2013)

A weakening cold front will bring rain and embedded thunderstorms today. Near time of posting, the swath of rain was fairly impressive and is sure to bring a relief to a recent slowdown in rain amounts. Nothing like a nice rainy day now and then. Some storms do seem to be popping up ahead and in the complex. These should be brief with a few rumbles of thunder here and there.

Swath of showers and thunderstorms will move through Michigan this afternoon and early evening.

Swath of showers and thunderstorms will move through Michigan this afternoon and early evening.

Meanwhile, a stronger front with much cooler air will develop in the Midwest and track eastward on Tuesday. With this stronger front come stronger thunderstorm parameters. The usual players will be there. Lift will be provided by the cold front, moisture is already in place with high dew-points into the 60-70 range, and the atmosphere will have instability as CAPE values approach 3000 J/KG. Additional parameters to look at include wind shear; which is how the wind changes(speed/direction/both) from the Earth’s surface to 6 or so kilometers in the atmosphere, and occasionally the LI or Lifted Index(another indicator of instability); comparing a theoretical air parcel’s temperature to the environment temperature surrounding it.

The Storm Prediction Center is calling for a few solutions to this event, mainly around a few Mesoscale Convective Systems. These will birth in the Midwest and track eastward with the front. Main threat will be some strong winds and large hail with these systems. Tornadoes can be a threat as well, generally during initial discrete development, but not limited to.

Temperatures will be in the mid to upper 80s through Wednesday. Once these fronts pass early week, Thursday and Friday will be cooler before temperatures rebound into the 80s for the weekend.

Stay tuned to the Facebook page for tiny updates and cool weather stuff from the social media world.

Thanks for the read, feel free to comment/ask questions!

Springing Along

The past few weeks have proved a questionable spring. Temps failing to reach 60, frozen precipitation, a sun missing in action….can’t rely on Midwest weather to be on a consistent time-table.

At least two of these mentioned will be absent this week. Perhaps the most justifying, rain and warmer weather will arrive.

Rain is no stranger so far this Spring. A nice dose of 2+ inches across the region last week has us well above normal for the year(yellow line). Rain is again in the forecast for the week. Rainmakers will appear on Monday/Monday Night, as well as heading into Thursday when conditions may threaten for some severe weather along the Michigan/Ohio border. This will need to be looked at as the week progresses. Through next Saturday, a good two inches of rain could fall in already saturated areas, so flooding will again be possible.

Grand Rapids climate graph of 2013 so far.

Grand Rapids climate graph of 2013 so far.

At least the precipitation will be in liquid form. Sleet was reported in southern Michigan on Sunday, and Central Michigan University campus had a delayed start on Friday thanks to a sleet/freezing rain combination Thursday evening. That event may have been worse had the days leading up to the storm not been above freezing. Ground warmth did a good job at fighting off ice accumulation on surfaces. Trees don’t harbor this ability as well, and ice on the branches was evident while out and about on Friday.

Warm weather will filter into the region with our rain producing pattern. A ridge will amplify over the Midwest, and the warm air will be allowed to travel north. However, with that transport is the mentioned moisture. Temperatures will start in the lower 60s for Monday, and top out in the mid/upper 60s on Thursday. Once we have our stormy day on Thursday, the associated cold front and trough will bring in some cooler spring air, but still above freezing during the day. Yay progress! Hang in there!

Severe Weather Tips

As daylight becomes longer and temperatures get warmer, we move into our yearly cycle of weather changes. Snowstorms become rain and thunderstorms, and there is plenty to take note of as we head into another year of severe weather.

As produced by National Weather Service offices around Michigan, April 7-13 is Severe Weather Awareness week!

Earlier in March, I was remembering the unique events that launched Spring 2012 into a craze. We had record temps into the 80s, and multiple tornadoes tear across eastern Michigan. It was a very interesting start to the year, and it kept you on your toes for forecasting and figuring out just what the heck is going on up there! While Spring 2013 is moving in like a lamb, that lion could be waiting right around the corner, and being prepared is a priority.

Greg’s Tips for Severe Weather

NOAA Weather Radio
This is the single most valuable thing you can have for warning during a stormy day! We absorb weather through many sources these days; internet, TV, radio, word of mouth. When the winds start brewing and the power goes out, many of these reliable sources are cut down. Even if you have a backup generator, chances are your media services(internet/cable TV) will not be powered in your area. Having a battery-powered weather radio can keep you up to the minute warnings and weather information. The warning signal usually beats web updates by a few minutes as well. Weather Radios are also a hero at night if the house is asleep and dangerous weather is near. Keep them charged with batteries nearby!

Know Your Surroundings
This goes along great with the weather radio. While forecasters may get as specific as calling out road names and cities where the storms are near, you should also know the County names surrounding your location. Storms typically move West to East, sometimes SW to NE, sometimes NW to SE. Bottom line, know where you are relative to where the storm is. If you think a dangerous storm is going to miss you, do not take it for granted. Supercell thunderstorms are known to waver on path, and sometimes can change direction. Be prepared for anything!

Skywarn Classes (http://www.nws.noaa.gov/skywarn/)
These are great chances to learn about weather a little more in detail, and refined to severe weather scenarios. They are free, and usually run by a few forecasters from your local NWS office. That means they are run by the folks that track and watch for storms on a daily basis and know what to look for. You will go over everything from how to report weather threats to authorities, to determining if that ominous dark cloud is a wall cloud or shelf cloud(important!). Usually there is a great Spotter’s Field Guide that is handed out for quick reference, there is an online PDF version available here. Once you have learned this material, you become a very valuable resource to forecasting as you are an eye witness to the weather in your area. As useful as that is, always make sure your safety is first! NEVER put yourself in danger to get a report.

Know Your Clouds
As mentioned previously, knowing the difference between clouds can mean loads for the weather to expect. Low flying scud could prompt you to call it a wall cloud(precursor to tornadoes), but is that cloud rotating as well? Is is attached to the base of cloud above it? How about those shelf clouds that take up the entire horizon? Much of this is detailed in the Skywarn classes, but this is something that can help you out in a fix, and impress others.

Wall Cloud SE of Mount Pleasant, MI

Example of a wall cloud just SE of CMU campus back in May 2011.

Heed Warnings
“Yea, that storm is way far from my house, I don’t need to pay attention.” Always take note of Watches/Warnings. Along those lines, know the difference between a Watch and a Warning.

Severe Thunderstorm Watches and Tornado Watches mean conditions in the atmosphere are favorable for that type of weather to develop, so be ready for storms later in the day, or within the next couple hours.

Severe Thunderstorm Warnings and Tornado Warnings mean a severe storm has been spotted/identified, and is tracking along the specified path.  Take appropriate action immediately if you are in the track of the storm.

Again,
Watches = be ready for storms soon/later in the day
Warnings = take action immediately if you are identified in the path of a storm

A disclaimer I must make about the blog; Greg’s Weather Blog is not a good source for immediate severe weather forecasting! Please do not rely on this page for up to the minute information on storms! Head to http://www.weather.gov for that, and type in your Zip Code to find yourself quickly and any Watches/Warnings that are in effect.

Take care out there!