August 23, 2012
By Matt Straw
Fishing line climbs off the water and hangs overhead. Static electricity makes potent shocks emanate from graphite rods, reel seats, bolts, and every conductor on board.
Those are second and third wake-up calls. You should already be out of there. But the fishing's fantastic. Bass are almost jumping in the boat. In about 10 to 20 minutes the sky will lift, winds will pick up, the bite will disappear. The key question, of course, is: Why did you risk your skin for a bunch of fish? But anglers everywhere wonder, "Why did they stop biting? Fact is, nobody knows why bass and other species stop biting after a cold front passes, or why they often remain less active (especially big bass) for a few days afterward. But we have theories.
Cold Front Fishing Mechanics
Cold fronts are caused by moving masses of cold, dense air, which forces warmer air upward. Turbulence mixed with rising vapor can cause storms to form along the leading edge of the front. Cold fronts move in to two times faster than warm fronts and generally produce more dramatic changes in weather.
Crazy fluctuations in air pressure seem to affect bass most. Pressure decreases steadily as the front approaches, hits a low point as the front passes, then rises as dense, cold air settles in. Bass guides and pros have reported for years that, as a front approaches, bass move shallow and become highly active. If true (and it sure seems to be), it dispels the theory that bass are moving to equalize swim-bladder pressure. If so, they would move down in the face of decreasing pressure.
Conversely, according to that theory, bass should move up as pressure increases after the front passes. They don't. In most cases they move deeper. Post-frontal conditions are also characterized by bluebird skies. Maybe bass try to avoid excess radiation and brightness? Perhaps. But nix the swim-bladder stabilization theory.
Another bit of conjecture: Zooplankton rise in low pressure, baitfish follow, and bass feed accordingly. When pressure declines, zooplankton drop into cover, baitfish stop feeding, followed by bass. But that doesn't explain why bass remain less active for days afterward without incorporating other theories. If plankton stay in cover for days, so what? Bass could feed on crayfish, which don't focus on plankton at all. But they don't. They remain less active.
Some say bass are simply gorging then resting. Well, duh. They do that during stable weather, then put the feedbag back on the next day. Post-frontal bass don't do that. Face it. We can't address the physiological responses to cold fronts fish exhibit because we don't understand them yet. What we do understand is fishing. We can continue to catch bass after fronts if we adhere strictly to the rules. After a front moves through, and for days afterward in most cases, the strike window of larger bass (over 4 pounds) shrinks to an area mere inches in diameter.
They won't chase, they won't even move unless you put a bait right on their nose. Even then it might take 5, 6, or more presentations on the same spot to tempt a bite. In response, baits must be moved incrementally. It's slow, it's tedious, and it's impossible unless you have a good idea exactly where they live.
Tactical Approach To Cold Front Smallmouths
Targeting a river for smallmouth bass after a cold front is brilliant. Smallmouths in rivers may even continue to strike topwaters and cranks, but it's more likely you need to slow down and swim plastic grubs or resort to drop-shot rigging. They might position less aggressively as well. Instead of facing into current in classic feeding positions at the head of a pool or eddy, they may tuck in behind current breaks or position between the center and tail-out of a pool.
In natural lakes and reservoirs, smallmouth bass turn off, but follow a relatively predictable routine. After feeding heavily in depths of 2 to 12 feet, they drop down as the front hits and pressure increases. They tend to tuck in tight on sharp drops and ledges along whatever structure they were using. It's typical to find them at the base of the sharpest drop-off around reefs, points, humps, and channels in 12 to 25 feet. And they refuse to eat unless you politely insist.
Bluegills: Punchbait Attack
When summertime bluegills play hard to catch on the heels of a brutal front, veteran panfish hunter Scott Glorvigen punches petite plastics through thick cabbage canopies to tempt slab bluegills hunkered far below.
His go-to spots lie on weed-capped points and humps, often with a bit of coontail in the mix. To fish them, he wields a 7- to 8-foot, medium-power St. Croix Panfish Series spinning rod spooled with 10-pound superbraid mainline. The business end of the rigging includes a slipfloat, ¼-ounce bullet weight, small swivel, and 12-inch mono or fluorocarbon leader, tipped with a panfish-sized jig like a Northland Tackle Mud Bug, Gill-Getter, or Hexi Fly. A variety of plastics take panfish, but when the chips are down, a 1.25-inch Northland Mini Roundworm, rigged wacky-style, is hard to beat. You can also try it on a size 8 hook.
Make a short pitch, let the bullet sinker pull the rig down through the canopy to the base of the weeds, then twitch and pop the float in place to animate the plastic. With a long rod and the float close to the boat, vertical lifts are also deadly options.
Bass: Jungle Warfare
When cold fronts force largemouth bass to lay low, competitive bassin' standout Scott Bonnema plays the green card, plying thick vegetation ranging from shallow slop, rushes, and reeds to deep, cabbage-crowned points and weedline fringes in 15 to 18 feet of water.
Shallow bass are plucked from their lairs with a ½-ounce grass jig tipped with a 4-inch beavertail softbait like the Trigger X Flappin' Grub. You can also rig the same bait weedless on a 4/0 to 5/0 heavy, wide-gap hook, with a pegged, ½- to ¾-ounce bullet sinker. Pitch the bait into a pocket, let it sit for a few seconds, then lift it six inches off bottom, give it a shake and lower it again. Repeat two or three times per pocket and if you don't get bit, move on.
To search deep weeds, Bonnema advises switching to deep-diving crankbaits like Rapala's DT16. Make a long cast, reel the bait down, and begin a slow retrieve. 'Keep your rodtip close to the surface but off to the side, at about 2 o'clock, ' he offers. 'Occasionally move the tip to 12 o'clock, so it points to the bait. This makes the lure stop, pivot and hang there, which often triggers a strike. '
After catching a bass, Bonnema makes additional casts to the same area. 'You can often catch multiple fish from one spot, ' he explains, noting that he often switches to a jig-and-plastic combo to fully exploit a hot zone.
Crappies: Tightline Fever
When a cold front crushes the prespawn crappie bite in fast-warming shallows, don't throw in the towel. Take a tip from veteran crappie guide Barry Morrow of Eufaula Lake, Oklahoma.
Look for slabs gathered around structural sweet spots such as patches of grass, brush, or stumps along a channel break or shoreline drop-off. Use a loop knot to attach a 1/8- to ¼-ounce leadhead jig to 8- to 10-pound mono mainline. Tip the jig with a soft-plastic grub body (Morrow likes Lindy's Watsit and Fuzz-E-Grub) and hover the combo just off bottom.
Trout: Softbait Finesse
In stable weather with a breeze blowing against the bank, hungry rainbows, browns, and lakers cruising shoreline shallows are easy marks for casting or longline trolling swimbaits, spoons, and stickbaits. But when a front passes and bright sun beats on glass-calm waters, the bite fizzles.
'Aggressive tactics are out, ' says high-country guide and longtime salmonid stalker Bernie Keefe, of Granby, Colorado. 'But that doesn't mean you quit fishing. ' Keefe copes by finessing softbaits such as 4-inch bass-style tubes and 5-inch Berkley PowerBait and Gulp! Jerk Shads.
He threads subdued-colored softbaits on similarly drab leadheads up to half an ounce in weight. The heft helps fuel long casts and engenders easy bottom contact. 'Push the head tight against jerkbaits and deep into tubes, so the jig burrows into bottom, ' he advises. Make a long cast, let the jig settle, and begin a slow, bottom-oriented retrieve. Keep the rodtip at about 2 o'clock, alternately dragging, twitching, and pausing the jig. Pauses may linger 10 to 15 seconds.
Prime lies include the same flats, points, and inside turns that gave up trout before the front arrived, in depths of 2 to 15 feet. 'I like fishing sand, gravel, and mud, mainly because rocks eat rigs dragged along the bottom, ' Keefe explains.
Muskies: Green Party
During the early summer period, muskies commonly cruise fast-warming, soft-bottomed bays, especially those offering emerging greenery. In fair weather, you'll often enjoy the best action fishing along weed edges or over weed tops. Cold fronts change all that, pushing toothy giants deep into the jungle.
To extract sulking dragons from the salad, esox ace Pete Maina ties on a jig and dips it into the thickest, freshest cabbage around. He favors ½- to 3/8-ounce, single-hook leadheads sweetened with beefy softbaits like a 6-inch Berkley Gulp! Grub, 7-inch Gulp! Saltwater Jerk Shad, or 8-inch PowerBait Grub, rigged on a 12-inch wire leader and 65- to 80-pound Trilene Braid mainline.
'Don't be afraid to get down in the weeds, ' he says. 'If you just reel a jig over the canopy, you're making a mistake. ' Animation varies. 'I have no set cadence, ' he says, explaining that experimenting with varied rips, twitches, and other strokes allows him to quickly determine what muskies want at the moment. Two constants, however, are a slow-falling jig, and responding to snags by snapping the rodtip. When you hang up, snap the jig to rip it free, ' he says, noting that such maneuvers often trigger violent strikes.
Walleyes: Cold Front Campout
'Cold fronts and barometric pressure changes shut down walleyes — with large fish being more affected than small ones, ' says veteran guide Jon Thelen. 'Walleyes are tighter to structure and less active, so you need to slow down your presentation and camp out over any fish marked on sonar. Many times, you have to put the bait in front of their nose to get them to bite. '
Thelen favors the iconic Lindy Rig. He likes the 72-inch original version in clear water and over smooth substrate, while shorter options work wonders in snaggy conditions. Sliding sinker weights range from ¼ ounce in the shallows to 3/8 ounce in deeper water. Standard walking sinkers are great on bare bottoms, but he opts for Lindy No-Snaggs when water hazards are a factor.
Leeches and minnows are top choices for post-frontal rigging. 'When I'm working classic summer structure like the edge of a mid-lake hump and spot a fish on my graph, I hit the brakes and hover over the fish, letting the bait do its thing until it eventually entices the fish to bite, ' he says.
If Thelen encounters a group of walleyes schooled in a small area, he may add jigs to the presentational mix. 'A Lindy Jig tipped with a minnow can be deadly, ' he says. 'During a tough bite, a slow drag-lift-drop approach often outfishes more aggressive jigging, although it pays to experiment. '
In other words, you have to be pretty certain you're on fish. Underwater cameras help because fish can be hard to find on sonar. Bass eventually respond to slow, persistent presentations, however. Cast back to key spots repeatedly. Drop-shot rigging is a potent weapon in these conditions. Gently twitching a bait in place, and leaving it in place for long periods of time, finally entices bites—if you're fishing right in their face. The problem with a drop-shot rig is unwanted movement. Your pulse pounding through your fingers can make a dangling plastic dance. I often find that a football head dressed with a 3-inch craw or spider grub works better when the bait needs to remain perfectly still at rest.
Joe Balog, Great Lakes smallmouth ace, has to fish tournaments whether a front passes or not. He recommends slowing down after a front. "The mood of a smallmouth changes under overcast, stormy conditions," he notes. "Smallmouths and largemouths both become negative. My answer has been a drop-shot rig. I won a BFL event in 2009 on Lake St. Clair in a terrible summer storm. The fish were murdering crankbaits right up until the front came through. As soon as the rain hit, I could only get bit on drop-shots fished slowly.
"In deeper water, like Lake Erie, effects of fronts are less predictable," he adds. "I prefer sun, but I've taken some monster stringers in rain and sudden cold. I always go to a dark bait in those conditions, like a dark melon tube. I think they see it better. Shallow fish are unpredictable at best. Deep bass seem less affected. From 25 feet on down, you catch bigger fish more consistently after fronts pass. I also rely on baits infused with scent, like Berkley Gulp! or Trigger X, and I grind them out with a drop-shot rig. Some baits won't work if I don't add scent."
After cold fronts pass, I commonly find smallmouths tucked into the base of sharp drops along the deep edge of whatever structure they were using before the front hit. In shallow lakes, these spots might be 10 to 14 feet deep, right along the edge of the last boulders or hard bottom defining the base of a reef where it blends into softer substrates. In deep lakes and reservoirs, it might be 15 to 40 feet deep (release fish immediately when they're hooked deeper than 20 feet), often on a ledge, shelf, or boulder line along the face of a bluff.
Try to hold the lure still on a taught line for long periods. Waves, current, and boat movement move the line anyway, but that's okay. A scented 3-inch Yamamoto Craw or Hula Grub on a 1/8- to 3/8-ounce football head is a favorite. Another is a Gulp! Minnow or Jackall Cross Tail Shad on a drop-shot rig. Just the attempt to hold small baits motionless in waves imparts a subtle range of tension that rolls, wiggles, lifts, and drops the bait. In calm water, drop-shot rigs work even better, while jigs must be dragged slowly with long pauses.
Small fish typically dominate the catch when fishing largemouths after a summertime cold front, largely because we fail to change tactics. Big bucketmouths seem philosophically opposed to chasing anything—even a slow swim jig—after a front. Deadsticking softbaits can be effective for big largemouths in the first 24 hours after a front passes. But, again, knowing where they live is critical.
Go back where you were catching them previously and concentrate on the thickest, deepest cover. Fish slower, and make repeated casts to high-percentage spots. Largemouths bury under the thickest canopies, as if trying to keep every photon of that bluebird sunlight off their bodies. Weights and jigs must penetrate that cover.
Most options can be rigged on a belly-weighted hook for deadsticking. Adjustable weights are ideal because shifting weights forward on the hook creates a nose-diving effect. The new Sebile Soft-Weight System, with small tungsten adjustable weights is great. Leave the bait on bottom for minutes at a time. Continue to work thick cover at a painstaking pace.
In northern natural lakes, I target the same humps, weedlines, and cover that's been producing best. But after barometric pressure begins to rise, largemouths no longer hold on top or in classic ambush positions. They bury themselves under weed and wood cover. A heavy, weedless, drop-shot rig often works best, using weights of 1 ounce or more. This rig can plummet through dense cover and sit there, enticing a strike, as long as you care to leave it in place. Scent makes a big difference for largemouths as well, after a front. I add Dr Juice Bass Scent to all softbaits. Use whatever product you have most confidence in.
Big bass don't always drop into deep water after a front. They might be in 6 to 8 feet of water or less if cover is thick. Smallmouths feeding in 6 feet of water often position in depths of 10 to 12 feet after a front, tight to the base of a reef, hump, or point. Spend most of your time fishing dense cover on inside turns in the weedline near sharp breaks, or the base of the break on rocky structure, and bass eventually reveal themselves—but only if you insist. Politely.
Matt, Straw, Brainerd, Minnesota, is a smallmouth guru and In-Fisherman Field Editor.