Jump to content

Some of the latest advances in weather computers


Recommended Posts

Since Posting The Don Noe Thread, I have been doing some research on the latest advances in weather computer technology and all I can say is WOW! Since I lost TV when Charley came ashore, the black-and-white TV and radio could not show me this, but the coverage of Frances has really showed off these tools.


VIPIR is what you see most common on stations like Local6 - Orlando, News12/Fox29 - Palm Beach, NewsChannel 8 - Tampa, etc. Here is the link to VIPIR.



Another nice tool is NEXRAD Level II. Link to NEXRAD Level II



MicroCast which is used here in Fort Myers by FOX4 forecasted Charley and Frances almost to the tee. Link to MicroCast.

Link to comment
Share on other sites

Article from Charley:

Coping with Crisis

Florida stations face coverage challenges during Hurricane Charley

By Ken Kerschbaumer -- Broadcasting & Cable, 8/23/2004



When Hurricane Charley slammed into Fort Myers, Fla., two weeks ago, it caught the National Hurricane Center (NHC) and local stations off-guard. "Tracking a hurricane can get pretty esoteric," says John Emmert, news director at WINK in Fort Myers. "It's not an exact science because there's never a fixed point where it can land."


That meant local forecasters in Fort Myers had to make a life-or-death decision: Do they listen to government reports or trust their own meterologists?


In this instance, they were hobbled by conflicting reports from the NHC, which delayed notifying TV stations and the public about Charley's velocity and danger for nearly an hour. Aware of the pressing need to get viewers critical information in a timely manner, Fort Myers broadcasters decided to call the shots.


WZVN and WBBH Fort Myers share a weather department, a Baron Services Millennium Doppler radar system and Nexrad information. At 9:45 a.m., Jim Reif, WZVN chief meteorologist, and WBBH meteorologist Robert Van Winkle both made viewers aware of the hurricane. But it wasn't until 11 a.m. that they reported it was heading toward Fort Myers.


The delay was due to the NHC, which first thought Hurricane Charley was hitting Tampa Bay; then the hurricane wobbled and changed course. In fact, Bay News 9, the local cable news network in Tampa, was the first to report Charley would hit land before reaching the city?even before the NHC. And it went on air with the news, a move that resulted in a swift response from FEMA.


Bay News 9 General Manager Elliott Wiser says that at one point, a local emergency-services official told his staff not to believe the reports. "But the channel remained confident, having invested in its own Doppler radar and assembled a staff of five meteorologists. "That's why you hire these guys," Wiser says.


Yet it's precisely this lack of consistent and timely information?NHC claimed one thing, FEMA another?that stymied TV stations.


At 10 a.m., the NHC's Hurricane Hunter plane reported winds of 120 knots per hour. At 11 a.m., it confirmed a drop in pressure, both signs of a move from category 2 to category 3. But NHC didn't raise the danger level. At 1 p.m., the plane reported winds of 141 knots per hour?enough to move from category 3 to category 4. Again, it was nearly an hour later before TV stations, and the public, were notified.


"The NHC needs to figure out how it can disseminate information in real time," says Reif. He hopes upcoming meetings between broadcasters and the NHC, as well as the Florida government, will improve the distribution of information.


The drawback is this: Real-time information could lead to improper evacuation procedures. Hurricanes and storms wobble all the time, so when Charley began wobbling around 9:45 a.m., the NHC stuck to its guns, claiming it was heading toward Tampa. To do otherwise may have stopped evacuation plans. If it wobbled back, people would not know whether to stay or go.


Local stations had to go with the information and technology at hand. "We actually sent our truck down to Tampa," says Emmert. "Within an hour of knowing it would hit north Charlotte County, we had the truck back in the area."


Van Winkle says the Doppler radar system showed Charley's strengths while he was talking to a reporter on his cell phone. "The reporter said a roof just flew by him, and I told him the eye was just about to pass over him," says Van Winkle. "Two minutes later, he said the sky was sunny. It's really an amazing tool for us."


Reif applauds the zoom-in ability of the system as the most useful. "It's meter-mapping capability allowed us to see individual details of the bands as it came in," he says. "We could watch a close-up of the eye and see it approach the coastline."


WINK Fort Myers, Fla., has a combination of Doppler radar from Advanced Designs Corp. (ADC) along with data it pulls in from NEXRAD Agencies, which has a radar operations center based in Norman, Okla. Nexrad pulls in data from the National Weather Service, Air Force, Navy, FAA and other support contractors. It also helps track a storm while it's still days away from land. But as it gets closer, it's up to systems like the ADC's to help narrow a storm's path. For all the science involved, there are still variables, such as the 200- to 300-mile range of landfall that may be affected.


Emmert says WINK follows the lead of the county's emergency management center when it comes to evacuation warnings. But when it comes to information from the NHC and its storm path recommendations, differences can arise. "We have the right to [switch gears] if we get other information," he adds. "We aren't alone with our concerns," says Reif, about stations meeting with the NHC in March. "We'll have a continuing dialogue, so the next time, we'll be headed in the right direction."



Cover All Bases

Together, Doppler, Nexrad track key weather information


Any TV station in an area frequented by hurricanes, tornadoes and winter storms may take a two-pronged approach to providing viewers with reliable information. It can use a Doppler-based weather system, along with a Nexrad system, which pulls in satellite information from government agencies.


The one-two punch supplies the best long-range information from the Nexrad system, which tracks storms days ahead of arrival, and short-range information from the Doppler-based system, which operates best when the storm is within 75 miles.


David Starnes, Baron Services director of broadcast sales, explains that it's critical to have both systems, since Nexrad does a better job of receiving information from ground level up to 10,000 feet. A Doppler system can't do that. "You can't say that because you have access to one system you don't need the other," says Starnes.


Jim Sawtelle, ADC, Southwestern region marketing manager, says the challenge of tracking hurricanes is that Doppler radar systems typically sit on land, so it runs into limitations of "radar horizon" caused by the curvature of the earth. Doppler works by sending energy waves out to a storm. As the energy runs into resistance, in the form of precipitation, more energy is returned to the station.


"That's why it's able to paint a proper picture of the storm as it gets closer," he says.


ADC's systems are 100% solid-state based; there are no tubes involved. That makes the system easier to maintain, more reliable and safe. "It doesn't work any differently than the tube transmitters?it still emits an electromagnetic pulse," he says.


Starnes disagrees. His company's tube-based system has 350,000 watts of power vs. 200 watts for solid-state systems. The result, he says, is better imagery. The additional wattage helps push the energy pulses that much farther into (and through) a storm. Tube-based systems have also improved in maintenance, though a $15,000 tube is usually replaced about every five years.

Link to comment
Share on other sites

This thread is quite old. Please consider starting a new thread rather than reviving this one.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...